Optical system response waveform modulation method, device, system and readable medium

Abstract

The present application discloses a response waveform modulation method, device, system and readable medium of an optical system, wherein the optical system comprises a plurality of cascaded optical elements with periodic response and a plurality of phase modulators respectively arranged on each of the optical elements; the method comprises: obtaining a target translation amount of the response waveform of the optical system and a free spectrum range (FSR) length of the response waveform of each of the plurality of optical elements; determining a phase modulation amount of each of the plurality of optical elements according to the target translation amount of the response waveform of the optical system, each of the FSR lengths and a preset translation algorithm; outputting the determined plurality of phase modulation amounts respectively to corresponding phase modulators, so as to modulate the response waveform of each of the optical elements according to the plurality of phase modulation amounts through the plurality of phase modulators, thereby enabling the response waveform of the optical system to be linearly translated to a large extent within a very large range, i.e., within the total FSR.

Description

Technical Field

[0001] The present application relates to the field of optical technology, and in particular, to a response waveform modulation method, device, system and readable medium of an optical system. Background Art

[0002] Transmission response is a fundamental indicator that describes the transmission capability of an optical system for optical signals. It reveals the influence of the optical system on the different frequency components of the optical signal. Therefore, in the entire field of optical engineering (including integrated optics, fiber optics or free space optics, etc.), the design and modulation of the transmission response of the optical system is one of the most basic and important links.

[0003] Generally speaking, the transmission response of an optical system is static in the spectral domain (i.e., wavelength domain or wavenumber domain); and through some technical means, such as using mechanical structures to modulate the position of prisms or adjusting the effective refractive index of optical materials, the transmission response of the optical system can be modulated to some extent. However, due to physical reasons such as device power and material characteristics, this modulation can usually only be performed in a small range and small amplitude. Summary of the invention

[0004] The present application aims to solve one of the technical problems in the related art to a certain extent. To this end, the present application provides a response waveform modulation method, device, system and readable medium of an optical system.

[0005] As a first aspect of the present application, a response waveform modulation method of an optical system is provided, wherein the optical system comprises a plurality of cascaded optical elements having periodic responses and a plurality of phase modulators respectively arranged on each of the optical elements; the method comprises:

[0006] Acquire a target translation amount of an optical system response waveform and a free spectral range (FSR) length of a response waveform of each of the plurality of optical elements;

[0007] Determining the phase modulation amount of each of the plurality of optical elements according to the target translation amount of the optical system response waveform, each of the FSR lengths and a preset translation algorithm;

[0008] The determined multiple phase modulation amounts are output to corresponding phase modulators respectively, so that the response waveforms of the optical elements are modulated by the multiple phase modulators respectively according to the multiple phase modulation amounts.

[0009] Optionally, in the step of determining the phase modulation amount of each of the plurality of optical elements according to the target translation amount of the optical system response waveform, each of the FSR lengths and a preset translation algorithm, the translation algorithm determines the phase modulation amount of each of the plurality of optical elements by the following formula:

[0010] mod{ΔD,FSR i}=Δλ i (t) (a);

[0011]

[0012] In formula (a) and formula (b), ΔD represents the target shift of the optical system response waveform. FSR i represents the FSR length of the i-th optical element, Δλ i (t) represents the wavelength shift of the i-th optical element, mod{ΔD, FSR i} represents the ΔD versus FSR i Perform a modulo operation, represents the phase modulation amount of the i-th optical element, and t represents time.

[0013] Optionally, after the response waveform of each of the optical elements is modulated by the multiple phase modulators according to the multiple phase modulation amounts, the wavelength offset of the response waveform of each of the optical elements changes periodically over time, and the change period of the wavelength offset of each of the optical elements and the FSR length of the response waveform of each of the optical elements satisfy the following formula:

[0014]

[0015] In formula (c), T1:T2:T3:...:T n represents the variation period of the wavelength shift of the first, second, third, ..., nth optical element, FSR1, FSR2, FSR3, ..., FSR n The FSR lengths of the response waveforms of the first, second, third, ..., nth optical elements are represented in sequence.

[0016] Optionally, obtaining the free spectral range (FSR) length of the response waveforms of each of the plurality of optical elements comprises:

[0017] Acquire FSR length geometric correlation parameters of the response waveforms of the plurality of optical elements;

[0018] The FSR lengths of the response waveforms of the plurality of optical elements are determined according to the FRS length associated parameters.

