Photoelectric integrated stable-phase light emitting device and method

Abstract

The invention discloses a photoelectric integrated stable-phase light emitting device and method, and the device comprises a power divider chip which is used for receiving a stable-phase radio frequency signal, and decomposing the signal into a first reference electric signal and a second signal to be subjected to phase shift, which are homologous; the stable-phase transmission channel is used for transmitting the second to-be-phase-shifted signal; the reference receiving channel is used for receiving a feedback electric signal which is obtained after a reference optical signal fed back by a far end is subjected to photoelectric conversion; the phase shifter chip is used for performing equivalent phase shifting on the signals in the two channels; the mixer chip is used for generating phase discrimination voltage at an output end; the controller chip is used for generating the phase shift control voltage based on the phase discrimination voltage and feeding back the phase shift control voltage to the phase shifter chip; and the electro-optical modulation core group is used for converting the second signal to be subjected to phase shift processing into an output optical signal with stable phase. The photoelectric hybrid integration and bidirectional phase shift technology is adopted, the isolation degree and the phase stability are remarkably improved, and the loss and the device size are reduced.

Description

Technical Field

[0001] This invention relates to the field of optical transmission technology, and in particular to an optoelectronic integrated stable phase light emitting device and method. Background Technology

[0002] Fiber optic phase-stabilized transmission is well-suited for transmitting radio frequency (RF) signals due to its advantages such as low transmission loss, resistance to electromagnetic interference, low cost, and abundant bandwidth, and has a wide range of applications. However, fiber optics are highly sensitive to environmental conditions, often requiring real-time phase compensation at the transmitting end through phase adjustment devices and phase-stabilized closed-loop control circuits to ensure the phase stability of the RF signal received at the remote end. In existing fiber optic phase-stabilized transmission solutions, phase adjustment devices and phase-stabilized closed-loop control circuits are often implemented using discrete components, which makes it difficult to meet the requirements of system integration, lightweight design, and low power consumption in fiber optic phase-stabilized transmission systems. Furthermore, the phase adjustment devices at the transmitting end of fiber optic phase-stabilized transmission solutions often employ cascaded switch delay lines, spatial light continuously adjustable optical delay lines, and voltage-controlled fiber optic loops to achieve optical delay adjustment and thus phase compensation. However, the large size of spatial light continuously adjustable optical delay lines and voltage-controlled fiber optic loops makes integration with microwave and optical chips difficult. While cascaded switch delay lines can be implemented using optical chips, those used for fiber-optic phase-stable transmission need to simultaneously meet the large delay requirements of low-frequency signals and the fine delay steps required for high-frequency signals. This results in a large number of switch delay lines and significant overall loss. Using cascaded switch delay lines for optoelectronic integration in fiber-optic phase-stable transmission transmitters leads to excessive optical transmission loss, affecting the signal-to-noise ratio. Therefore, this paper proposes an optoelectronically integrated phase-stable optical transmission transmitter to improve its integration and performance while reducing its overall size and weight, which has significant practical application value. Summary of the Invention

[0003] To address the technical problems existing in the background art, the present invention proposes an optoelectronic integrated stable phase light emitting device and method.

[0004] In a first aspect, the present invention proposes an optoelectronic integrated phase-stabilized optical transmitter, comprising: a power divider chip for receiving a phase-stabilized radio frequency signal and decomposing the signal into a first reference electrical signal and a second phase-shifting signal of the same origin; A stable phase transmission channel, with its input end connected to the second output end of the power divider chip, is used to transmit the second phase-shifting signal; The reference receiving channel has its input end connected to a photodetector chip, which is used to receive the feedback electrical signal after photoelectric conversion of the reference optical signal fed back from the remote end. The phase shifter chip is bidirectionally connected to the stable phase transmission channel and the reference receiving channel, and is used to perform equal phase shift on the signals in the two channels. The phase shift value is adjusted in real time by an external control voltage. The mixer chip has a first input terminal connected to the first output terminal of the power divider chip to receive a first reference electrical signal, a second input terminal used to receive a phase-shifted feedback electrical signal, and an output terminal generating a phase detection voltage. The controller chip has its input terminal connected to the output terminal of the mixer chip. It generates the phase-shifting control voltage based on the phase-detection voltage and feeds it back to the phase-shifter chip. The electro-optic modulation core assembly, with its input end connected to the output end of the phase-stable transmission channel, is used to convert the second phase-shifted signal after phase-shifting into a phase-stable output optical signal.

