A light pulse processing system and method

Abstract

This application discloses an optical pulse processing system and method. The system includes: a reference optical pulse source for generating an optical pulse sequence; an intensity modulator connected in series with the reference optical pulse source; the intensity modulator, upon receiving a low-speed optical pulse signal carrying data information to be processed, fits the low-speed optical pulse signal to the optical pulse sequence to obtain a standard optical pulse signal; and a high-speed signal acquisition device connected in series with the intensity modulator. The high-speed signal acquisition device performs a resonant operation on the standard optical pulse signal, and then another intensity modulator selects a high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device, thereby acquiring the high-speed optical pulse signal. This application achieves a change in the modulation speed of the optical pulse signal by inputting the optical pulse signal carrying the data information to be processed into the high-speed signal acquisition device, performing a resonant operation, and then having a corresponding intensity modulator select the high-speed optical pulse signal carrying complete information.

Description

Technical Field

[0001] This application relates to the technical field of optical fiber communication, specifically to an optical pulse processing system and method. Background Technology

[0002] With the continuous development of integrated circuits, photonic chips have shown promising application prospects. Photonic chips can receive optical pulse signals, process them, and then output the processed optical pulse signals. While the speed of the optical pulse signals received by photonic chips is not high, they typically require processing high-speed optical pulse signals to achieve intensive and high-speed information processing. Therefore, after receiving an optical pulse signal, a photonic chip needs to first modulate the low-speed optical pulse signal into a high-speed optical pulse signal before performing processing.

[0003] Currently, electro-optic modulators are used to modulate low-speed optical pulse signals to obtain high-speed optical pulse signals. For example, lithium niobate thin-film electro-optic modulators use ridge-shaped thin-film waveguides and reduce the thickness of the electro-optic effect to increase the modulation speed, enabling modulation speeds to reach over 40 GHz.

[0004] However, the staff found that, due to the limitations of the material itself, lithium niobate thin-film electro-optic modulators could not achieve higher modulation speeds. Summary of the Invention

[0005] In order to achieve higher modulation speed and better modulation effect for optical modulation signals, this application discloses an optical pulse processing system.

[0006] The first aspect of this application discloses a light pulse processing system, the light pulse processing system comprising:

[0007] The first reference optical pulse source is used to generate a periodic optical pulse sequence;

[0008] A first intensity modulator connected in series with the first reference optical pulse source is used to receive the optical pulse sequence and a low-speed optical pulse signal carrying data information to be processed, and to modulate the optical pulse sequence with the low-speed optical pulse signal to obtain a standard optical pulse signal carrying the data information to be processed, wherein the time interval between adjacent optical pulse centers of the standard optical pulse signal is equal to the period of the optical pulse sequence.

[0009] A high-speed signal acquisition device connected in series with the first intensity modulator is used to acquire the high-speed signal corresponding to the standard optical pulse signal by performing a resonant operation on the standard optical pulse signal;

[0010] A second intensity modulator connected in series with the high-speed signal acquisition device is used to select a high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device.

[0011] Optionally, the high-speed signal acquisition device includes: a first delay modulator and a first optical resonant cavity;

[0012] The first delay modulator is connected in series with the first intensity modulator to sequentially delay each optical pulse in the standard optical pulse signal. The delay time increases arithmetically in sequence, and the difference between the delay times of adjacent optical pulses is equal, thereby obtaining the first delay signal.

[0013] The first optical resonant cavity is used to sequentially acquire each optical pulse of the first delayed signal, and to resonate and cycle the optical pulses entering the first optical resonant cavity at different times to acquire a superimposed signal; the difference between the time it takes for the optical pulse to cycle once in the first optical resonant cavity and the time interval between the centers of adjacent optical pulses of the first delayed signal is less than the period of the optical pulse sequence and greater than the pulse width of each optical pulse in the optical pulse sequence, and the superimposed signal is the high-speed signal corresponding to the standard optical pulse signal.

[0014] Alternatively, the high-speed signal acquisition device may include: a second optical resonant cavity;

[0015] The second optical resonant cavity is used to resonate and cycle the standard optical pulse signal after receiving it, and output the resonant and cycled optical pulse signal. The resonant and cycled optical pulse signal is a high-speed signal corresponding to the standard optical pulse signal. The time for the standard optical pulse signal to cycle once in the second optical resonant cavity is less than the time interval between the centers of adjacent optical pulses of the standard optical pulse signal. The difference between the time for the standard optical pulse signal to cycle once in the second optical resonant cavity and the time interval between the centers of adjacent optical pulses of the standard optical pulse signal is less than the period of the optical pulse sequence and greater than the pulse width of each optical pulse in the optical pulse sequence.

[0016] Optionally, the first optical resonant cavity is connected in series with the first delay modulator, or the first delay modulator is located inside the first optical resonant cavity.

[0017] Optionally, the optical pulse processing system further includes:

[0018] The third optical resonant cavity is used to receive high-speed optical pulse signals carrying data information to be processed, and to cycle through each optical pulse of the high-speed optical pulse signal;

[0019] The second reference optical pulse source is used to generate a periodic second optical pulse sequence;

[0020] The second delay modulator connected in series with the second reference optical pulse source is used to delay each optical pulse in the second optical pulse sequence to obtain a second delayed signal. The delay time increases arithmetically in sequence, the time difference between the delays of adjacent optical pulses is equal, and the sum of the time interval between the centers of adjacent optical pulses in the high-speed optical pulse signal and the time for the optical pulse to circulate once in the third optical resonant cavity is equal to the time interval between the centers of adjacent optical pulses in the second delayed signal.

[0021] The first optical switch, which is connected to both the third optical resonator and the second delay modulator, is used to filter the portion of the high-speed optical pulse signal output by the third optical resonator that is synchronized with the second delay signal, and form a low-speed optical pulse signal.

[0022] Optionally, the optical pulse processing system further includes:

[0023] The fourth optical resonant cavity is used to receive high-speed optical pulse signals carrying data information to be processed, and to cycle through each optical pulse of the high-speed optical pulse signal;

[0024] The fourth reference optical pulse source is used to generate a periodic fourth optical pulse sequence;

[0025] A second optical switch is connected to the fourth optical resonant cavity and the fourth reference optical pulse source, respectively. The second optical switch is used to filter the high-speed optical pulse signal output by the fourth optical resonant cavity that is synchronized with the fourth optical pulse sequence to form a low-speed optical pulse signal. The sum of the time interval between adjacent pulse centers in the high-speed optical pulse signal and the time for the optical pulse to circulate once in the fourth optical resonant cavity is equal to the time interval between adjacent optical pulse centers in the fourth optical pulse sequence.

[0026] Optionally, the first optical switch is an optical switch employing frequency doubling or frequency combining.

[0027] Optionally, the optical resonant cavity in the optical pulse processing system is provided with a gain medium to compensate for the intensity of the optical pulse. The optical resonant cavity in the optical pulse processing system includes a first optical resonant cavity, a second optical resonant cavity, and / or a third optical resonant cavity.

[0028] Optionally, an intensity attenuation modulator is connected in series between the first delay modulator and the first optical resonant cavity. The intensity attenuation modulator attenuates the intensity of the optical pulses in the first delay signal sequentially, with the attenuation intensity decreasing proportionally in sequence.

[0029] Optionally, a third intensity modulator is provided between the second reference optical pulse source and the second delay modulator. The third intensity modulator is used to compensate for the optical pulse intensity of the high-speed optical pulse signal output in the third optical resonant cavity.

[0030] Optionally, the optical resonator in the optical pulse processing system employs dispersion compensation technology.

[0031] A second aspect of this application discloses a light pulse processing method, which is applied to the light pulse processing system of the first aspect of this application. The light pulse processing method includes:

[0032] The first reference optical pulse source in the optical pulse processing system transmits a periodic optical pulse sequence to the first intensity modulator in the optical pulse processing system, and simultaneously inputs a low-speed optical pulse signal carrying the data information to be processed into the first intensity modulator.

[0033] The first intensity modulator modulates the optical pulse sequence to obtain a standard optical pulse signal carrying the data information to be processed; the time interval between the centers of adjacent optical pulses of the standard optical pulse signal is equal to the period of the optical pulse sequence.