[0019] Optionally, when the optical element is an asymmetric Mach-Zehnder interferometer MZI or an asymmetric Michelson interferometer MI, the FSR length geometric association parameter is the arm length difference between two arms of the interferometer.

[0020] Optionally, when the optical element is a micro-ring resonant cavity structure, the FSR length geometric correlation parameter is the ring length of the micro-ring resonant cavity structure.

[0021] As a second aspect of an embodiment of the present application, an electronic device is provided, wherein the electronic device includes:

[0022] one or more processors;

[0023] A memory having one or more computer programs stored thereon, when the one or more computer programs are executed by the one or more processors, the one or more processors implement the response waveform modulation method of the optical system provided in the first aspect of the embodiment of the present application.

[0024] As a third aspect of the embodiments of the present application, an optical modulation system is provided, wherein the optical modulation system comprises an optical system and the electronic device provided by the second aspect of the embodiments of the present application, wherein the optical system comprises a plurality of cascaded optical elements having a periodic response and a plurality of phase modulators respectively arranged on each of the optical elements;

[0025] The optical element is used to generate a periodic response wave according to an input optical signal; the phase modulator is used to modulate the periodic response wave of the corresponding optical element so as to shift the response waveform of the optical system in the spectral domain.

[0026] Optionally, the optical element is any one of the following: an asymmetric Mach-Zehnder interferometer, a micro-ring structure, an asymmetric Michelson interferometer, and a Fabry-Perot resonant cavity.

[0027] As a fourth aspect of an embodiment of the present application, a computer-readable medium is provided, on which a computer program is stored, wherein when the computer program is executed by a processor, the response waveform modulation method of the optical system provided in the first aspect of the embodiment of the present application is implemented.

[0028] In the response waveform modulation method of the optical system provided in the embodiment of the present application, the optical system includes a plurality of cascaded optical elements with periodic response and a plurality of phase modulators respectively arranged on each optical element; the total FSR length of the optical system can be greatly increased. Further, by obtaining the target translation amount of the response waveform of the optical system and the FSR length of each of the plurality of optical elements, the phase modulation amount of each of the plurality of optical elements is determined by using a preset translation algorithm, and the determined plurality of phase modulation amounts are respectively output to the corresponding phase modulators, so that the response waveform of each corresponding optical element is modulated by the plurality of phase modulators according to the plurality of phase modulation amounts, so that the response waveform of the optical system can be linearly translated greatly within a very large range, i.e., within the total FSR, while maintaining the shape of the response waveform of the optical system unchanged, even when the modulation range of each optical element is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present application is further described below in conjunction with the accompanying drawings:

[0030] Figure 1 It is a flow chart of an implementation method of a response waveform modulation method of an optical system provided in an embodiment of the present application;

[0031] Figure 2a is a brief schematic diagram of an optical system provided in an embodiment of the present application;

[0032] Figure 2b It is a schematic diagram of response waveform accumulation provided in an embodiment of the present application;

[0033] Figure 2c It is a schematic diagram of response waveform translation provided in an embodiment of the present application;

[0034] Figure 2d is a schematic diagram showing the change of the wavelength shift of the optical element provided in the embodiment of the present application over time;

[0035] Figure 3 is a flow chart of another implementation of the response waveform modulation method of the optical system provided in the embodiment of the present application;

[0036] Figure 4 It is a flow chart of another implementation of the response waveform modulation method of the optical system provided in the embodiment of the present application;

[0037] Figure 5a is a schematic diagram of an optical system provided by an embodiment of the present application, which is a cascade connection of multiple asymmetric Mach-Zehnder interferometers;

[0038] Figure 5b is a schematic diagram of another optical system provided by an embodiment of the present application, which includes a plurality of asymmetric Mach-Zehnder interferometers cascaded;

[0039] Figure 6 It is a schematic diagram of the optical path of the prism system of the asymmetric Michelson interferometer provided in an embodiment of the present application;

[0040] Figure 7 is a schematic diagram of an optical system having multiple micro-ring structures cascaded in an embodiment of the present application;

[0041] Figure 8 It is a schematic diagram of the composition of a verification system provided in an embodiment of the present application;

[0042] Fig. 9 It is a module schematic diagram of an implementation mode of an electronic device provided in an embodiment of the present application;

[0043] Fig.10 It is a schematic diagram of a computer-readable medium provided in an embodiment of the present application.

