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CN-116907796-B - Multi-channel laser emitter irradiation resistance test device applied to space environment

CN116907796BCN 116907796 BCN116907796 BCN 116907796BCN-116907796-B

Abstract

The invention provides a multi-channel laser emitter irradiation resistance test device applied to a space environment, which relates to the technical field of wireless high-speed laser communication and comprises a first test computer, an electric signal generator, a multi-channel space laser emitter, a radiation test box, a second test computer, a dense wavelength division multiplexer, a 1 multiplied by 2 optical switch, a tunable optical attenuator, a spectrum analyzer, a wavelength division demultiplexer, an N multiplied by 1 matrix switch, a beam splitter, an optical power meter, a tunable optical attenuator and an eye diagram instrument. According to the invention, a set of test platform is adopted to test various performance parameters output by the multi-wavelength laser in real time, and the system complexity of independent test of single parameters is reduced by matching with the electric signal generator and the dense wavelength division multiplexer, so that the test light path is simplified, the test time is shortened, the test efficiency is improved, and meanwhile, the stability and reliability of the test system are improved.

Inventors

  • WANG DASHUAI
  • WANG LE
  • TONG SHOUFENG
  • JIANG HUILIN
  • ZHANG PENG
  • NAN HANG
  • LIU JIANGUO
  • ZHAN FENG
  • ZHAO HONGMEI

Assignees

  • 长春理工大学

Dates

Publication Date
20260508
Application Date
20230714

Claims (8)

  1. 1. The multi-channel laser emitter irradiation resistance test device applied to the space environment is characterized by comprising a first test computer (1), an electric signal generator (2), a multi-channel space laser emitter (3), a radiation test box (4), a second test computer (5), a dense wavelength division multiplexer (6), a 1X 2 optical switch (7), a first adjustable optical attenuator (8), a spectrum analyzer (9), a wavelength division demultiplexer (10), an N X1 matrix switch (11), a beam splitter (12), an optical power meter (13), a second adjustable optical attenuator (14) and an eye diagram instrument (15); The first test computer (1) is connected with the electric signal generator (2) through a cable, the electric signal generator (2) is connected with the multipath space laser transmitters (3) through a cabin penetrating flange cable, the multipath space laser transmitters (3) are positioned in the radiation test box (4), the multipath space laser transmitters (3) are connected with multipath optical fiber input ends of the dense wavelength division multiplexer (6) through cabin penetrating flange multipath optical fiber outputs, and the output wavelengths of the multipath space laser transmitters (3) are in one-to-one correspondence with the channel wavelengths of the dense wavelength division multiplexer (6); the second test computer (5) is connected with the multipath space laser transmitters (3) through a cabin penetrating flange cable and is used for controlling and telemetering signals; the optical fiber output end of the dense wavelength division multiplexer (6) is connected with the optical fiber of the 1X 2 optical switch (7), the output port a of the 1X 2 optical switch (7) is connected with the first adjustable optical attenuator (8) through a cabin penetrating flange, and the output end of the first adjustable optical attenuator (8) is connected with the spectrum analyzer (9); The output port b of the 1X 2 optical switch (7) is connected with the input end of the demultiplexer (10) through optical fibers; n output ends of the wavelength division multiplexer (10) are connected with input ends of the N multiplied by 1 matrix switch (11) one by one through optical fibers; The output end of the N multiplied by 1 matrix switch (11) is in optical fiber connection with the input port of the beam splitter (12), the output port c of the beam splitter (12) is connected with the optical power meter (13), the output port d of the beam splitter (12) is connected with the input end of the adjustable optical attenuator II (14), and the output end of the adjustable optical attenuator II (14) is in optical fiber connection with the eye diagram instrument (15).
  2. 2. The multi-channel laser transmitter irradiation resistance test device applied to the space environment according to claim 1, wherein the first test computer (1) and the second test computer (5) are industrial computers, and the electric signal generator (2) and the multi-channel space laser transmitter (3) are controlled and remotely measured through R232 respectively.
  3. 3. The multi-channel laser transmitter irradiation resistance test device applied to the space environment according to claim 1, wherein the electric signal generator (2) is used for generating a driving electric signal, and the driving electric signal is used for controlling the multi-channel space laser transmitter (3).
  4. 4. The multi-channel laser transmitter irradiation resistance test device applied to the space environment according to claim 1, wherein the multi-channel space laser transmitter (3) is a combination of a plurality of laser modules, and the wavelength meets the requirement of dense wavelength division multiplexing optical communication.
  5. 5. The multi-path laser transmitter irradiation resistance test device applied to the space environment according to claim 1, wherein the radiation test box (4) internally comprises a Co 60 radiation source for generating adjustable radiation quantity.
  6. 6. The multi-channel laser transmitter irradiation resistance test device applied to the space environment according to claim 1, wherein the dense wavelength division multiplexer (6) is used for multiplexing multi-channel wavelengths, and the wavelengths meet the requirements of dense wavelength division multiplexing optical communication.
  7. 7. The multi-channel laser transmitter irradiation resistance test device applied to the space environment according to claim 1, wherein the optical power meter (13) is a photoelectric optical power meter and is used for sampling and recording the input optical power value in real time.
  8. 8. The multi-channel laser emitter irradiation resistance test device applied to the space environment according to claim 1, wherein the spectrum analyzer (9) is an optical fiber spectrum analyzer, and the wavelength precision and the resolution of the optical fiber spectrum analyzer meet the test requirements of a laser.

