CN-121983848-A - Method and device for controlling frequency offset of coherent simplified optical module laser

CN121983848ACN 121983848 ACN121983848 ACN 121983848ACN-121983848-A

Abstract

The invention relates to the technical field of optical modules, and provides a method and a device for controlling frequency offset of a coherent simplified optical module laser. According to the invention, the current adjustable module for obtaining the frequency offset adjusting right is determined according to the preset arbitration mechanism, the current adjustable module is subjected to frequency offset locking, and the module frequency offset in the current system is sequentially adjusted based on the arbitration mechanism, so that the frequency locking of the local oscillator and the frequency of the received signal light is realized, and the problem that the synchronous frequency of the local oscillator and the frequency of the received signal light of the receiving end cannot be ensured because the ‌ coherent simplified version optical module cannot acquire the working frequency of the current laser is solved.

Inventors

CHEN JIANYU
CHEN HONGGANG
DING LAN
SONG NING
CHENG YUAN
LUO YONG
ZHANG BO

Assignees

武汉光迅科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260105

Claims (10)

1. A method for controlling frequency offset of a coherent simplified optical module laser is characterized by comprising the following steps: determining a current adjustable module for obtaining the frequency offset adjustment weight according to a preset arbitration mechanism; and performing frequency offset locking adjustment on the current adjustable module.
2. The method for controlling frequency offset of a coherent reduced optical module laser according to claim 1, wherein determining a current adjustable module for obtaining frequency offset adjustment rights according to a preset arbitration mechanism comprises: acquiring the current frequency offset of a module to be processed for multiple times; and if the current frequency deviation of the to-be-processed module is in the same threshold range each time, determining the to-be-processed module as a current adjustable module.
3. The method of controlling frequency offset of a coherent reduced optical module laser according to claim 2, further comprising: And if at least one time the current frequency offset of the to-be-processed module is not in the same threshold range exists, waiting for preset time, and acquiring the current frequency offset of the to-be-processed module again and again until the current frequency offset of the to-be-processed module is in the same threshold range each time, and determining the to-be-processed module as a current adjustable module.
4. The method for controlling frequency offset of a coherent reduced optical module laser according to claim 1, wherein said performing frequency offset locking adjustment on said current adjustable module comprises: Acquiring the current frequency deviation of the current adjustable module; Determining a mapping relation between temperature and laser frequency, and calculating a temperature adjustment quantity corresponding to the current frequency offset according to the mapping relation; And adjusting the working temperature of the laser according to the temperature adjustment quantity.
5. The method of claim 4, wherein adjusting the operating temperature of the laser according to the temperature adjustment amount comprises: determining a temperature target value of the laser according to the current temperature of the laser and the temperature adjustment quantity; Locking the temperature of the laser to the temperature target value; Comparing the locked current frequency offset with the current frequency offset of the current adjustable module before locking; If the current frequency offset after locking is smaller than the current frequency offset before locking, continuing to adjust the working temperature to finish the frequency offset locking adjustment of the current adjustable module; and if the current frequency offset after locking is greater than or equal to the current frequency offset before locking, stopping performing frequency offset locking adjustment on the current adjustable module.
6. The method of claim 5, wherein continuing to adjust the operating temperature if the locked current frequency offset is less than the pre-locking current frequency offset comprises: And iteratively calculating the temperature adjustment quantity corresponding to the current frequency offset obtained at this time according to the mapping relation on the basis of the current adjustment direction, adjusting the working temperature of the laser according to the temperature adjustment quantity at this time, and obtaining the current frequency offset of the current adjustable module after locking at this time until the current frequency offset after locking is within a threshold range, thereby completing the frequency offset locking adjustment of the current adjustable module.
7. The method for controlling frequency offset of a coherent reduced optical module laser according to any one of claims 1 to 6, further comprising, after said performing frequency offset locking adjustment on said current adjustable module: Re-acquiring the current frequency offset of the current adjustable module; when the newly acquired current frequency offset is not in the threshold range of the preset multiple, enabling the current adjustable module to acquire the frequency offset adjustment weight again; and performing frequency offset locking adjustment on the current adjustable module so as to adjust the re-acquired current frequency offset to be within a threshold range.
8. The method for controlling frequency offset of a coherent reduced optical module laser according to any one of claims 1 to 6, further comprising: When a plurality of modules to be processed exist, ‌ modules to be processed which do not acquire the frequency offset adjusting weight wait temporarily; when the frequency offset locking adjustment of the current adjustable module is completed, the ‌ to-be-processed module docked with the receiver of the current adjustable module strives for the frequency offset adjustment weight to be used as a new current adjustable module when the frequency offset adjustment weight is acquired; and performing frequency offset locking adjustment on the new current adjustable module so as to iteratively enable the current frequency offset of all the modules to be processed to be within a threshold range.
9. The device for controlling the frequency offset of the coherent thin-film optical module laser is characterized by comprising at least one processor and a memory, wherein the at least one processor and the memory are connected through a data bus, the memory stores instructions which can be executed by the at least one processor, and the instructions are used for realizing the method for controlling the frequency offset of the coherent thin-film optical module laser according to any one of claims 1-8 after being executed by the processor.
10. A non-volatile computer storage medium having stored thereon computer executable instructions for execution by one or more processors for performing the method of coherent reduced version optical module laser frequency offset control of any of claims 1-8.