[0044] Description of Reference Numerals

[0045] 101: Processor 102: Memory

[0046] 103: I / O interface 104: bus DETAILED DESCRIPTION

[0047] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments based on the embodiments are intended to be used to explain the present application and cannot be understood as limiting the present application.

[0048] References to "one embodiment" or "an example" or "an example" in this specification mean that a particular feature, structure, or characteristic described in conjunction with the embodiment itself may be included in at least one embodiment disclosed in the present application. The appearance of the phrase "in one embodiment" in various places in the specification does not necessarily refer to the same embodiment.

[0049] At present, the relevant technology can only modulate the transmission response of the optical system in a small range and a small amplitude. In this regard, the inventor of the present application proposes that by constructing an optical system with a cascade of multiple optical elements with periodic responses, and then performing specific modulation on each optical element at the same time, the overall response waveform of the optical system can be linearly shifted in a large range.

[0050] As a first aspect of the present application, a response waveform modulation method of an optical system is provided, wherein the optical system comprises a plurality of cascaded optical elements having periodic responses and a plurality of phase modulators respectively arranged on each of the optical elements; Figure 1As shown, the method may include:

[0051] In step S110, a target translation amount of an optical system response waveform and a free spectral range (FSR) length of a response waveform of each of the plurality of optical elements are obtained;

[0052] In step S120, the phase modulation amount of each of the plurality of optical elements is determined according to the target translation amount of the optical system response waveform, each of the FSR lengths and a preset translation algorithm;

[0053] In step S130, the determined multiple phase modulation amounts are output to corresponding phase modulators respectively, so that the response waveforms of the optical elements are modulated by the multiple phase modulators respectively according to the multiple phase modulation amounts.

[0054] The method provided in the embodiment of the present application is used to modulate the transmission response waveform of the optical system, such as Figure 2a As shown in FIG. 1 , it is a brief schematic diagram of an optical system provided in an embodiment of the present application. It can be seen that the optical system includes a plurality of cascaded optical elements ( Figure 2a The periodic element 1, periodic element 2, ... periodic element n) shown in the figure and a plurality of phase modulators ( Figure 2a not shown).

[0055] The fact that an optical element has a periodic response means that a response waveform of the optical element has periodicity in the spectral domain (ie, the wavelength domain or the wave number domain), and the period length of the response waveform is the free spectral range (FSR) length.

[0056] In the embodiments of the present application, there is no special limitation on the optical element, as long as it is an optical element with a periodic response. For example, the types of optical elements may include an asymmetric Mach-Zehnder interferometer (MZI), an asymmetric Michelson interferometer (MI), a micro-ring structure, a Fabry–Pérot cavity (FP), and the like.

[0057] In the embodiments of the present application, the response waveform of the optical element and the response waveform of the optical system are different. The response waveform of the optical element, as the name implies, refers to the response waveform of the optical element itself, while the response waveform of the optical system is equivalent to the result of the accumulation of the response waveforms of multiple optical elements. The target translation amount of the response waveform of the optical system refers to the amount by which the overall response waveform of the optical system needs to be translated. The embodiments of the present application do not specifically limit how to obtain the target translation amount of the response waveform of the optical system. For example, it can be determined according to actual engineering needs.

[0058] The total period length of the response waveform of the optical system, that is, the total FSR length of the response waveform of the optical system, is the least common multiple of the FSR lengths of the response waveforms of multiple optical elements. When the FSR lengths of the response waveforms of multiple optical elements are different, the response waveform of the optical system will have a larger total FSR length and a more complex waveform. For example, if four periodic response optical elements are cascaded, and the FSR lengths are 7 nanometers, 5 nanometers, 3 nanometers, and 2 nanometers, respectively, the total FSR length will be LCM (7, 5, 3, 2) = 210 nanometers. It can be seen that it is very easy to construct an optical system by cascading multiple optical elements with periodic responses, so that the total FSR length of the optical system is much greater than the FSR length of any of the optical elements.

[0059] like Figure 2b As shown, it is a schematic diagram of response waveform accumulation provided by an embodiment of the present application. The response waveforms of each optical element and the optical system have a relationship between wavelength (λ) and photocurrent (A). The FSR lengths of the response waveforms of periodic response optical element 1, periodic response optical element 2, periodic response optical element 3, ... periodic response optical element n are respectively represented as FSR1, FSR2, FSR3, ..., FSR n , the total FSR length of the response waveform of the optical system is expressed as FSR noverall Compared with a single optical element, the response waveform of the optical system has a larger total FSR length. Moreover, as the number of optical elements increases and the difference in FSR lengths of the response waveforms between multiple optical elements becomes larger, the total FSR length of the response waveform of the optical system will also be larger.