[0005] Furthermore, the stable phase transmission channel includes a first transmission channel and a second transmission channel; The first transmission channel is integrated from a first isolator chip and a first circulator chip; the second transmission channel is integrated from a second circulator chip and a second isolator chip; the first transmission channel and the second transmission channel are connected through a phase shifter chip.

[0006] Furthermore, the connection relationship between the first transmission channel and the second transmission channel includes: The first isolator chip has its input terminal connected to the second output terminal of the power divider chip to receive the second phase-shifting signal. The first circulator chip has its first port connected to the output of the first isolator chip, and the signal is transmitted from the first port to the second port for output. The input terminal of the phase shifter chip is connected to the output of the second port of the first circulator chip. The second circulator chip has its second port connected to the output of the phase shifter chip, and the signal is transmitted from the second port to the third port for output. The second isolator chip has its input end connected to the third port output of the second circulator chip, and its output end connected to the electro-optic modulation chip assembly.

[0007] Furthermore, the reference receiving channel includes a first reference channel and a second reference channel; The first reference channel is integrated from the third isolator chip and the second circulator chip; the second reference channel is integrated from the first circulator chip and the fourth isolator chip; the first reference channel and the second reference channel are connected through a phase shifter chip.

[0008] Furthermore, the connection relationship between the first reference channel and the second reference channel includes: The third isolator chip has its input terminal connected to the output terminal of the photodetector chip. The second circulator chip has its first port connected to the output of the third isolator chip, and the signal is transmitted from the first port to the second port for output. The input terminal of the phase shifter chip is connected to the second port output of the second circulator chip; The first circulator chip has its second port connected to the output of the phase shifter chip, and the signal is transmitted from the second port to the third port for output. The fourth isolator chip has its input terminal connected to the third port output of the first circulator chip, and its output terminal connected to the second input terminal of the mixer chip.

[0009] Furthermore, the photodetector chip is used to convert the received reference optical signal into a feedback electrical signal.

[0010] Furthermore, the electro-optic modulation chip is a single direct-modulation laser chip or a combination of a laser chip and an electro-optic modulator chip; The combination of laser chip and electro-optic modulator chip includes: a laser chip used to output a laser source; The electro-optic modulator chip is used to receive the second phase-shifted signal and the laser source after phase shifting, and output a phase-stable output optical signal.

[0011] On the other hand, a photoelectric integrated stable phase light emission method is characterized by comprising: S1. Receive the stable phase RF signal through the power divider chip, and decompose the stable phase RF signal into a first reference electrical signal and a second phase-shifting signal of the same origin. S2. The second phase-shifting signal is transmitted to the electro-optic modulator chip through the first isolator chip, the first circulator chip, the phase shifter chip, the second circulator chip, and the second isolator chip. After conversion by the electro-optic modulator chip, a stable phase optical signal is output. S3. The photodetector chip receives the reference optical signal and converts it into a feedback electrical signal. The feedback electrical signal is then transmitted to the fourth isolator chip via the third isolator chip, the second circulator chip, the phase shifter chip, and the first circulator chip, and finally to the mixer chip. S4. The mixer chip mixes the first reference electrical signal and the phase-shifted feedback electrical signal to generate and output a phase detection voltage. S5. The controller chip generates a control voltage based on the phase detection voltage and dynamically adjusts the phase shift value of the phase shifter chip.