[0034] The first intensity modulator transmits the standard optical pulse signal to the high-speed signal acquisition device, and the high-speed signal acquisition device acquires the high-speed signal corresponding to the standard optical pulse signal by performing a resonant operation on the standard optical pulse signal;

[0035] The high-speed signal acquisition device transmits the high-speed signal to the second intensity modulator, which selects a high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device.

[0036] Optionally, the high-speed signal acquisition device includes: a first delay modulator and a first optical resonant cavity;

[0037] The high-speed signal acquisition device acquires the high-speed signal corresponding to the standard optical pulse signal, including:

[0038] After the first delay modulator acquires the standard optical pulse signal, it sequentially performs delay processing on each optical pulse in the standard optical pulse signal. The delay time increases arithmetically in sequence, and the difference between the delay times of adjacent optical pulses is equal, thereby acquiring the first delay signal.

[0039] The first delay modulator sequentially couples the optical pulses of the first delayed signal into the first optical resonant cavity, and the first optical resonant cavity resonates and cycles to obtain a superimposed signal. The difference between the time it takes for the optical pulse to cycle once in the first optical resonant cavity and the time interval between the centers of adjacent optical pulses of the first delayed signal is less than the period of the optical pulse sequence and greater than the width of each optical pulse in the optical pulse sequence. The superimposed signal is the high-speed signal corresponding to the standard optical pulse signal.

[0040] Alternatively, the high-speed signal acquisition device may include: a second optical resonant cavity;

[0041] The high-speed signal acquisition device acquires the high-speed signal corresponding to the standard optical pulse signal, including:

[0042] After acquiring the standard optical pulse signal, the second optical resonant cavity resonates the standard optical pulse signal in a circular motion and outputs a circularly circulated optical pulse signal. The circularly circulated optical pulse signal is a high-speed signal corresponding to the standard optical pulse signal. The time taken for the standard optical pulse signal to complete one cycle in the second optical resonant cavity is less than the time interval between the centers of adjacent optical pulses of the standard optical pulse signal. Furthermore, the difference between the time taken for the standard optical pulse signal to complete one cycle in the second optical resonant cavity and the time interval between the centers of adjacent optical pulses of the standard optical pulse signal is less than the period of the optical pulse sequence and greater than the pulse width of each optical pulse in the optical pulse sequence.

[0043] Optionally, the optical pulse processing method further includes:

[0044] The third optical resonant cavity in the optical pulse processing system receives a high-speed optical pulse signal carrying data information to be processed, and cycles through each optical pulse of the high-speed optical pulse signal.

[0045] The second reference optical pulse source in the optical pulse processing system generates a periodic second optical pulse sequence and transmits the second optical pulse sequence to the second delay modulator;

[0046] The second delay modulator in the optical pulse processing system sequentially delays each optical pulse in the optical pulse sequence to obtain a second delayed signal. The delay time increases arithmetically, the time difference between the delays of adjacent optical pulses is equal, and the sum of the time interval between the centers of adjacent optical pulses in the high-speed optical pulse signal and the time it takes for the optical pulse to circulate once in the third optical resonant cavity is equal to the time interval between the centers of adjacent optical pulses in the second delayed signal.

[0047] The high-speed optical pulse signal in the third optical resonant cavity is coupled out to the first optical switch, and the second delay signal is input to the first optical switch. The first optical switch filters the part of the high-speed optical pulse signal coupled out from the third optical resonant cavity that is synchronized with the second delay signal to form a low-speed optical pulse signal.

[0048] Optionally, the optical pulse processing method further includes:

[0049] The fourth reference optical pulse source in the optical pulse processing system generates a periodic fourth optical pulse sequence.

[0050] After the fourth optical resonator in the optical pulse processing system acquires the high-speed optical pulse signal carrying the data information to be processed, the fourth optical resonator cycles through each optical pulse of the high-speed optical pulse signal within the fourth optical resonator.

[0051] The high-speed optical pulse signal in the fourth optical resonant cavity is coupled to the second optical switch. The fourth optical pulse sequence is input to the second optical switch. The second optical switch filters the portion of the high-speed optical pulse signal output from the fourth optical resonant cavity that is synchronized with the fourth optical pulse sequence to form a low-speed optical pulse signal. The time interval between adjacent pulse centers in the high-speed optical pulse signal and the time it takes for the optical pulse to circulate once in the fourth optical resonant cavity are equal to the time interval between adjacent optical pulse centers in the fourth optical pulse sequence.

[0052] The beneficial effects of this application are:

[0053] In this application, a first reference optical pulse source serves as a time reference for outputting a periodic optical pulse sequence. The low-speed optical pulse signal to be processed and the optical pulse sequence are simultaneously input to a first intensity modulator. The low-speed optical pulse signal acts as a control signal, modulating the intensity of the optical pulse sequence to obtain a standard optical pulse signal. The time interval between the centers of adjacent optical pulses in the standard optical pulse signal and the optical pulse sequence is the same. The intensity of the standard optical pulse signal reflects the data information carried by the low-speed signal. The standard optical pulse signal is input to a high-speed signal acquisition device, which performs a resonant operation on the standard optical pulse signal. Subsequently, a second intensity modulator selects the high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device, thereby acquiring the high-speed optical pulse signal. Furthermore, this application can increase the modulation speed by adjusting the high-speed signal acquisition device, thereby facilitating the achievement of higher modulation speeds and better modulation effects. Attached Figure Description

[0054] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments are briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0055] Figure 1 This application provides a schematic diagram of the structure of an optical pulse processing system;

[0056] Figure 2 The optical pulse sequence output by the first basic optical pulse source provided in this application;

[0057] Figure 3 for Figure 1 A schematic diagram of the optical pulse processing system after the medium- and high-speed signal acquisition device is disassembled;

[0058] Figure 4 for Figure 1 A schematic diagram of another optical pulse processing system after the medium- and high-speed signal acquisition device is split up;

[0059] Figure 5 The first intensity modulator provided in this application provides a sequence of optical pulses input before modulation;

[0060] Figure 6 The standard optical pulse signal provided in this application is modulated by the first intensity modulator and output.

[0061] Figure 7 A schematic diagram of the first delay signal provided in this application;

[0062] Figure 8 A schematic diagram of the optical pulse circulation in the first optical resonant cavity provided in this application;

[0063] Figure 9 A comparison diagram of the duration of the input optical pulse signal and the output optical pulse signal of the first optical resonator provided in this application;

[0064] Figure 10 A schematic diagram of a high-speed optical pulse signal modulated into a low-speed optical pulse signal in an optical pulse processing system provided in this application;

[0065] Figure 11 The signal sequence output by the third optical resonator provided in this application;

[0066] Figure 12 A schematic diagram of the first optical switch using a PPLN crystal provided in this application;

[0067] Figure 13 A schematic diagram of the signal sequences S1-S8 provided in this application;

[0068] Figure 14 The second delay signal provided in this application consists of optical pulses P′1-P′. N A schematic diagram;

[0069] Figure 15 This is a schematic diagram of the first optical switch after frequency combining provided in this application;

[0070] Figure 16 This is a schematic diagram of another optical pulse processing system provided in this application;

[0071] Figure 17 This is a schematic diagram of an optical pulse processing system provided in Embodiment 2 of this application;

[0072] Figure 18 This is a flowchart illustrating a light pulse processing method provided in this application.

[0073] Explanation of reference numerals in the attached figures: 100, First reference optical pulse source; 101, First intensity modulator; 102, First delay modulator; 103, First optical resonant cavity; 104, Second intensity modulator; 105, High-speed signal acquisition device; 200, Second reference optical pulse source; 201, Third intensity modulator; 202, Second delay modulator; 203, Third optical resonant cavity; 204, First optical switch; 300, Third reference optical pulse source; 301, Fourth intensity modulator; 302, Third delay modulator; 303, Fifth optical resonant cavity; 304, Sixth optical resonant cavity; 305, Fifth intensity modulator; 306, Third optical switch. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0075] Example 1:

[0076] The first embodiment of this application discloses a light pulse processing system, referring to... Figure 1 The optical pulse processing system includes:

[0077] The first reference optical pulse source 100 is used to generate a periodic optical pulse sequence; in this application, the period of the optical pulse sequence is usually much longer than the pulse width of the optical pulse.