[0060] Since the optical system is composed of a cascade of multiple optical elements with periodic responses, the response waveform of the optical system has great design freedom, that is, the response waveform of the entire optical system can be designed by designing the response waveform of each optical element.

[0061] Furthermore, due to the inherent periodic characteristics of each optical element, the wavelength changes of multiple optical elements can only occur within their respective FSRs. In this regard, the inventors of the present application propose that by ensuring that the wavelength offset of each optical element remains consistent at any time in terms of timing, the FSR limitation of a single optical element can be broken, and the response waveform of the optical system can be linearly shifted significantly within the total FSR while maintaining the transmission response waveform of the optical system unchanged. Figure 2c As shown, it is a schematic diagram of a response waveform shift provided by an embodiment of the present application, by providing wavelength shifts Δλ1(t), Δλ2(t), Δλ3(t), ..., Δλ4(t) to periodic response optical element 1, periodic response optical element 2, periodic response optical element 3, ..., periodic response optical element n respectively in a time sequence. n (t), the response waveform of the entire optical system can be shifted by Δλ in the wavelength (λ) domain. overall (t).

[0062] By obtaining the FSR lengths of each of the multiple optical elements and the target translation of the response waveform of the optical system, the phase modulation amount of each of the multiple optical elements can be determined using a preset translation algorithm. Then, by using a phase modulator, the response waveform of each corresponding optical element is modulated according to the phase modulation amount. In this way, the same wavelength offset can be provided to each optical element at all times in terms of timing, thereby achieving the translation of the overall response waveform of the optical system.

[0063] In the response waveform modulation method of the optical system provided in the embodiment of the present application, the optical system includes a plurality of cascaded optical elements with periodic response and a plurality of phase modulators respectively arranged on each optical element; the total FSR length of the optical system can be greatly increased. Further, by obtaining the target translation amount of the response waveform of the optical system and the FSR length of each of the plurality of optical elements, the phase modulation amount of each of the plurality of optical elements is determined by using a preset translation algorithm, and the determined plurality of phase modulation amounts are respectively output to the corresponding phase modulators, so that the response waveform of each corresponding optical element is modulated according to the plurality of phase modulation amounts by the plurality of phase modulators, and the response waveform of the optical system can be linearly translated greatly within a very large range, i.e., within the total FSR, while maintaining the shape of the response waveform of the optical system unchanged, even when the modulation range of each optical element is small.

[0064] In some embodiments, in the step of determining the phase modulation amount of each of the plurality of optical elements according to the target translation amount of the optical system response waveform, each of the FSR lengths and the preset translation algorithm, the phase modulation amount of each of the plurality of optical elements is determined by the following formulas (a) and (b):

[0065] mod{ΔD,FSR i}=Δλ i (t) (a);

[0066]

[0067] In formula (a) and formula (b), ΔD represents the target shift of the optical system response waveform, FSR i represents the FSR length of the i-th optical element, Δλ i (t) represents the wavelength shift of the i-th optical element, mod{ΔD, FSR i} represents the ΔD versus FSR i Perform a modulo operation, represents the phase modulation amount of the i-th optical element, and t represents time.

[0068] The preset translation algorithm includes formula (a) and formula (b).

[0069] like Figure 3 As shown, in an embodiment of the present application, firstly, the target shift of the response waveform of the optical system and the FSR length of the response waveform of each of the multiple optical elements are obtained; further, according to each FSR length and formula (a), the wavelength offset of each of the multiple optical elements is calculated; further, according to each wavelength offset and formula (b), the phase modulation amount of each of the multiple optical elements is calculated; further, each phase modulation amount is output to the corresponding phase modulator respectively; finally, the response waveform of the optical system is shifted as a whole: the target shift of the response waveform of the optical system.

[0070] Mathematically, the response waveform of any optical element i with periodic response can be described in the wavelength (λ) domain as:

[0071] T i (λ)=α i +β i (λ) (1);

[0072] In formula (1), α i is a constant term that does not change with wavelength (i.e., DC component), and β i (λ) is the periodic term (i.e., AC component) that changes with wavelength at a specific period. i The period length of (λ) is usually described by the concept of free spectral range FSR, denoted as FSR i .