Description

Method and device for controlling frequency offset of coherent simplified optical module laser Technical Field The invention relates to the technical field of optical modules, in particular to a method and a device for controlling frequency offset of a coherent simplified optical module laser. Background A coherent optical module is an apparatus for a coherent optical communication system that uses the coherence of light to achieve modulation and demodulation of an optical signal. Coherent optical modules typically contain components such as lasers, modulators, receivers, etc. for transmitting and receiving optical signals. A compact optical module refers to an optical module that is simplified and optimized in design to reduce cost, improve performance, or meet the needs of a particular application scenario, for example, by reducing certain components or by employing more efficient integration techniques. Lasers are key components in optical modules for producing optical signals of high stability and high coherence. In coherent optical communication, the frequency stability, line width and phase stability of a laser are critical to communication performance, and the frequency of the laser is affected by factors such as temperature, current and the like, so that the output frequency of the laser needs to be stabilized by a frequency locking technology. The basic principle of the frequency deviation locking technology is to measure beat frequency signals (namely, frequency differences) of output light of two lasers and adjust the frequency of one of the lasers by using a feedback system so that the frequency difference between the two lasers and a reference laser is kept constant. ‌ Coherent light modules (Coherent Lite) use fixed wavelength O-band lasers, and 1310 nm (i.e., 228.85 terahertz) optical signals are widely adopted as current protocol standards, with frequency accuracy of + -10 gigahertz. For normal communication in an actual communication system, it is necessary to lock the frequency difference between the local oscillator and the frequency of the received signal light within ±3 gigahertz, and for system stability, it is necessary to control the frequency difference between the Local Oscillator (LO) and the frequency of the received signal light within ±0.9 gigahertz. Because of the design of the laser of ‌ Coherent reduced (Coherent Lite) optical modules in the prior art, two ‌ Coherent reduced optical modules which are mutually communicated cannot know the current working frequency of the laser. The coherent optical communication system must maintain ‌ the synchronization between the local oscillator in the coherent reduced-form optical module and the optical frequency of the received signal at the receiving end, so as to ensure that the received signal can be correctly demodulated and processed. Therefore, the synchronization of the local oscillator and the frequency of the received signal light needs to be realized based on the existing design of ‌ coherent simplified optical modules so as to improve the practicability of the coherent optical communication system. In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art. Disclosure of Invention The invention aims to provide a method and a device for controlling frequency offset of a coherent simplified optical module laser, which aim to determine a current adjustable module for obtaining frequency offset adjusting weight according to a preset arbitration mechanism, carry out frequency offset locking adjustment on the current adjustable module, and sequentially adjust module frequency offset in a current system based on the arbitration mechanism, thereby realizing frequency locking of a local oscillator and the frequency of received signal light, and solving the problem that the synchronization of the frequency of the received signal light of a local oscillator and a receiving end cannot be ensured because ‌ coherent simplified optical module cannot acquire the working frequency of the current laser. The invention adopts the following technical scheme: in a first aspect, the present invention provides a method for controlling frequency offset of a coherent reduced version optical module laser, including: determining a current adjustable module for obtaining the frequency offset adjustment weight according to a preset arbitration mechanism; and performing frequency offset locking adjustment on the current adjustable module. Further, the determining, according to a preset arbitration mechanism, the current adjustable module for obtaining the frequency offset adjustment right includes: acquiring the current frequency offset of a module to be processed for multiple times; and if the current frequency deviation of the to-be-processed module is in the same threshold range each time, determining the to-be-processed module as a current adjustable module. Further, the method further comprises: if the current freq