[0012] The proposed optoelectronic integrated phase-stable light emitting device and method in this invention achieves optical transmission phase compensation through a phase shifter chip. The phase shifter chip, combined with a circulator chip and an isolator chip, not only achieves bidirectional phase shifting of the phase-stable transmission channel and the reference receiving channel, but also improves the isolation between the two channels. The entire device is composed of optical chips and electrical chips, which can realize optoelectronic integration, greatly reduce the interconnection spacing between various devices, reduce the influence of interconnection parasitic parameters, have low loss, good high-frequency performance, and are suitable for high-frequency, high-integration phase-stable transmission scenarios. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of an optoelectronic integrated stable phase light emitting device proposed in this invention; Figure 2 This is a schematic diagram of an embodiment of fiber optic phase-stabilized transmission of an optoelectronic integrated phase-stabilized optical transmitter proposed in this invention; Figure 3 This is a schematic diagram of the optoelectronic integrated stable phase light emission method proposed in this invention. Detailed Implementation

[0014] Reference Figures 1-2 The present invention proposes an optoelectronic integrated stable phase light emitting device, comprising: The power divider chip is used to receive a stable phase RF signal and decompose the signal into a first reference electrical signal and a second phase-shifting signal of the same origin.

[0015] The power divider chip divides the input stable RF signal into two paths. One path is divided into a first reference electrical signal and input to the mixer chip, while the other path is input to the first isolator chip.

[0016] The stable phase transmission channel has its input end connected to the second output end of the power divider chip and is used to transmit the second phase-shifted signal.

[0017] In this embodiment, the stable phase transmission channel includes a first transmission channel and a second transmission channel; wherein, the first transmission channel is integrated by a first isolator chip and a first circulator chip; the second transmission channel is integrated by a second circulator chip and a second isolator chip; the first transmission channel and the second transmission channel are connected through a phase shifter chip.

[0018] Specifically, the connection relationship between the first transmission channel and the second transmission channel includes: a first isolator chip, with its input end connected to the second output end of the power divider chip to receive the second phase-shifted signal; a first circulator chip, with its first port connected to the output end of the first isolator chip, and the signal being transmitted from the first port to the second port for output; a phase shifter chip, with its input end connected to the second port output of the first circulator chip; a second circulator chip, with its second port connected to the output end of the phase shifter chip, and the signal being transmitted from the second port to the third port for output; and a second isolator chip, with its input end connected to the third port output of the second circulator chip, and its output end connected to the electro-optic modulation chip assembly.

[0019] The reference receiving channel has its input end connected to a photodetector chip, used to receive the feedback electrical signal after photoelectric conversion of the reference optical signal fed back from the remote end.

[0020] In this embodiment, the reference receiving channel includes a first reference channel and a second reference channel; wherein, the first reference channel is integrated by a third isolator chip and a second circulator chip; the second reference channel is integrated by a first circulator chip and a fourth isolator chip; the first reference channel and the second reference channel are connected through a phase shifter chip.

[0021] Specifically, the connection relationship between the first reference channel and the second reference channel includes: a third isolator chip, with its input terminal connected to the output terminal of the photodetector chip; a second circulator chip, with its first port connected to the output terminal of the third isolator chip, and the signal transmitted from the first port to the second port for output; a phase shifter chip, with its input terminal connected to the second port output of the second circulator chip; a first circulator chip, with its second port connected to the output terminal of the phase shifter chip, and the signal transmitted from the second port to the third port for output; and a fourth isolator chip, with its input terminal connected to the third port output of the first circulator chip, and its output terminal connected to the second input terminal of the mixer chip. The mixer chip mixes the first reference electrical signal input from the power divider chip with the phase-shifted reference electrical signal input from the fourth isolator chip, and outputs a phase detection voltage to the controller chip. The controller chip acquires and processes the phase detection voltage signal, and outputs a control voltage to the phase shifter chip to adjust the phase shift value of the phase shifter chip in real time.

[0022] Specifically, due to the inherent limited isolation between ports of the circulator chip, it is difficult to independently suppress the strong interference crosstalk between the stable phase transmission channel and the reference receiving channel in high-frequency scenarios. Therefore, by cascading the first isolator chip to the input port (first port) of the first circulator chip, and cascading the fourth isolator chip to its output port (third port), and simultaneously cascading the second isolator chip to the output port (third port) of the second circulator chip, and cascading the third isolator chip to its input port (first port), a bidirectional isolation barrier is formed by utilizing the unidirectional transmission characteristics of the isolator chip with its high reverse isolation and the directional transmission path of the circulator chip, thereby greatly improving the overall isolation between the two channels. This cascaded design simultaneously achieves three advantages: first, it blocks high-power signals from the stable phase transmission channel from entering the reference receiving channel, reducing interference from the stable phase channel to the reference receiving channel; second, it suppresses the reflection noise interference of the reference receiving channel on the phase purity of the stable phase signal; and third, it allows the phase shifter chip to not generate inter-channel coupling phase shifts during bidirectional multiplexing, ultimately achieving a high signal-to-noise ratio for high-frequency stable phase transmission with minimal hardware cost.