[0073] The response waveform of the entire optical system with multiple optical elements with periodic response in cascade can be written as the cumulative multiplication of the response waveforms of multiple optical elements:

[0074]

[0075] In formula (2), n is the total number of optical elements, T overall (λ) represents the response waveform of the entire optical system.

[0076] The period length of the response waveform of the entire optical system, that is, the total FSR length, is the least common multiple of the FSR lengths of the response waveforms of multiple optical elements:

[0077] FSR overall =LCM(FSR i , i=1,2,...,n) (3);

[0078] In formula (3), LCM(…) means calculating the least common multiple, FSR overall Represents the total FSR length of the entire optical system response waveform, FSR i represents the FSR length of the response waveform of the i-th optical element.

[0079] In summary, when the FSR lengths of the response waveforms of multiple optical elements are different, the response waveform of the optical system will have a larger total FSR length and the waveform will be more complex.

[0080] like Figure 2d FIG. 1 is a schematic diagram showing the variation of the wavelength offset of the optical element provided in the embodiment of the present application over time, still with FSR1, FSR2, . . . , FSR n , respectively, represent the FSR lengths of the response waveforms of the periodic response optical element 1, the periodic response optical element 2, ..., and the periodic response optical element n, with T all Represents the total modulation time. After the response waveform of each optical element is modulated according to the phase modulation amount, since each optical element responds periodically and the rate of wavelength shift at each level is the same, the wavelength offset of the response waveform of each optical element will show a periodic change. This period can be called the wavelength offset change period. In each wavelength offset change period, the wavelength of the response waveform of the optical element continues to shift until the wavelength offset reaches the FSR length at the end of the wavelength offset change period. It can be seen that the wavelength offset of the response waveform of each optical element is actually repeated continuously within its FSR length. Due to the periodic characteristics of the optical element, this repetition causes the response waveform of the entire optical system to shift linearly within the total FSR.

[0081] Correspondingly, in some embodiments, after the response waveform of each of the optical elements is modulated by the phase modulator according to the phase modulation amount, the wavelength offset of the response waveform of each of the optical elements changes periodically with time.

[0082] Since the wavelength offset of each optical element remains the same at all times, the time required for each optical element to complete the translation of its own FSR length response waveform, that is, the change period of the wavelength offset, can be recorded as T i , T of each optical element i The FSR period length of the response waveform of each optical element i There is an inverse relationship between them.

[0083] Accordingly, in some embodiments, the variation period of the wavelength offset of each optical element and the FSR length of the response waveform of each optical element satisfy formula (c):

[0084]

[0085] In formula (c), T1, T2, T3, ..., T n represents the variation period of the wavelength shift of the first, second, third, ..., nth optical element, FSR1, FSR2, FSR3, ..., FSR n The FSR lengths of the response waveforms of the first, second, third, ..., nth optical elements are represented in sequence.

[0086] The total modulation time T all Will satisfy:

[0087]

[0088] The wavelength shift of the timing is Δλ i Substituting (t) into the above formula (2), we get:

[0089]

[0090] If the initial time is recorded as t0, and the wavelength offset at the initial time is regarded as 0, the above formula (5) can be further rewritten in incremental form as follows:

[0091]

[0092] In formula (6), Δt and Δλ represent the time increment and wavelength increment respectively, T all Represents the total modulation time, T overall (…) represents the response waveform of the entire optical system, C is a constant that depends on the offset modulation speed (the offset modulation speed corresponds to the above formula (c)); the ranges of Δt and Δλ are 0≤Δt≤T all , and 0≤Δλ≤FSR overall That is, when the modulation time is from 0 to T allWhen the response waveform of the entire optical system can complete one FSR overall of translation.

[0093] Generally, the FSR length of an optical element is determined by geometric parameters and group refractive index. However, in a chip including multiple optical elements with periodic response, the group refractive indexes of these different optical elements with periodic response are the same. Therefore, it is possible to consider determining the FSR length of each response waveform of the multiple optical elements only based on the geometric parameters. Accordingly, in some embodiments, the free spectral range FSR length of each response waveform of the multiple optical elements (i.e., involved in step S110) is obtained, such as Figure 4 As shown, it may include:

[0094] In step S210, the FSR length geometric correlation parameters of the response waveforms of the plurality of optical elements are obtained;

[0095] In step S220, the FSR lengths of the response waveforms of the plurality of optical elements are determined according to the FRS length associated parameters.