Description

Multi-channel laser emitter irradiation resistance test device applied to space environment Technical Field The invention relates to the technical field of wireless high-speed laser communication, in particular to an irradiation resistance test device of a multipath laser transmitter applied to a space environment. Background In recent years, high spatial-temporal resolution space cameras of space-based and terrestrial targets have become a focus of research in the field of modern optical observations. Because the existing space camera and other loads have the characteristics of high spectrum, high spatial resolution and the like, a large number of high-pixel images or high-definition videos can be generated in unit time of the loads. Thus, there is an urgent need for real-time transmission of large amounts of data in payload cabins, which data transmission rates can reach several hundred gigabits per second and even higher. Currently, the bandwidth of wireless microwave communication between cabins has not been able to meet such high-rate communication requirements. Optical communication has become a preferred choice for addressing this challenge due to its high communication rate, small size, light weight, etc. Semiconductor Lasers (LD) have been widely used in the field of space because of their small size, light weight, high efficiency, all-solid state, low cost, etc. In a spatial environment, a semiconductor laser will be affected by various rays and particle radiation, so its radiation effect mechanism must be well understood to avoid degradation and failure of device performance parameters. For this reason, accurate, complete, and full-process testing is required for each performance parameter of the laser to fully verify the reliability of the laser operation. National standards (GB/T31359-2015, GB/T21548-2021, GB/T42403-2023) provide basic specifications for testing methods of (semiconductor) lasers, and particularly comprise testing methods of spectral characteristics and power parameters. However, the traditional laser testing system has incomplete testing parameters, undefined parameters and debugging states of the tested components, and incapability of carrying out real-time monitoring and instant feedback on the laser parameters, so that a testing platform is complicated to build, has large testing errors, cannot carry out long-time stable testing, and simultaneously has slower testing on multi-wavelength laser transmitters and cannot meet the testing of space irradiation environments. Disclosure of Invention The invention provides a multi-wavelength laser testing system with high integration level and high reliability for improving the stability and reliability of the laser testing system, and can quickly and effectively overcome the problems, so that the multi-wavelength laser testing system is widely applied to the field of aerospace communication. The invention provides a multi-channel laser emitter irradiation resistance test device applied to a space environment, which comprises a first test computer, an electric signal generator, a multi-channel space laser emitter, a radiation test box, a second test computer, a dense wavelength division multiplexer, a1 multiplied by 2 optical switch, a first adjustable optical attenuator, a spectrum analyzer, a wavelength division demultiplexer, an N multiplied by 1 matrix switch, a beam splitter, an optical power meter, a second adjustable optical attenuator and an eye diagram instrument; The first test computer is connected with the electric signal generator through a cable, the electric signal generator is connected with the multipath space laser transmitters through a cabin penetrating flange cable, the multipath space laser transmitters are positioned in the radiation test box, the multipath space laser transmitters are connected with multipath optical fiber input ends of the dense wavelength division multiplexer through cabin penetrating flange multipath optical fiber outputs, and the output wavelengths of the multipath space laser transmitters are in one-to-one correspondence with the channel wavelengths of the dense wavelength division multiplexer; the second test computer is connected with the multipath space laser transmitters through a cabin penetrating flange cable and is used for controlling and telemetering signals; The output port a of the 1X 2 optical switch is connected with the adjustable optical attenuator through a cabin penetrating flange, and the output end of the first adjustable optical attenuator is connected with the spectrum analyzer; The output port b of the 1 x 2 optical switch is connected with the input end of the demultiplexer through optical fibers; N output ends of the wavelength division demultiplexer are connected with the input ends of the N multiplied by 1 matrix switch one by one through optical fibers; The output end of the N multiplied by 1 matrix switch is connected with the input port optical fiber of the bea