[0023] Specifically, taking the third isolator chip as an example, the isolator chip in the device is introduced. The input port of the third isolator chip is connected to the radio frequency output terminal of the photodetector chip, realizing the unidirectional transmission of the signal from the first port to the second port, and suppressing the crosstalk of the high-power signal of the stable phase transmission channel containing the electro-optic modulator to the reference receiving channel.

[0024] The phase shifter chip is bidirectionally connected to both the stable phase transmission channel and the reference receiving channel. It is used to perform equivalent phase shifting on the signals in the two channels, and the phase shift value is adjusted in real time by an external control voltage.

[0025] Among them, the phase shifter chip is a phase shifter chip with bidirectional phase shift function. The bidirectional phase shift values ​​are the same, and the phase shifter chip can adjust the phase shift value according to the control voltage level.

[0026] The mixer chip has a first input terminal connected to the first output terminal of the power divider chip to receive a first reference electrical signal, a second input terminal used to receive a phase-shifted feedback electrical signal, and an output terminal generating a phase detection voltage.

[0027] In this embodiment, the mixer chip performs phase detection on two input radio frequency signals with the same frequency but a phase difference, and outputs a phase detection voltage proportional to the phase difference.

[0028] The controller chip has its input connected to the output of the mixer chip. It generates a phase-shifting control voltage based on the phase detector voltage and feeds it back to the phase shifter chip.

[0029] In this embodiment, the controller chip is used to convert the phase detection voltage into a control voltage and adjust the phase shift value of the phase shifter chip in real time. Specifically, the controller chip acquires the phase detection voltage output from the mixer chip and generates a digital signal. Based on this digital signal, it calculates the required control voltage value for the phase shifter chip and outputs the control voltage to adjust the phase shift value of the phase shifter chip in real time.

[0030] The electro-optic modulation chip, with its input connected to the output of the phase-stable transmission channel, is used to convert the phase-shifted second signal into a phase-stable output optical signal. The electro-optic modulation chip can be a single directly modulated laser chip or a combination of a laser chip and an electro-optic modulator chip.

[0031] In this embodiment, the electro-optic modulation chip includes a laser chip for outputting a laser source.

[0032] Specifically, the laser chip, as the core of the light source for generating stable optical signals, outputs a continuous laser with a wavelength of 1550nm±0.1nm through a distributed feedback structure, providing a pure and phase-consistent optical carrier for the electro-optic modulator chip, so that the second phase-shifted signal to be shifted is loaded into the optical domain.

[0033] The electro-optic modulator chip is used to receive the second phase-shifted signal and the laser source after phase shifting, and output a phase-stable output optical signal.

[0034] In this embodiment, the photodetector chip includes: a photodetector chip for converting the received reference optical signal into a feedback electrical signal.

[0035] The core role of the photodetector chip in the device is to accurately convert the optical reference signal carrying double the perturbation phase information, i.e., phase 2ϕ, into an electrical domain signal, providing a data source for quantizing the perturbation ϕ for closed-loop feedback.

[0036] Specifically, the power divider chip, mixer chip, first isolator chip, first circulator chip, phase shifter chip, second circulator chip, second isolator chip, third isolator chip, fourth isolator chip and controller chip in this device are all electrical chips, while the laser chip, electro-optic modulator chip and photodetector chip are all optical chips. The chips are mounted on the same substrate or housing by bonding, flip-chip, adhesive bonding, coupling and other methods to achieve optoelectronic hybrid integrated interconnection and packaging.