[0096] As described above, in the embodiments of the present application, there is no particular limitation on the optical element with periodic response, as long as it is an optical element with periodic response, for example, the type of optical element may include an asymmetric Mach-Zehnder interferometer, an asymmetric Michelson interferometer, a micro-ring structure, a Fabry-Perot cavity, etc. These periodic optical elements have been widely used in the relevant technology, but how to use these periodic optical elements to construct an optical system whose response waveform can be linearly translated in a large range is very critical.

[0097] In the embodiment of the present application, the multiple optical elements in the optical system can be any one or any combination of an asymmetric Mach-Zehnder interferometer, an asymmetric Michelson interferometer, a micro-ring structure, and a Fabry-Perot cavity. In other words, the embodiment of the present application is not limited to using a single type of optical element with a periodic response to construct an optical system, and multiple types of optical elements with a periodic response can also be used simultaneously to construct an optical system.

[0098] It should be noted that different types of optical elements with periodic response may have different FSR length geometry correlation parameters.

[0099] In some embodiments, when the optical element is an asymmetric Mach-Zehnder interferometer MZI or an asymmetric Michelson interferometer MI, the FSR length geometric correlation parameter is the arm length difference between the two arms of the interferometer.

[0100] When the optical element is an asymmetric Mach-Zehnder interferometer MZI, the FSR length of the MZI can be determined by the arm length difference between the two arms of the MZI. In addition, two adjacent asymmetric Mach-Zehnder interferometers can be connected through their own beam splitting elements or by sharing a beam splitting element, such as Figure 5a FIG. 1 is a schematic diagram of an optical system provided by an embodiment of the present application, which is a cascade of multiple asymmetric Mach-Zehnder interferometers. Each Mach-Zehnder interferometer is provided with two phase modulators, and each two adjacent Mach-Zehnder interferometers are connected through their respective beam splitters. Figure 5b As shown, it is a schematic diagram of another optical system provided by an embodiment of the present application, which is a cascade of multiple asymmetric Mach-Zehnder interferometers. Two phase modulators are provided on each Mach-Zehnder interferometer, and every two adjacent Mach-Zehnder interferometers are connected by sharing a splitter element.

[0101] When the optical element is an asymmetric Michelson interferometer MI, the FSR length of the MI can be determined by the arm length difference between the two arms of the MI, such as Figure 6 The figure shows a schematic diagram of a prism system of an asymmetric Michelson interferometer provided in an embodiment of the present application. MI uses a prism system to achieve a transmission response to an input optical signal. The Michelson interferometer is composed of three optical elements: a beam splitter (50:50 half-mirror), a movable plane reflector (total reflector (adjustable optical path)) and a fixed plane reflector (total reflector). The function of the 50:50 half-mirror is to split a beam of light into two beams of light of equal intensity, a reflected light and a transmitted light; the function of the total reflector is to reflect the reflected light; the function of the total reflector (adjustable optical path) is to reflect the transmitted light and adjust the FSR of MI by adjusting its position.

[0102] In some embodiments, when the optical element is a micro-ring resonant cavity structure, the FSR length geometric correlation parameter is the ring length of the micro-ring resonant cavity structure.

[0103] When the optical element is a micro-ring resonant cavity structure, the FSR length of the micro-ring resonant cavity structure can be determined by the ring length of the micro-ring resonant cavity structure, such as Figure 7 FIG. 1 is a schematic diagram of an optical system provided by an embodiment of the present application that has a plurality of micro-ring resonant cavity structures connected in cascade. Each micro-ring structure is provided with a phase modulator and a light splitting element is connected to the bottom.

[0104] In the embodiments of the present application, these optical elements can be integrated on different optical platforms, such as silicon-based optical platforms (pure silicon or silicon germanium platforms), silicon nitride (SiN) optical platforms, indium phosphide (InP) or indium arsenide (InAs) and other III-V optical platforms, lithium phosphate (LN) optical platforms, etc. Of course, the optical platform can also be composed of optical fiber arms of different lengths, fiber splitters, and optical fiber reflectors in the optical fiber system.