[0078] A first intensity modulator 101 connected in series with the first reference optical pulse source 100 is used to receive the optical pulse sequence and a low-speed optical pulse signal carrying data information to be processed, and to modulate the optical pulse sequence with the low-speed optical pulse signal to obtain a standard optical pulse signal carrying data information to be processed; the time interval between adjacent optical pulse centers of the standard optical pulse signal is equal to the period of the optical pulse sequence.

[0079] The high-speed signal acquisition device 105 connected in series with the first intensity modulator 101 is used to acquire the high-speed signal corresponding to the standard optical pulse signal by performing a resonant operation on the standard optical pulse signal.

[0080] The second intensity modulator 104, connected in series with the high-speed signal acquisition device 105, is used to select a high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device 105.

[0081] In this application, the first reference optical pulse source 100 serves as a time reference for outputting a periodic optical pulse sequence. The low-speed optical pulse signal to be processed and the optical pulse sequence are simultaneously input to the first intensity modulator 101. The low-speed optical pulse signal acts as a control signal, modulating the intensity of the optical pulse sequence to obtain a standard optical pulse signal. The intensity of the standard optical pulse signal reflects the data information carried by the low-speed signal. After the standard optical pulse signal is input to the high-speed signal acquisition device 105, the high-speed signal acquisition device 105 performs a resonant operation on the standard optical pulse signal. Subsequently, the second intensity modulator 104 selects the high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device 105, thereby acquiring the high-speed optical pulse signal. Since the high-speed signal acquisition device 105 continuously outputs optical pulses, the second intensity modulator 104 filters out the high-speed optical pulse signal carrying complete information from the signal output by the high-speed acquisition device 105. Furthermore, this application can improve the modulation speed through the high-speed signal acquisition device 105, thereby facilitating the achievement of higher modulation speeds and better modulation effects.

[0082] Furthermore, the optical pulse processing system provided in this application embodiment can increase the modulation speed to different degrees according to actual needs. For example, under one requirement, the modulation speed can be increased from 1MHz to 10GHz, and under another requirement, the modulation speed can be increased from 1MHz to 50GHz, thereby meeting different needs.

[0083] Specifically, the first reference optical pulse source 100 serves as the time reference of this application and is used to output a periodic optical pulse sequence with equal time intervals, denoted as T. s The optical pulse sequence is as follows Figure 2 As shown. The first reference optical pulse source 100 can be a picosecond mode-locked laser or a femtosecond mode-locked laser. Figure 2 In the diagram, the horizontal axis represents time, and the vertical axis represents the intensity of the light pulse.

[0084] Each light pulse in the periodic light pulse sequence is numbered, and the N light pulses are denoted as P1, P2, P3, ..., P4. N One of the light pulses is denoted as P. i 1 ≤ i ≤ N. The N light pulses have equal pulse widths; for example, the pulse width is the full width at half maximum (FWHM) = T. p Furthermore, the times corresponding to the centers of each optical pulse are T1, T2, T3, ..., T... N The time corresponding to the center of a certain light pulse is denoted as T. i That is, T i -T i-1 =T s T sThe following conditions must be met: T s Much greater than T p For example, T s It is T p More than 100 times. In this application, pulse width can also be referred to as pulse width or optical pulse width.

[0085] Specifically, in one feasible implementation, see [link to relevant documentation]. Figure 3 The high-speed signal acquisition device 105 includes a first delay modulator 102 and a first optical resonant cavity 103; in this implementation, the first optical resonant cavity 103 is the optical resonant cavity in the optical pulse processing system.

[0086] The first delay modulator 102 is connected in series with the first intensity modulator 101 to sequentially delay each optical pulse in the standard optical pulse signal. The delay time increases arithmetically in sequence, and the difference between the delay times of adjacent optical pulses is equal, thereby obtaining the first delay signal.

[0087] The first optical resonant cavity 103 is used to sequentially acquire each optical pulse of the first delayed signal, and to resonate and cycle the optical pulses entering the first optical resonator 103 at different times to acquire a superimposed signal; the difference between the time it takes for the optical pulse to cycle once in the first optical resonant cavity 103 and the time interval between the centers of adjacent optical pulses of the first delayed signal is less than the period of the optical pulse sequence and greater than the width of each optical pulse in the optical pulse sequence, and the superimposed signal is the high-speed signal corresponding to the standard optical pulse signal;

[0088] The superimposed signal is transmitted to the second intensity modulator 104.

[0089] Furthermore, the first optical resonant cavity 103 is connected in series with the first delay modulator 102, or the first delay modulator 102 is located inside the first optical resonant cavity 103.

[0090] Furthermore, the time it takes for the optical pulse signal to circulate once in the first optical resonant cavity 103 is denoted as T. c And T c =T s That is, the time T for the optical pulse signal to complete one cycle in the first optical resonant cavity 103. c The time interval T between the centers of two adjacent light pulses in the light pulse sequence s They are equal. Additionally, T c The numerical value can be changed by adjusting the cavity length or the refractive index of the first optical resonant cavity 103. The delay duration set by the first delay modulator 102 determines the time interval between the centers of adjacent optical pulses in the compressed and modulated high-speed optical pulse signal.

[0091] Alternatively, in another feasible implementation, refer to Figure 4 The high-speed signal acquisition device 105 includes a second optical resonant cavity; in this implementation, the second optical resonant cavity is the optical resonant cavity in the optical pulse processing system.

[0092] The second optical resonant cavity is used to resonate and cycle the standard optical pulse signal after receiving it, and output the resonantly cycled optical pulse signal. The time taken for the standard optical pulse signal to cycle once in the second optical resonant cavity is less than the time interval between the centers of adjacent optical pulses in the standard optical pulse signal. Furthermore, the difference between the time taken for the standard optical pulse signal to cycle once in the second optical resonant cavity and the time interval between the centers of adjacent optical pulses in the standard optical pulse signal is less than the period of the optical pulse sequence, but greater than the width of each optical pulse in the optical pulse sequence.

[0093] The optical pulse signal output from the second optical resonator is transmitted to the second intensity modulator 104, which selects a high-speed optical pulse signal carrying complete information from the output optical pulse signal. In this implementation, the first delay modulator is removed, simplifying the optical pulse processing system while still providing the ability to modulate low-speed optical pulse signals into high-speed optical pulse signals. This implementation achieves the modulation of low-speed optical pulse signals into high-speed optical pulse signals by controlling the duration of the optical pulse in the second optical resonator. Furthermore, in this implementation, the modulation speed is changed by replacing the second optical resonator with one of different optical path lengths.

[0094] The following example will further illustrate the proposed solution.

[0095] This application uses light pulse signals to represent the decimal number 0D211. After converting the decimal number 0D211 to binary, it becomes 0B11010011. This application uses the binary number 0B11010011 as an example for illustration.

[0096] The first part of the embodiments of this application is used to modulate a low-speed optical pulse signal into a high-speed optical pulse signal, thereby facilitating subsequent reading, processing and calculation of the high-speed optical pulse signal by photonic chips and other devices.

[0097] The first reference optical pulse source 100 outputs a periodic optical pulse sequence with equal time intervals. This optical pulse sequence and the low-speed optical pulse signal are simultaneously input into the first intensity modulator 101. The modulation period of the first intensity modulator 101 is also T. sThat is, the modulation period of the first intensity modulator 101 is equal to the time interval between the centers of two adjacent optical pulses in the optical pulse sequence. In the first intensity modulator 101, the optical pulses of the optical pulse sequence are modulated according to a binary low-speed optical pulse signal.

[0098] Reference Figure 5 and Figure 6 The eight light pulses are numbered P1, P2, P3, ..., P8 from left to right. A light pulse intensity of 1 represents the digit "1", and a light pulse intensity of 0 represents the digit "0". Alternatively, a light pulse intensity of 1 can represent the digit "0", and a light pulse intensity of 0 can represent the digit "1". This application does not limit this, as long as the difference in light pulse intensity reflects whether the represented digit is "1" or "0". Figure 5 and Figure 6 In the diagram, the horizontal axis represents time, and the vertical axis represents the intensity of the light pulse.

[0099] Specifically, the first intensity modulator 101 can be an optical switch, performing intensity modulation in the order of "11010011". After modulation, a standard optical pulse signal is acquired. The standard optical pulse signal represents the decimal number 0D211 or the binary number 0B11010011. The standard optical pulse signal is as follows: Figure 6 As shown.