[0037] In this embodiment, to illustrate the working principle of the optoelectronic integrated phase-stabilized optical transmitting device of the present invention in more detail, the following describes the principle of the device in conjunction with the remote phase-stabilized optical receiving unit, forming a complete optical fiber phase-stabilized transmission embodiment. A schematic diagram of an optical fiber phase-stabilized transmission embodiment based on the device of the present invention is shown below. Figure 2 As shown. Assume the input stable RF signal is... ,in Angular frequency, As the initial phase, the stable RF signal is split into two paths by the power divider chip. One path enters the mixer chip, and the other path passes sequentially through the first isolator chip and the first circulator chip before entering the phase shifter chip. Assume the phase shift value of the phase shifter chip is... The second phase-shifted signal output by the phase shifter chip is... The phase shifter chip outputs a second phase-to-shift signal, which sequentially passes through a second circulator chip, a second isolator chip, and an electro-optic modulator chip to complete electro-optic conversion, outputting a stable phase optical signal. This stable phase optical signal is output to the first port of the first optical circulator, and then output to the optical fiber via the second port of the first optical circulator for long-distance transmission. The optical fiber outputs the signal to the remote optically stable receiving unit. The phase disturbance caused during optical fiber transmission is set as... The remote optical phase-stabilized receiving unit includes a second optical circulator, an optical beamsplitter, and a receiving photodetector. The second port of the second optical circulator receives the phase-stabilized optical signal transmitted via optical fiber and sends it to the optical beamsplitter. The optical beamsplitter splits the received optical signal into two paths, one of which is output to the receiving photodetector for photoelectric conversion, outputting a phase-stabilized radio frequency (RF) signal. This phase-stabilized RF signal is... The other path serves as a reference light output to the first port of the second optical circulator, then outputs through the second optical circulator's second port, and finally through the first optical circulator's third port to the photodetector chip, achieving photoelectric conversion. Because this process involves transmission through optical fiber again, the output radio frequency signal is... The reference electrical signal output from the photodetector chip passes sequentially through the third isolator chip and the second circulator chip before being output to the phase shifter chip. The phase shift value of the phase shifter chip is... The phase shifter chip outputs a phase-shifted reference electrical signal as follows: The phase-shifted reference signal output from the phase shifter chip passes sequentially through the first circulator chip and the fourth isolator chip before being output to the mixer chip. The mixer chip then outputs the first reference signal from the power divider chip. and the phase-shifted reference electrical signal output by the fourth isolator chip The mixing process is performed, and the output phase detection voltage and phase difference are... The controller chip acquires the phase detector voltage output from the mixer chip at a fixed ratio and generates a digital signal. Based on this digital signal, it calculates the required control voltage value for the phase shifter chip and outputs the control voltage to adjust the phase shift value of the phase shifter chip in real time. This achieves phase-stable transmission of the RF signal through fiber optic cable, meaning the RF signal output from the photodetector is received in the remote phase-stable receiving unit. The phase of the stable radio frequency signal input to the device of this invention is the same. Throughout the entire stable phase transmission process, the same control voltage value controls the same phase shifter, enabling simultaneous phase shifting of the stable phase signal and the reference electrical signal, thus achieving twice the fiber phase disturbance during the stable phase transmission process. Compensation is performed. It should be noted that in the above process, the transmission paths of the power divider chip, mixer chip, first isolator chip, first circulator chip, second circulator chip, second isolator chip, electro-optic modulator chip, photodetector chip, third isolator chip, fourth isolator chip, first optical circulator, second optical circulator, and optical beam splitter are much shorter than the length of the optical fiber. Relative to the phase disturbance caused by the optical fiber, the phase of the above devices remains unchanged during the phase stabilization process. Therefore, the phase changes of the above devices are not listed in the above principle description.

[0038] Reference Figure 3 This invention proposes an optoelectronic integrated stable phase light emission method, comprising: S1. Receive the stable phase RF signal through the power divider chip, and decompose the stable phase RF signal into a first reference electrical signal and a second phase-shifting signal of the same origin.

[0039] In this design, the first reference electrical signal generated by the distribution is directly fed into the input terminal of the mixer chip, while the second phase-shifted signal enters the first circulator chip via the first isolator chip. This design avoids phase jitter introduced by discrete components through monolithic integration, and at the same time utilizes the high isolation of the power divider chip to suppress reverse crosstalk, establishing a reference signal source for subsequent bidirectional phase-shift compensation.