[0105] In the embodiments of the present application, the phase modulator provided on an optical element with a periodic response, such as an asymmetric Mach-Zehnder interferometer, a micro-ring resonant cavity structure or an asymmetric Michelson interferometer MI, can be realized based on any of the following effects: thermo-optical effect, electro-optical effect or nonlinear effect of an integrated waveguide or optical fiber. Moreover, there is no specific limitation on the specific setting method of the phase modulator on the asymmetric Mach-Zehnder interferometer. For example, the phase modulator can be provided on both arms of the asymmetric Mach-Zehnder interferometer at the same time, or it can be provided on only one of the two arms of the asymmetric Mach-Zehnder interferometer. Moreover, there is no specific limitation on the spectroscopic element connected between two adjacent optical elements with a periodic response. For example, the spectroscopic element can be various common waveguide or optical fiber spectrometers such as a directional coupler, a multi-mode interferometer (MMI), and the like.

[0106] In the embodiments of the present application, the types of the microring resonant cavity structure may include various common microrings and their variants, such as a single-port straight-through microring, a dual-port add-drop microring, a Vernier microring, a microdisk microring, a racetrack microring, a curved waveguide microring, and the like.

[0107] In addition, the inventor of the present application also provides a verification system for verifying the proposed optical system and its response waveform modulation method. Figure 8As shown, a schematic diagram of the composition of a verification system provided by an embodiment of the present application is provided. An integrated chip with a six-stage asymmetric Mach-Zehnder interferometer is prepared on a silicon nitride integrated platform. An amplified spontaneous emission (ASE) light source is used as the incident light source of the chip. A computer and a driver are used to control the drive circuit to control the wavelength offset of each interferometer to achieve the overall translation of the response waveform. An optical spectrum analyzer is used to measure the final response waveform of the multi-stage Mach-Zehnder interferometer chip based on the integrated optical circuit. The actual measurement results show that the response waveform does shift, and within a wavelength range of more than 100 nanometers, the response waveform of the entire optical system achieves a uniform linear translation, while the shape of the response waveform remains unchanged.

[0108] As a second aspect of the embodiments of the present application, an electronic device is provided, wherein: Fig. 9 As shown, the electronic device includes:

[0109] One or more processors 101;

[0110] The memory 102 stores one or more computer programs. When the one or more computer programs are executed by the one or more processors 101, the one or more processors 101 implement the response waveform modulation method of the optical system provided in the first aspect of the embodiment of the present application.

[0111] The electronic device may further include one or more I / O interfaces 103 connected between the processor 101 and the memory 102 and configured to implement information interaction between the processor 101 and the memory 102 .

[0112] Among them, the processor 101 is a device with data processing capabilities, including but not limited to a central processing unit (CPU), etc.; the memory 102 is a device with data storage capabilities, including but not limited to random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory (FLASH); the I / O interface (read-write interface) is connected between the processor and the memory, and can realize information exchange between the processor and the memory, including but not limited to a data bus (Bus), etc.

[0113] In some embodiments, the processor 101 , the memory 102 , and the I / O interface 103 are connected to each other via a bus 104 , and further connected to other components of the computing device.

[0114] As a third aspect of an embodiment of the present application, an optical modulation system is provided, which includes an optical system and an electronic device provided according to the second aspect of the embodiment of the present application, the optical system includes a cascaded plurality of optical elements with periodic response and a plurality of phase modulators respectively arranged on each of the optical elements; the optical element is used to generate a periodic response wave according to an input light signal; the phase modulator is used to modulate the periodic response wave of the corresponding optical element so that the overall response waveform of the optical system is shifted in the spectral domain.

[0115] like Figure 2a As shown, the optical system includes a plurality of cascaded optical elements with periodic response ( Figure 2a The periodic element 1, the periodic element 2, ..., the periodic element n) shown in the figure, and a plurality of phase modulators ( Figure 2a not shown).

[0116] In some embodiments, the optical element is any one of the following: an asymmetric Mach-Zehnder interferometer, a micro-ring structure, an asymmetric Michelson interferometer, and a Fabry-Perot cavity.

[0117] In the embodiment of the present application, the multiple optical elements in the optical system can be any one or any combination of an asymmetric Mach-Zehnder interferometer, an asymmetric Michelson interferometer, a micro-ring structure, and a Fabry-Perot cavity. In other words, the embodiment of the present application is not limited to using a single type of optical element with a periodic response to construct an optical system, and multiple types of optical elements with a periodic response can also be used simultaneously to construct an optical system.