[0100] In another feasible implementation, the first intensity modulator 101 employs an acousto-optic or electro-optic intensity modulator. For example, a lithium niobate modulator is used, which changes the polarization state of the input laser according to the input electrical signal, and then uses a polarizer to analyze the laser polarization, attenuating the laser pulse intensity from 0% to 100%, thereby representing the digit "1" or the digit "0".

[0101] After receiving the standard optical pulse signal, the first delay modulator 102 delays each optical pulse of the standard optical pulse signal.

[0102] The delay rules are as follows:

[0103] The delay time length of each optical pulse in a standard optical pulse signal is Td. i , Td i =ΔT×(i-1), and T p <ΔT <T s That is, the value of ΔT is greater than the pulse width T of each light pulse in the light pulse sequence. p At the same time, it is less than the time interval T between the centers of two adjacent light pulses in the light pulse sequence. sThe value of ΔT is larger than the pulse width of each optical pulse in the optical pulse sequence, ensuring that each optical pulse is clearly distinguishable after the delay and preventing multiple optical pulses from becoming indistinguishable when they are close together. The value of ΔT is smaller than the time interval between the centers of two adjacent optical pulses in the optical pulse sequence, ensuring that the duration of the optical pulse is shortened and the modulation speed of the optical pulse is increased.

[0104] Specifically, the first delay modulator 102 can be an acousto-optic or opto-optical delay modulator. For example, a lithium niobate modulator can be used, which changes the refractive index of the material according to the strength of the input electrical signal, thereby changing the optical path and realizing the delay processing of the optical pulse signal.

[0105] After processing by the first delay modulator 102, a periodic first delay signal is obtained. The first delay signal in this application example is as follows: Figure 7 As shown. In Figure 7 In the diagram, the horizontal axis represents time, and the vertical axis represents the light pulse intensity. The dashed lines represent the light pulses of the standard light pulse signal, and the solid lines represent the light pulses in the first delayed signal. Figure 7 It can be seen that the first delayed signal is obtained after each optical pulse of the standard optical pulse signal is delayed according to the delay rule.

[0106] The first optical resonant cavity 103 receives the first delayed signal and performs modulation speed processing on the first delayed signal. The first optical resonant cavity 103 includes a coupling system and an optical circulator. The coupling system is an optical fiber coupler or a waveguide coupler, or is composed of input and output lenses with a certain transmittance.

[0107] In another feasible implementation, the optical circulator is composed of spatial optical elements. For example, a linear, folded, or annular optical circulator made of reflecting mirrors, in which case the coupling system consists of input and output mirrors with a certain transmittance.

[0108] In another feasible implementation, the optical circulator is made of optical fiber. For example, the optical circulator is made of optical fiber, and the coupling system is made of 2×2 beam splitters.

[0109] In another feasible implementation, the optical circulator is composed of a whispering-gallery microcavity. For example, the whispering-gallery microcavity can be fabricated on a silicon-based or lithium niobate-based substrate using microfabrication processes, and a coupling system can be formed by coupling the microcavity with a strip waveguide.

[0110] Specifically, the light pulse of the first delayed signal input to the first optical resonant cavity 103 circulates once in the optical circulator. When it passes through the coupling system, it is superimposed with the light pulse of the next first delayed signal input to the optical circulator and then repeats the circulation in the optical circulator.

[0111] In this application, after the standard optical pulse signal obtained by the first intensity modulator 101 is delayed by the first delay modulator 102, each optical pulse of the first delayed signal is input into the first optical resonant cavity 103, and the newly input optical pulse is superimposed on the tail of the existing optical pulse in the first optical resonant cavity 103, thus forming a new optical pulse sequence.

[0112] Reference Figure 8 The optical pulse P1 is first input into the optical circulator through the coupling system. In the first cycle, there is only one optical pulse. Then, optical pulse P2 is input into the optical circulator through the coupling system. In the second cycle, there are two optical pulses, and so on, with eight optical pulses in the eighth cycle. In this application, the first cycle is denoted as C1, the second cycle as C2, ..., and so on, with the eighth cycle denoted as C8 and the ninth cycle as C9. Figure 8 In the diagram, the horizontal axis represents time, and the vertical axis represents the intensity of the light pulse.

[0113] When optical pulse P1 passes through the coupling system, it is superimposed on the delayed optical pulse P2, forming a two-pulse optical sequence representing the digital information 0B11. This two-pulse sequence is then superimposed on the delayed optical pulse P3. Since the intensity of optical pulse P3 is zero, the superposition still results in two pulses, but with a one-space delay, representing the digital information 0B110. This process continues for eight cycles, resulting in five optical pulses and three spaces in the optical circulator, representing the digital information 0B11010011. At this point, the total duration of the eight-bit optical pulse signal representing the digital information 0B11010011 is less than the original eight-bit low-speed optical pulse signal, thus compressing the duration of the newly formed optical pulse sequence.

[0114] The optical pulse sequence circulating in the first optical resonant cavity 103 will overlap with the optical pulse input to the coupling system when it is output from the coupling system. Therefore, in this application, the input is stopped when the optical circulator reaches the ninth cycle, that is, when C9 begins. The optical pulse sequence of C9 in the optical circulator is consistent with the optical pulse sequence of C8, and the cycle continues until the output of the coupling system.

[0115] The second intensity modulator 104 extracts the optical pulse sequence of C9 from the first optical resonant cavity 103, thereby forming a complete, compressed eight-bit optical pulse sequence, such as... Figure 9 As shown in the figure. The horizontal axis represents time, and the vertical axis represents the light pulse intensity. The left side represents the first delayed signal before it is input to the first optical resonant cavity 103, and the right side represents the high-speed light pulse signal filtered out by the second intensity modulator 104 from the first optical resonant cavity 103.

[0116] In another feasible implementation, frequency modulation of the low-speed optical pulse signal can also be achieved to obtain a high-speed optical pulse signal by removing the first delay modulator 102. When the standard optical pulse signal is obtained through the first intensity modulator 101, the standard optical pulse signal is directly coupled into the second optical resonator. However, it must be ensured that the time for the optical pulse to circulate once in the second optical resonator is less than the time interval between the centers of adjacent optical pulses of the standard optical pulse signal; it must also be ensured that the difference between the time for the optical pulse to circulate once in the second optical resonator and the time interval between the centers of adjacent optical pulses of the standard optical pulse signal is less than the period of the optical pulse sequence and greater than the width of the optical pulse. The optical pulse signal output from the second optical resonator is transmitted to the second intensity modulator 104. This configuration can also compress the low-speed optical pulse signal into a high-speed optical pulse signal, but the change in modulation speed must be achieved by replacing the second optical resonator with a different optical path. In addition, in this application, the first optical resonator and / or the second optical resonator in the optical pulse processing system are provided with a gain medium to compensate for the intensity of the optical pulse.

[0117] The above describes the configuration for compressing low-speed optical pulse signals to form high-speed optical pulse signals. However, the time it takes for an optical pulse to circulate once in the first optical resonant cavity 103 is less than the time interval between the centers of adjacent optical pulses in the first delayed signal; the difference between the time it takes for an optical pulse to circulate once in the first optical resonant cavity 103 and the time interval between the centers of adjacent optical pulses in the first delayed signal is greater than the period of the optical pulse sequence. This configuration allows for the processing of low-speed optical pulse signals to obtain even lower-speed optical pulse signals; that is, this configuration allows for the processing of high-speed optical pulse signals to obtain low-speed optical pulse signals. Since low-speed optical pulse signals have advantages such as ease of reading, storage, and processing, it is sometimes necessary to modulate high-speed optical pulse signals into low-speed optical pulse signals. To meet the requirement of modulating high-speed optical pulse signals into low-speed optical pulse signals, this application discloses the following embodiments:

[0118] This embodiment is used to modulate a high-speed optical pulse signal into a low-speed optical pulse signal. In this embodiment, refer to... Figure 10 The optical pulse processing system further includes:

[0119] The third optical resonant cavity 203 is used to receive high-speed optical pulse signals carrying data information to be processed, and to cycle through each optical pulse of the high-speed optical pulse signal; in this implementation, the third optical resonant cavity 203 is the optical resonant cavity in the optical pulse processing system.