[0040] S2. The second phase-shifting signal is transmitted to the electro-optic modulator chip through the first isolator chip, the first circulator chip, the phase shifter chip, the second circulator chip, and the second isolator chip. After conversion by the electro-optic modulator chip, a stable phase optical signal is output.

[0041] In this process, the second phase-shifted signal to be phase-shifted is first output from port 3 of the second circulator chip. After the second isolator chip suppresses back reflection, it is input to the electro-optic modulator chip, commonly using lithium niobate (LiNbO3) or indium phosphide (InP)-based electro-optic modulator chips. Simultaneously, the distributed feedback laser chip outputs a continuous laser with a wavelength of 1550 nm ± 0.1 nm to the optical input port of the electro-optic modulator chip. The modulator chip loads the phase-shifted signal onto its microwave transmission line electrodes, and through the electro-optic effect, loads the second phase-shifted signal onto the optical carrier, generating an intensity-modulated stable phase optical signal. The generated stable phase optical signal is output to a single-mode fiber through end-face coupling or waveguide grating coupling, ultimately achieving phase-compensated stable phase optical transmission.

[0042] S3. The photodetector chip receives the reference optical signal and converts it into a feedback electrical signal. The feedback electrical signal is then transmitted to the fourth isolator chip via the third isolator chip, the second circulator chip, the phase shifter chip, and the first circulator chip, and finally to the mixer chip.

[0043] Optical fibers are extremely sensitive to environmental disturbances such as temperature and vibration, which can cause phase drift in the transmitted optical signal. Without phase compensation, the received signal at the far end will deviate from the original signal, affecting system accuracy. Therefore, the system splits a small amount of optical signal at the far-end receiver as a reference light, which is then returned to the transmitter via the same path. This reference light undergoes a secondary transmission path from the receiver to the optical fiber and then back to the transmitter, carrying a cumulative double phase disturbance. The disturbance is converted into a reference electrical signal and input into the closed-loop system through a reference receiving channel containing a photodetector chip and a cascaded isolator, so that the controller can obtain the quantized disturbance. The only data source; without this channel, the transmitter will be unable to achieve accurate closed-loop compensation due to the lack of phase disturbance feedback, resulting in phase stability failure.

[0044] Specifically, when the stable phase transmission channel carries the second phase-shifted signal and transmits it through the optical fiber to the receiving end, a phase disturbance is generated. Let the phase disturbance be... The reference receiving channel, when returning the reference electrical signal generated at the receiving end to the transmitting end via the same optical fiber, is superimposed with a secondary disturbance. This results in a total disturbance of 2 in the reference electrical signal. The phase shifter chip applies the same phase shift value to the second phase-shifted signal and the reference electrical signal under the control of the controller chip at the same voltage. This enables the second phase-shifting signal to be pre-compensated. The signal is then output to an optical fiber, so the final signal phase at the receiving end is... + Meanwhile, the phase of the reference electrical signal input to the mixer after phase shifting is... + The mixer outputs a phase detection voltage by comparing the phase of the first reference electrical signal, i.e., the reference 0 phase, with the phase of the reference electrical signal. ,have The controller adjusts the phase shift value. force =0, that is + =0. At this time... =- This makes the phase of the received signal... This exactly offsets the round-trip disturbance 2 This dual-channel phase compensation mechanism reduces the impact on the system, thereby achieving phase stability. It applies an equal phase shift to the second phase-to-shift signal and the reference electrical signal simultaneously using the same phase shifter chip, thus mitigating the impact of fiber optic round-trip disturbances. The precise compensation significantly improves the compensation efficiency compared to traditional single-channel solutions. At the same time, it reduces the amount of phase-shifting devices used, significantly reducing system complexity and the risk of phase mismatch. Combined with optoelectronic hybrid integration technology, it ensures phase stability and isolation in high-frequency scenarios.

[0045] S4. The mixer chip mixes the first reference electrical signal and the phase-shifted feedback electrical signal to generate and output a phase detection voltage.