[0118] As a fourth aspect of the embodiment of the present application, Fig.10 As shown, a computer-readable medium is provided, on which a computer program is stored, wherein when the computer program is executed by a processor, the response waveform modulation method of the optical system provided in the first aspect of the embodiment of the present application is implemented.

[0119] It can be understood by a person of ordinary skill in the art that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program. Accordingly, the computer program can be stored in a non-volatile computer-readable storage medium, and the computer program can implement the method of any of the above-mentioned embodiments when executed. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the embodiments of the present application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0120] The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present application will be included in the scope of the claims.

Claims

1. A response waveform modulation method for an optical system, characterized in that: The optical system comprises a plurality of cascaded optical elements with periodic response and a plurality of phase modulators respectively arranged on each of the optical elements; the method comprises: Acquire a target translation amount of an optical system response waveform and a free spectral range (FSR) length of a response waveform of each of the plurality of optical elements; Determining the phase modulation amount of each of the plurality of optical elements according to the target translation amount of the optical system response waveform, each of the FSR lengths and a preset translation algorithm; Outputting the determined multiple phase modulation amounts to corresponding phase modulators respectively, so as to modulate the response waveform of each of the optical elements according to the multiple phase modulation amounts through the multiple phase modulators respectively; Wherein, in the step of determining the phase modulation amount of each of the plurality of optical elements according to the target translation amount of the optical system response waveform, each of the FSR lengths and the preset translation algorithm, the phase modulation amount of each of the plurality of optical elements is determined by the following formula: mod{ΔD,FSR i }=Dl i (t) (a); In formula (a) and formula (b), ΔD represents the target shift of the optical system response waveform, FSR i represents the FSR length of the i-th optical element, Δλ i (t) represents the wavelength shift of the i-th optical element, mod{ΔD,FSR i } represents the ΔD versus FSR i Perform a modulo operation, represents the phase modulation amount of the i-th optical element, and t represents time.

2. The method according to claim 1, characterized in that After the response waveforms of the optical elements are modulated by the multiple phase modulators according to the multiple phase modulation amounts, the wavelength shift of the response waveform of the optical element changes periodically with time, and the change period of the wavelength shift of the optical element and the FSR length of the response waveform of the optical element satisfy the following formula: In formula (c), T1, T2, T3, ..., T n represents the variation period of the wavelength shift of the first, second, third, ..., nth optical element, FSR1, FSR2, FSR3, ..., FSR n The FSR lengths of the response waveforms of the first, second, third, ..., nth optical elements are represented in sequence.

3. The method according to claim 1, characterized in that Obtaining the free spectral range (FSR) length of the response waveforms of each of the plurality of optical elements comprises: Acquire FSR length geometric correlation parameters of the response waveforms of the plurality of optical elements; The FSR lengths of the response waveforms of the plurality of optical elements are determined according to the FRS length associated parameters.

4. The method according to any one of claims 1 to 3, characterized in that When the optical element is an asymmetric Mach-Zehnder interferometer MZI or an asymmetric Michelson interferometer MI, the FSR length geometric correlation parameter is the arm length difference between the two arms of the interferometer.

5. The method according to any one of claims 1 to 3, characterized in that: When the optical element is a micro-ring resonant cavity structure, the FSR length geometric correlation parameter is the ring length of the micro-ring resonant cavity structure.

6. An electronic device, characterized in that: The electronic device comprises: one or more processors; A memory having one or more computer programs stored thereon, wherein when the one or more computer programs are executed by the one or more processors, the one or more processors implement the response waveform modulation method of the optical system according to any one of claims 1-5.

7. An optical modulation system, characterized in that: The optical modulation system comprises an optical system and the electronic device according to claim 6, wherein the optical system comprises a plurality of cascaded optical elements having periodic responses and a plurality of phase modulators respectively arranged on each of the optical elements; The optical element is used to generate a periodic response wave according to an input optical signal; The phase modulator is used to modulate the periodic response wave of the corresponding optical element so as to shift the response waveform of the optical system in the spectral domain.

8. The optical modulation system according to claim 7, characterized in that: The optical element is any one of the following: an asymmetric Mach-Zehnder interferometer, a micro-ring resonant cavity structure, an asymmetric Michelson interferometer, and a Fabry-Perot resonant cavity.

9. A computer readable medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the response waveform modulation method of the optical system according to any one of claims 1 to 5 is implemented.

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