[0120] The second reference optical pulse source 200 is used to generate a periodic second optical pulse sequence; the second delay modulator 202, connected in series with the second reference optical pulse source 200, is used to delay each optical pulse in the second optical pulse sequence, with the delay time increasing arithmetically in sequence and the time difference between the delays of adjacent optical pulses being equal, thereby obtaining a second delayed signal; the sum of the time interval between the centers of adjacent optical pulses in the high-speed optical pulse signal and the time it takes for the optical pulse to cycle once in the third optical resonant cavity 203 is equal to the time interval between the centers of adjacent optical pulses in the second delayed signal;

[0121] The first optical switch 204, which is connected to the third optical resonator 203 and the second delay modulator 202, is used to filter the part of the high-speed optical pulse signal output by the third optical resonator 203 that is synchronized with the second delay signal to form a low-speed optical pulse signal.

[0122] The second delay modulator 202 can also be placed in the second optical resonant cavity 203.

[0123] The second reference light pulse source 200 has the same basic principle and function as the first reference light pulse source 100, and is used to generate a periodic second light pulse sequence. In this application, for ease of understanding, the intensity of all light pulses in the light pulse sequence can be set to 1.

[0124] The specific process of the optical pulse signal being modulated from high speed to low speed is as follows:

[0125] After the high-speed optical pulse signal to be processed is input into the third optical resonator 203, the high-speed optical pulse signal begins to circulate in the third optical resonator 203, and then is output from the third optical resonator 203 at time intervals of T. c The signal sequences are denoted as S1, S2, S3, ..., S... i ... S N Since the signal sequence is output from the same output port of the third optical resonator 203, the shape of the signal sequence remains consistent, such as... Figure 11 As shown. In Figure 11 In the diagram, the horizontal axis represents time, and the vertical axis represents the intensity of the light pulse.

[0126] The second optical pulse sequence generated by the second reference optical pulse source 200 enters the second delay modulator 202 for delay processing, and the delay processing method is the same as that of the first delay modulator 102 described above. Through the delay processing of the second delay modulator 202, a second delayed signal is obtained, and each optical pulse of the second delayed signal is sequentially denoted as P′1, P′2, ..., P′. N .

[0127] Signal sequence S1-S NThe second delayed signal arrives simultaneously with the first optical switch 204. Each optical pulse of the second delayed signal controls the first optical switch 204, adjusting the signal sequence S1-S2. N The optical pulses in the signal are selected, and an optical pulse signal synchronized with each optical pulse of the second delay signal is output. This optical pulse signal is the low-speed optical pulse signal. The first optical switch 204 can be a frequency-doubling or frequency-combining optical switch.

[0128] The following section uses a frequency-combining optical switch to further illustrate the modulation of a high-speed optical pulse signal into a low-speed optical pulse signal.

[0129] Taking an 8-bit optical pulse signal as an example, the wavelength of a high-speed optical pulse signal is 1550nm, i.e., the signal sequence S1-S2... N The wavelength of the first light pulse is 1550nm; the wavelength of the light pulse sequence output by the second reference light pulse source 200 is 1064nm, so the light pulses P′1-P′ of the second delay signal output by the second delay modulator 202 are... N The wavelength is 1064nm.

[0130] In practical applications, nonlinear barium metaborate (BBO), lithium triborate (LBO), potassium titanium phosphate (KTP), periodically polarized lithium niobate (PPLN) crystals (hereinafter referred to as PPLN crystals), and periodically polarized magnesium oxide-doped lithium niobate (PPLT) crystals are used as frequency combining materials. In this application, the first optical switch for frequency combining is selected from periodically polarized lithium niobate (PPLN) crystals, with a polarization period of 11.9 μm, a crystal thickness of 1 mm, and a length of 10 mm.

[0131] Reference Figure 10 and Figure 12 The signal sequence S1-S output by the third optical resonator 203 N The 1550nm optical pulse and the second delayed signal P′1-P′ output by the second delay modulator 202. N A 1064nm light pulse undergoes a second-order nonlinear interaction in a periodically polarized lithium niobate crystal (PPLN), resulting in a 631nm signal light pulse. Light pulses of other wavelengths are separated by beam splitting.

[0132] Reference Figure 13 , Figure 14 and Figure 15In the PPLN combining process, a non-zero combined light can only be generated when the light pulse intensities of the two input light pulses are both non-zero. It can be seen that the light pulse peaks of S1 and P'1 are aligned, resulting in an output of 1; the light pulse peaks of S2 and P'2 are aligned, resulting in an output of 1; the light pulse peaks of S3 and P'3 are aligned, and since the light pulse intensity at the corresponding position of P'3 in S3 is 0, the output is 0; and so on. The intensity of the output light pulse of the combined light represents the signal 0B11010011, and the time interval between adjacent light pulses is widened, thus changing the modulation speed of the light pulses from high speed to low speed.

[0133] Furthermore, during actual operation, the optical pulse signal experiences losses as it circulates within the optical resonant cavity. These losses include those inherent to the optical circulator itself, such as absorption, scattering, and diffraction. These losses cause the power of the optical pulse signal to decrease to α times the original power after one cycle. c The multiple can be expressed by the formula:

[0134] P i+1 =α c P i

[0135] The loss also includes the coupling output loss of the coupling system to the optical pulse signal. This loss causes the power of the optical pulse signal to decrease to α times the original optical pulse signal power after one cycle in the optical resonant cavity. o The multiple can be expressed by a formula;

[0136] P i+1 =α o P i

[0137] Therefore, after the optical pulse signal circulates once within the optical resonant cavity, the transformed power can be expressed by the formula:

[0138] P i+1 =α c α o P i

[0139] In one feasible implementation, to maintain the equal intensity of the optical pulses coupled out by the first optical resonator 103 each time, an additional intensity attenuation modulator can be added between the first delay modulator 102 and the first optical resonator 103 before the first delay signal is input to the first optical resonator 103. The intensity attenuation modulator is used to sequentially attenuate the intensity of each optical pulse of the first delay signal. The power of the optical pulses after intensity attenuation of the first delay signal can be expressed by the formula:

[0140] P i =(α c α o )i P0

[0141] Similarly, in order to compensate for the intensity attenuation of the optical pulse coupled out by the third optical resonator 203, a third intensity modulator 201 can be added between the second reference optical pulse source 200 and the second delay modulator 202.

[0142] In another feasible implementation, to optimize the losses caused by the optical resonator, which lead to attenuation of the optical pulse as it circulates within the optical resonator, this application adds a gain medium to the optical resonator to amplify the power of the optical pulse. In this case, there is no need to add an intensity modulator. For example, a solid-state laser gain medium can be used. The solid-state laser gain medium includes Nd:YAG (neodymium-doped yttrium aluminum garnet), Nd:YVO4 (neodymium-doped yttrium vanadate), and Ti:sapphire (titanium-doped sapphire).

[0143] In another feasible implementation, the optical resonant cavity employs an optical fiber gain material. The optical fiber gain material includes ytterbium-doped fiber, erbium-doped fiber, and holmium-doped fiber.

[0144] In another feasible implementation, the optical resonant cavity employs a semiconductor gain material. The semiconductor gain material includes gallium arsenide (GaAs), cadmium sulfide (CdS), indium phosphide (InP), and zinc sulfide (ZnS).

[0145] In another feasible implementation, the optical resonant cavity employs a second-order nonlinear gain medium. The second-order nonlinear gain medium includes barium metaborate (BBO), lithium triborate (LBO), potassium titanium oxyphosphate (KTP), lithium niobate (LiNbO3), and lithium tantalate (LiTaO3).

[0146] In another feasible implementation, the optical resonant cavity employs a third-order nonlinear gain medium. The third-order nonlinear gain medium includes silicon (Si), silicon dioxide (SiO2), and glass.

[0147] In one feasible implementation, the dispersion phenomenon in the optical resonant cavity causes the optical pulse to broaden, affecting the compression duration and thus the modulation speed. To avoid the broadening of the optical pulse, this application employs dispersion compensation techniques in the optical resonant cavity, such as using low-dispersion materials, positive and negative dispersion compensation techniques, or grating compensation techniques.

[0148] Furthermore, the optical pulse processing system of this application can be configured to operate in series or parallel, achieving higher or lower modulation speeds and resulting in better performance. Additionally, the first reference optical pulse source 100 and the second reference optical pulse source 200 in this application can share a single reference optical pulse source, referred to here as the third reference optical pulse source 300; the first delay modulator 102 and the second delay modulator 202 can share a single delay modulator, referred to here as the third delay modulator 302, such as... Figure 16 As shown.