[0046] Among them, due to fiber phase perturbation The essence is the shift in the signal phase dimension; ordinary voltage can only reflect amplitude information and cannot quantify the phase difference. A mixer chip is used to mix the first reference electrical signal (phase reference 0) and the phase-shifted reference electrical signal (phase reference 0). + Mixing is performed using the phase difference between the two channels. = + The coherent interaction of signals at the same frequency converts the abstract phase difference into a linearly correlated baseband voltage signal. (i.e., phase detection voltage), this voltage value directly characterizes fiber disturbance. With compensation amount The algebraic relationship; the controller chip depends on the polarity of this voltage (indicator). And the compensation amount required for accurate amplitude calculation If replaced with a normal voltage, such as a signal power voltage, the closed loop will fail due to the loss of phase information.

[0047] Specifically, the phase of the phase-shifted reference electrical signal is characterized by the fiber optic single-pass perturbation. With phase shift value The sum of + The first reference electrical signal (phase reference 0) is input together with the first reference electrical signal into a microwave monolithically integrated mixer chip for mixing. The process is as follows: the power divider divides the first reference electrical signal. After the round trip, a total of 2 phases were carried. Mixing operation through an ideal multiplier Then, use a low-pass filter to remove high-frequency components. The DC term was then obtained. K is the proportional coefficient calculated for the DC term. Then, the baseband phase detector voltage is output. ,in In other words, It is the phase difference The cosine function mapping is used by the controller chip to calculate the magnitude of the disturbance. The generated phase detection voltage is converted into a digital signal by the ADC, processed by the controller chip using a proportional-integral algorithm, and outputs a control voltage Vc, which is ultimately fed back to the phase shifter chip to achieve closed-loop regulation. The mechanism of generating phase detection voltage significantly improves the accuracy of closed-loop compensation, effectively suppresses high-frequency noise, and ensures stable phase reliability.

[0048] S5. The controller chip generates a control voltage based on the phase detection voltage and dynamically adjusts the phase shift value of the phase shifter chip.

[0049] The controller chip acquires the phase detection voltage Vd output by the mixer chip through a high-speed analog-to-digital converter, quantizes it into a digital signal, and then calculates the compensation required by the phase shifter chip in real time based on a proportional-integral (PI) control algorithm. The process is as follows: First, the instantaneous value of the phase deviation is calculated. Kd represents the phase detection sensitivity of the mixer chip. The steady-state error is then eliminated by integrating and accumulating historical deviation values, resulting in the output digital control quantity. Where Kp is the proportional coefficient of the digital control quantity, and Ki is the integral coefficient. This is the control cycle. The digital control quantity is converted into an analog control voltage Vc by a digital-to-analog converter and applied to the voltage control port of the phase shifter chip; the phase shifter chip linearly adjusts its bidirectional phase shift value according to Vc. α is the phase-shifting sensitivity, forming a closed-loop response.

[0050] S6. The second phase-shifted signal, after phase-shifting processing, is converted into a phase-stable optical signal output through electro-optic modulation.

[0051] It should be noted that adding a low-noise amplifier chip to improve the link signal power, adding an adjustable attenuator chip to adjust the link power, and adding an equalizer chip to adjust the flatness at any location in the device of the present invention are all conventional methods and are included in the claims of the present invention.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A photoelectric integrated stable phase light emitting device, characterized in that, include: The power divider chip is used to receive a stable phase RF signal and decompose the signal into a first reference electrical signal and a second phase-shifting signal of the same origin. A stable phase transmission channel, with its input end connected to the second output end of the power divider chip, is used to transmit the second phase-shifting signal; The reference receiving channel has its input end connected to a photodetector chip, which is used to receive the feedback electrical signal after photoelectric conversion of the reference optical signal fed back from the remote end. The phase shifter chip is bidirectionally connected to the stable phase transmission channel and the reference receiving channel, and is used to perform equal phase shift on the signals in the two channels. The phase shift value is adjusted in real time by an external control voltage. The mixer chip has a first input terminal connected to the first output terminal of the power divider chip to receive a first reference electrical signal, a second input terminal used to receive a phase-shifted feedback electrical signal, and an output terminal generating a phase detection voltage. The controller chip has its input terminal connected to the output terminal of the mixer chip. It generates the phase-shifting control voltage based on the phase-detection voltage and feeds it back to the phase-shifter chip. The electro-optic modulation core assembly, with its input end connected to the output end of the phase-stable transmission channel, is used to convert the second phase-shifted signal after phase-shifting into a phase-stable output optical signal.