[0149] Reference Figure 16 This application further discloses an optical pulse processing system. The optical pulse processing system first modulates the low-speed optical pulse signal to be processed in memory into a high-speed optical pulse signal. The high-speed optical pulse signal enters the photonic chip for reading and processing. After the photonic chip completes the processing, the optical pulse processing system modulates the high-speed optical pulse signal back into a low-speed optical pulse signal, thereby storing the low-speed optical pulse signal in memory or other devices.

[0150] This application continues to use the digital information 0B11010011 as an example. The third reference optical pulse source 300 adopts a 1550nm wavelength mode-locked fiber laser to generate an optical pulse with a repetition frequency of 1GHz and a pulse width of T. p (T p A reference optical pulse sequence of 1 ps, with an interval of T between adjacent optical pulses. s T s =1ns, average power 1mW, single-pulse energy 1pJ, peak power 1W.

[0151] A fourth intensity modulator 301, connected in series with the third reference optical pulse source 300, modulates the reference pulse sequence. The function of the fourth intensity modulator 301 is the same as that of the first intensity modulator 101. In this application, the fourth intensity modulator 301 is an electro-optic modulator with a bandwidth of 1G, which modulates the eight optical pulses of the reference optical pulse sequence into an optical pulse sequence 0B11010011, where the number 1 represents that the optical pulse energy is maintained at 1pJ; the number 0 represents that the optical pulse intensity is 0, and the total duration is 8ns.

[0152] A third delay modulator 302, connected in series with the fourth intensity modulator 301, performs delay processing on the optical pulse sequence 0B11010011. In this application, the third delay modulator 302 is a lithium niobate delay modulator, which delays each optical pulse in the optical pulse sequence 0B11010011 by 1 ps in sequence, forming an optical pulse sequence of 1001 ps (i.e., T2-T1 = 1001 ps), 1002 ps (i.e., T3-T2 = 1002 ps), ..., 1007 ps (i.e., T8-T7 = 1007 ps), where T1 represents the center time corresponding to the first data bit in the optical pulse sequence 0B11010011, T2 represents the center time corresponding to the second data bit in the optical pulse sequence 0B11010011, and so on, with T8 representing the center time corresponding to the eighth data bit in the optical pulse sequence 0B11010011.

[0153] The output signal of the third delay modulator 302 is divided into two paths: one path is connected in series with the fifth optical resonant cavity 303, and the other path is connected in series with the third optical switch 306.

[0154] In this application, the fifth optical resonant cavity 303 functions the same as the first optical resonant cavity 103. The fifth optical resonant cavity 303 includes a fifth optical circulator and a fifth coupling system. The fifth optical circulator employs an optical fiber ring, and the optical path length of the optical fiber ring is controlled to be 299.79 mm (i.e., ...). This makes the time for light to circulate once in the cavity 1ns; the fifth coupling system uses a 2×2 beam splitter with a coupling-in / coupling-out ratio of 1000:1, that is, the peak power of a 1W peak power optical pulse input into the fiber ring is 1mW, and the peak power output from the fiber ring is 1μW.

[0155] The delayed optical pulse sequence 0B11010011 is input into the fifth optical resonant cavity 303. When the i-th optical pulse is input, the (i-1)-th optical pulse has already circulated once in the optical resonant cavity. In the optical resonant cavity, the i-th optical pulse lags behind the (i-1)-th optical pulse by 1 ps, where the value of "i-1" ranges from 1 to 8.

[0156] After the 8th optical pulse input ends, a 1ps interval optical pulse train is formed in the fifth optical circulator. This optical pulse train circulates again and is output from the fifth coupling system. The fifth coupling system is connected in series with a fifth intensity modulator 305. The fifth intensity modulator 305 can be an optical switch or other devices. The fifth intensity modulator 305 selects the circulated optical pulse train and forms an 8-bit binary digital information 0B11010011 with a total duration of 8ps and a modulation frequency of 1THz, representing the decimal number 0D211. This 8-bit binary digital information 0B11010011 is the modulated high-speed optical pulse signal.

[0157] High-speed optical pulse signals are input into devices such as photonic chips for reading and processing. After processing, high-speed optical pulse signals of the same rate are output. It is necessary to modulate the high-speed optical pulse signals into low-speed optical pulse signals to complete other operations such as low-speed optical pulse signal storage.

[0158] Taking the digital information 0B11010011 as an example, the high-speed optical pulse signal in this application has a modulation speed of 1THz.

[0159] A high-speed optical pulse signal is input into the sixth optical resonator 304, which has the same specifications as the fifth optical resonator 303. After an 8-bit high-speed optical pulse signal with a total duration of 8 ps is input into the sixth optical resonator 304, the sixth optical resonator outputs a copy of the high-speed optical pulse signal every 1 ns. At this time, the low-speed optical pulse signal input to the fourth intensity modulator 301 is set to 0B11111111, meaning that all optical pulses pass through.

[0160] The reference optical pulse sequence output from the third reference optical pulse source 300 is delayed by the third delay modulator 302, resulting in an output optical pulse sequence with unequal delays. The optical pulse sequence with unequal delays output by the third delay modulator 302, along with the high-speed optical pulse signal and its replica in the sixth optical resonant cavity 304, enters the third optical switch 306 via a beam combiner. In this application, the third optical switch 306 is an optically controlled optical switch, where the optical pulse output from the high-speed optical pulse signal and its replica is selected based on the optical pulse sequence with unequal delays output by the third delay modulator 302, and the output of the optical pulse at the corresponding moment is selected.

[0161] The third optical switch 306 may be made of periodically polarized lithium niobate (PPLN) material, and may be made into a strip waveguide structure through proton exchange, titanium diffusion or thin-film lithium niobate processing technology, and input and output may be realized through optical fiber coupling.

[0162] After the frequency combining process, the optical pulses of two wavelengths, 1550nm and 1064nm, are combined to a wavelength of 631nm. The combined optical pulse is output only when the intensity of both wavelengths is not zero. Finally, a combined optical pulse signal with a total duration of 8ns and a modulation speed of 1GHz is output. This combined optical pulse signal is the obtained low-speed optical pulse signal, which can be stored and subjected to other operations.

[0163] Example 2:

[0164] The second embodiment of this application discloses a light pulse processing system, see [link to relevant documentation]. Figure 17 The optical pulse processing system includes:

[0165] The fourth optical resonant cavity is used to receive high-speed optical pulse signals carrying data information to be processed, and to cycle through each optical pulse of the high-speed optical pulse signal; in this implementation, the fourth optical resonant cavity is the optical resonant cavity in the optical pulse processing system.

[0166] The fourth reference optical pulse source is used to generate a periodic fourth optical pulse sequence;

[0167] A second optical switch is connected to the fourth optical resonant cavity and the fourth reference optical pulse source, respectively. The second optical switch is used to filter the high-speed optical pulse signal output by the fourth optical resonant cavity that is synchronized with the third optical pulse sequence to form a low-speed optical pulse signal. The sum of the time interval between adjacent pulse centers in the high-speed optical pulse signal and the time for the optical pulse to circulate once in the fourth optical resonant cavity is equal to the time interval between adjacent optical pulse centers in the fourth optical pulse sequence.

[0168] In one feasible implementation, the second optical switch is an optical switch employing frequency doubling or frequency combining.

[0169] Compared to Embodiment 1, this embodiment eliminates the second delay modulator, simplifying the optical pulse processing system while still providing the ability to modulate high-speed optical pulse signals into low-speed optical pulse signals. This embodiment also achieves the modulation of high-speed optical pulse signals into low-speed optical pulse signals by controlling the duration of the optical pulses used in the fourth optical resonator. However, the modulation speed is determined by the time it takes for the optical pulses to complete one cycle in the fourth optical resonator and the time interval between the centers of adjacent optical pulses in the optical pulse sequence. Changing the modulation speed requires replacing the fourth optical resonator with one of different optical path lengths.

[0170] Example 3:

[0171] The third embodiment of this application discloses a light pulse processing method, which is applied to a light pulse processing system disclosed in the first embodiment of this application, with reference to... Figure 18The optical pulse processing method includes:

[0172] The first reference optical pulse source 100 in the optical pulse processing system transmits a periodic optical pulse sequence to the first intensity modulator 101 in the optical pulse processing system, and simultaneously inputs a low-speed optical pulse signal carrying the data information to be processed into the first intensity modulator 101.

[0173] The first intensity modulator 101 modulates the optical pulse sequence to obtain a standard optical pulse signal carrying the data information to be processed; the time interval between adjacent optical pulse centers of the standard optical pulse signal is equal to the period of the optical pulse sequence.

[0174] The first intensity modulator 101 transmits the standard optical pulse signal to the high-speed signal acquisition device 105, and the high-speed signal acquisition device 105 acquires the high-speed signal corresponding to the standard optical pulse signal by performing a resonant operation on the standard optical pulse signal.

[0175] The high-speed signal acquisition device 105 transmits the high-speed signal to the second intensity modulator 104. The second intensity modulator 104 selects a high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device 105, thereby obtaining a high-speed optical pulse signal.

[0176] This application achieves the compression of the duration of the low-speed optical pulse signal by inputting a low-speed optical pulse signal into a high-speed signal acquisition device for resonance operation, and then using a second intensity modulator to filter out the high-speed optical pulse signal carrying complete information. This transforms the low-speed signal into a high-speed signal. Furthermore, this application can modify the high-speed signal acquisition device 105 to increase the modulation speed to different degrees, thereby facilitating the achievement of higher modulation speeds and better modulation effects.

[0177] Furthermore, in the optical pulse processing system, the high-speed signal acquisition device 105 includes: a first delay modulator 102 and a first optical resonant cavity 103;

[0178] The high-speed signal acquisition device 105 acquires the high-speed signal corresponding to the standard optical pulse signal, including:

[0179] After the first delay modulator 102 acquires the standard optical pulse signal, it sequentially performs delay processing on each optical pulse in the standard optical pulse signal. The delay time increases arithmetically in sequence, and the difference between the delay times of adjacent optical pulses is equal, thereby acquiring the first delay signal.

[0180] The first delay modulator 102 sequentially couples the optical pulses of the first delayed signal into the first optical resonant cavity 103. The first optical resonant cavity 103 resonates and cycles to obtain a superimposed signal. The difference between the time it takes for the optical pulse to cycle once in the first optical resonant cavity 103 and the time interval between the centers of adjacent optical pulses of the first delayed signal is less than the period of the optical pulse sequence and greater than the width of each optical pulse in the optical pulse sequence. The superimposed signal is the high-speed signal corresponding to the standard optical pulse signal.

[0181] Alternatively, the high-speed signal acquisition device 105 may include a second optical resonant cavity;

[0182] The high-speed signal acquisition device 105 acquires the high-speed signal corresponding to the standard optical pulse signal, including:

[0183] After acquiring the standard optical pulse signal, the second optical resonant cavity resonates the standard optical pulse signal in a circular motion and outputs a circularly circulated optical pulse signal. The circularly circulated optical pulse signal is a high-speed signal corresponding to the standard optical pulse signal. The time taken for the standard optical pulse signal to complete one cycle in the second optical resonant cavity is less than the time interval between the centers of adjacent optical pulses of the standard optical pulse signal. Furthermore, the difference between the time taken for the standard optical pulse signal to complete one cycle in the second optical resonant cavity and the time interval between the centers of adjacent optical pulses of the standard optical pulse signal is less than the period of the optical pulse sequence and greater than the pulse width of each optical pulse in the optical pulse sequence.

[0184] Furthermore, the optical pulse processing method further includes:

[0185] In the optical pulse processing system

[0186] The third optical resonant cavity 203 in the optical pulse processing system receives a high-speed optical pulse signal carrying data information to be processed, and cycles through each optical pulse of the high-speed optical pulse signal.

[0187] The second reference optical pulse source 200 in the optical pulse processing system generates a periodic second optical pulse sequence and transmits the second optical pulse sequence to the second delay modulator 202;

[0188] The second delay modulator 202 in the optical pulse processing system sequentially performs delay processing on each optical pulse of the optical pulse sequence to obtain a second delay signal. The delay time increases arithmetically in sequence, the time difference between the delays of adjacent optical pulses is equal, and the sum of the time interval between the centers of adjacent optical pulses in the high-speed optical pulse signal and the time for the optical pulse to circulate once in the third optical resonant cavity 203 is equal to the time interval between the centers of adjacent optical pulses in the second delay signal.

[0189] The high-speed optical pulse signal in the third optical resonant cavity 203 is coupled out to the first optical switch 204, and the second delay signal is input to the first optical switch 204. The first optical switch 204 filters the part of the high-speed optical pulse signal coupled out of the third optical resonant cavity 203 that is synchronized with the second delay signal to form a low-speed optical pulse signal.

[0190] Furthermore, the optical pulse processing method further includes:

[0191] In the optical pulse processing system

[0192] The fourth reference optical pulse source in the optical pulse processing system generates a periodic fourth optical pulse sequence.

[0193] After the fourth optical resonator in the optical pulse processing system acquires the high-speed optical pulse signal carrying the data information to be processed, the fourth optical resonator cycles through each optical pulse of the high-speed optical pulse signal within the fourth optical resonator.

[0194] The high-speed optical pulse signal in the fourth optical resonant cavity is coupled to the second optical switch. The fourth optical pulse sequence is input to the second optical switch. The second optical switch filters the portion of the high-speed optical pulse signal output from the fourth optical resonant cavity that is synchronized with the third optical pulse sequence to form a low-speed optical pulse signal. The time interval between adjacent pulse centers in the high-speed optical pulse signal and the time it takes for the optical pulse to circulate once in the fourth optical resonant cavity are equal to the time interval between adjacent optical pulse centers in the third optical pulse sequence.

[0195] The embodiments described above only illustrate the basic implementation of this application. Although the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this application, and these all fall within the protection scope of this application.

Claims

1. A light pulse processing system, comprising: The first reference optical pulse source (100) is used to generate a periodic optical pulse sequence; A first intensity modulator (101) connected in series with the first reference optical pulse source (100) is used to receive the optical pulse sequence and a low-speed optical pulse signal carrying data information to be processed, and to modulate the optical pulse sequence with the low-speed optical pulse signal to obtain a standard optical pulse signal carrying the data information to be processed, wherein the time interval between adjacent optical pulse centers of the standard optical pulse signal is equal to the periodic time of the optical pulse sequence. A high-speed signal acquisition device (105) connected in series with the first intensity modulator (101) is used to acquire the high-speed signal corresponding to the standard optical pulse signal by performing a resonant operation on the standard optical pulse signal; A second intensity modulator (104) connected in series with the high-speed signal acquisition device (105) is used to select a high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device (105); Also includes: The third optical resonant cavity (203) is used to receive high-speed optical pulse signals carrying data information to be processed, and to cycle through each optical pulse of the high-speed optical pulse signal; The second reference optical pulse source (200) is used to generate a periodic second optical pulse sequence; The second delay modulator (202), which is connected in series with the second reference optical pulse source (200), is used to delay each optical pulse in the second optical pulse sequence to obtain a second delayed signal. The delay time increases arithmetically in sequence, the time difference between the delays of adjacent optical pulses is equal, and the sum of the time interval between the centers of adjacent optical pulses in the high-speed optical pulse signal and the time for the optical pulse to circulate once in the third optical resonant cavity (203) is equal to the time interval between the centers of adjacent optical pulses in the second delayed signal. The first optical switch (204), which is connected to the third optical resonator (203) and the second delay modulator (202) at the same time, is used to filter the part of the high-speed optical pulse signal output by the third optical resonator (203) that is synchronized with the second delay signal to form a low-speed optical pulse signal.