2. The optoelectronic integrated phase-stabilized light emitting device according to claim 1, characterized in that, The stable phase transmission channel includes a first transmission channel and a second transmission channel; The first transmission channel is integrated from a first isolator chip and a first circulator chip; the second transmission channel is integrated from a second circulator chip and a second isolator chip; the first transmission channel and the second transmission channel are connected through a phase shifter chip.

3. The optoelectronic integrated stable phase-emitting light emitting device according to claim 2, characterized in that, The connection relationship between the first transmission channel and the second transmission channel includes: The first isolator chip has its input terminal connected to the second output terminal of the power divider chip to receive the second phase-shifting signal. The first circulator chip has its first port connected to the output of the first isolator chip, and the signal is transmitted from the first port to the second port for output. The input terminal of the phase shifter chip is connected to the output of the second port of the first circulator chip. The second circulator chip has its second port connected to the output of the phase shifter chip, and the signal is transmitted from the second port to the third port for output. The second isolator chip has its input end connected to the third port output of the second circulator chip, and its output end connected to the electro-optic modulation chip assembly.

4. The optoelectronic integrated phase-stabilized light emitting device according to claim 1, characterized in that, The reference receiving channel includes a first reference channel and a second reference channel; The first reference channel is integrated from the third isolator chip and the second circulator chip; the second reference channel is integrated from the first circulator chip and the fourth isolator chip; the first reference channel and the second reference channel are connected through a phase shifter chip.

5. The optoelectronic integrated phase-stabilized light emitting device according to claim 4, characterized in that, The connection relationship between the first reference channel and the second reference channel includes: The third isolator chip has its input terminal connected to the output terminal of the photodetector chip. The second circulator chip has its first port connected to the output of the third isolator chip, and the signal is transmitted from the first port to the second port for output. The input terminal of the phase shifter chip is connected to the second port output of the second circulator chip; The first circulator chip has its second port connected to the output of the phase shifter chip, and the signal is transmitted from the second port to the third port for output. The fourth isolator chip has its input terminal connected to the third port output of the first circulator chip, and its output terminal connected to the second input terminal of the mixer chip.

6. The optoelectronic integrated phase-stabilized light emitting device according to claim 1, characterized in that, The photodetector chip is used to convert the received reference optical signal into a feedback electrical signal.

7. The optoelectronic integrated phase-stabilized light emitting device according to claim 1, characterized in that, The electro-optic modulation chip is a single direct-modulation laser chip or a combination of a laser chip and an electro-optic modulator chip. The combination of laser chip and electro-optic modulator chip includes: a laser chip used to output a laser source; The electro-optic modulator chip is used to receive the second phase-shifted signal and the laser source after phase shifting, and output a phase-stable output optical signal.

8. A photoelectric integrated stable phase light emission method, characterized in that, include: S1. Receive the stable phase RF signal through the power divider chip, and decompose the stable phase RF signal into a first reference electrical signal and a second phase-shifting signal of the same origin. S2. The second phase-shifting signal is transmitted to the electro-optic modulator chip through the first isolator chip, the first circulator chip, the phase shifter chip, the second circulator chip, and the second isolator chip. After conversion by the electro-optic modulator chip, a stable phase optical signal is output. S3. The photodetector chip receives the reference optical signal and converts it into a feedback electrical signal. The feedback electrical signal is then transmitted to the fourth isolator chip via the third isolator chip, the second circulator chip, the phase shifter chip, and the first circulator chip, and finally to the mixer chip. S4. The mixer chip mixes the first reference electrical signal and the phase-shifted feedback electrical signal to generate and output a phase detection voltage. S5. The controller chip generates a control voltage based on the phase detection voltage and dynamically adjusts the phase shift value of the phase shifter chip.

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