2. The optical pulse processing system according to claim 1, characterized in that, The high-speed signal acquisition device (105) includes: a first delay modulator (102) and a first optical resonant cavity (103). The first delay modulator (102) is connected in series with the first intensity modulator (101) to perform delay processing on each optical pulse in the standard optical pulse signal in sequence. The delay time increases arithmetically in sequence, and the difference between the delay times of adjacent optical pulses is equal, so as to obtain the first delay signal. The first optical resonant cavity (103) is used to sequentially acquire each optical pulse of the first delayed signal, and to resonate and cycle the optical pulses entering the first optical resonant cavity (103) at different times to acquire a superimposed signal; the difference between the time of one cycle of the optical pulse in the first optical resonant cavity (103) and the time interval between the centers of adjacent optical pulses of the first delayed signal is less than the period of the optical pulse sequence and greater than the pulse width of each optical pulse in the optical pulse sequence, and the superimposed signal is the high-speed signal corresponding to the standard optical pulse signal; Alternatively, the high-speed signal acquisition device (105) may include: a second optical resonant cavity; The second optical resonant cavity is used to resonate and cycle the standard optical pulse signal after receiving it, and output the resonant and cycled optical pulse signal. The resonant and cycled optical pulse signal is a high-speed signal corresponding to the standard optical pulse signal. The time for the standard optical pulse signal to cycle once in the second optical resonant cavity is less than the time interval between the centers of adjacent optical pulses of the standard optical pulse signal. The difference between the time for the standard optical pulse signal to cycle once in the second optical resonant cavity and the time interval between the centers of adjacent optical pulses of the standard optical pulse signal is less than the period of the optical pulse sequence and greater than the pulse width of each optical pulse in the optical pulse sequence.

3. The optical pulse processing system according to claim 2, characterized in that, The first optical resonant cavity (103) is connected in series with the first delay modulator (102), or the first delay modulator (102) is located inside the first optical resonant cavity (103).

4. The optical pulse processing system according to claim 1, characterized in that, Also includes: The fourth optical resonant cavity is used to receive high-speed optical pulse signals carrying data information to be processed, and to cycle through each optical pulse of the high-speed optical pulse signal; The fourth reference optical pulse source is used to generate a periodic fourth optical pulse sequence; A second optical switch is connected to the fourth optical resonant cavity and the fourth reference optical pulse source, respectively. The second optical switch is used to filter the high-speed optical pulse signal output by the fourth optical resonant cavity that is synchronized with the fourth optical pulse sequence to form a low-speed optical pulse signal. The sum of the time interval between adjacent pulse centers in the high-speed optical pulse signal and the time for the optical pulse to circulate once in the fourth optical resonant cavity is equal to the time interval between adjacent optical pulse centers in the fourth optical pulse sequence.

5. The optical pulse processing system according to claim 1, characterized in that, The first optical switch (204) is an optical switch that uses frequency doubling or frequency combining.

6. The optical pulse processing system according to claim 2, characterized in that, The optical resonant cavity in the optical pulse processing system is equipped with a gain medium to compensate for the intensity of the optical pulse.

7. The optical pulse processing system according to claim 2, characterized in that, An intensity attenuation modulator is connected in series between the first delay modulator (102) and the first optical resonant cavity (103). The intensity attenuation modulator attenuates the light pulses in the first delay signal in sequence, and the intensity attenuation decreases proportionally in sequence.

8. The optical pulse processing system according to claim 1, characterized in that, A third intensity modulator (201) is provided between the second reference optical pulse source (200) and the second delay modulator (202). The third intensity modulator (201) is used to compensate for the optical pulse intensity of the high-speed optical pulse signal output in the third optical resonant cavity (203).

9. The optical pulse processing system according to any one of claims 2 to 4, characterized in that, The optical resonator in the optical pulse processing system employs dispersion compensation technology.

10. A method for processing optical pulses, characterized in that, The optical pulse processing system according to any one of claims 1 to 8 comprises: The first reference optical pulse source (100) in the optical pulse processing system transmits a periodic optical pulse sequence to the first intensity modulator (101) in the optical pulse processing system, and simultaneously inputs a low-speed optical pulse signal carrying the data information to be processed into the first intensity modulator (101). The first intensity modulator (101) modulates the optical pulse sequence to obtain a standard optical pulse signal carrying data information to be processed; the time interval between adjacent optical pulse centers of the standard optical pulse signal is equal to the period of the optical pulse sequence. The first intensity modulator (101) transmits the standard optical pulse signal to the high-speed signal acquisition device (105), and the high-speed signal acquisition device (105) acquires the high-speed signal corresponding to the standard optical pulse signal by performing a resonant operation on the standard optical pulse signal; The high-speed signal acquisition device (105) transmits the high-speed signal to the second intensity modulator (104), and the second intensity modulator (104) selects a high-speed optical pulse signal carrying complete information from the high-speed signal output by the high-speed signal acquisition device (105).

11. The optical pulse processing method according to claim 10, characterized in that, The high-speed signal acquisition device (105) includes: a first delay modulator (102) and a first optical resonant cavity (103). The high-speed signal acquisition device (105) acquires the high-speed signal corresponding to the standard optical pulse signal, including: After the first delay modulator (102) acquires the standard optical pulse signal, it sequentially performs delay processing on each optical pulse in the standard optical pulse signal, with the delay time increasing arithmetically in sequence and the difference between the delay times of adjacent optical pulses being equal, thereby acquiring the first delay signal; The first delay modulator (102) sequentially couples the optical pulses of the first delayed signal into the first optical resonant cavity (103). The first optical resonant cavity (103) resonates and cycles to obtain a superimposed signal. The difference between the time it takes for the optical pulse to cycle once in the first optical resonant cavity (103) and the time interval between the centers of adjacent optical pulses of the first delayed signal is less than the period of the optical pulse sequence and greater than the width of each optical pulse in the optical pulse sequence. The superimposed signal is the high-speed signal corresponding to the standard optical pulse signal. Alternatively, the high-speed signal acquisition device (105) may include: a second optical resonant cavity; The high-speed signal acquisition device (105) acquires the high-speed signal corresponding to the standard optical pulse signal, including: After acquiring the standard optical pulse signal, the second optical resonant cavity resonates the standard optical pulse signal in a circular motion and outputs a circularly circulated optical pulse signal. The circularly circulated optical pulse signal is a high-speed signal corresponding to the standard optical pulse signal. The time taken for the standard optical pulse signal to complete one cycle in the second optical resonant cavity is less than the time interval between the centers of adjacent optical pulses of the standard optical pulse signal. Furthermore, the difference between the time taken for the standard optical pulse signal to complete one cycle in the second optical resonant cavity and the time interval between the centers of adjacent optical pulses of the standard optical pulse signal is less than the period of the optical pulse sequence and greater than the pulse width of each optical pulse in the optical pulse sequence.

12. The optical pulse processing method according to claim 10, characterized in that, Also includes: The third optical resonant cavity (203) in the optical pulse processing system receives a high-speed optical pulse signal carrying data information to be processed, and cycles through each optical pulse of the high-speed optical pulse signal. The second reference optical pulse source (200) in the optical pulse processing system generates a periodic second optical pulse sequence and transmits the second optical pulse sequence to the second delay modulator (202). The second delay modulator (202) in the optical pulse processing system sequentially performs delay processing on each optical pulse of the optical pulse sequence to obtain a second delay signal. The delay time increases arithmetically in sequence, the time difference between the delays of adjacent optical pulses is equal, and the sum of the time interval between the centers of adjacent optical pulses in the high-speed optical pulse signal and the time for the optical pulse to circulate once in the third optical resonant cavity (203) is equal to the time interval between the centers of adjacent optical pulses in the second delay signal. The high-speed optical pulse signal in the third optical resonant cavity (203) is coupled out to the first optical switch (204), and the second delay signal is input to the first optical switch (204). The first optical switch (204) filters out the part of the high-speed optical pulse signal coupled out of the third optical resonant cavity (203) that is synchronized with the second delay signal to form a low-speed optical pulse signal.

13. The optical pulse processing method according to claim 10, characterized in that, Also includes: The fourth reference optical pulse source in the optical pulse processing system generates a periodic fourth optical pulse sequence. After the fourth optical resonator in the optical pulse processing system acquires the high-speed optical pulse signal carrying the data information to be processed, the fourth optical resonator cycles through each optical pulse of the high-speed optical pulse signal within the fourth optical resonator. The high-speed optical pulse signal in the fourth optical resonant cavity is coupled to the second optical switch. The fourth optical pulse sequence is input to the second optical switch. The second optical switch filters the portion of the high-speed optical pulse signal output from the fourth optical resonant cavity that is synchronized with the fourth optical pulse sequence to form a low-speed optical pulse signal. The time interval between adjacent pulse centers in the high-speed optical pulse signal and the time it takes for the optical pulse to circulate once in the fourth optical resonant cavity are equal to the time interval between adjacent optical pulse centers in the fourth optical pulse sequence.

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