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Tunable laser wavelength searching method and device

A technology for tuning lasers and lasers, which is applied in the field of optical communication and can solve the problems of difficulty in obtaining the corresponding relationship between the tuning current and the wavelength of the tunable laser.

Pending Publication Date: 2021-09-14
GUANGXUN SCI & TECH WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention solves the problem of difficulty in obtaining the corresponding relationship between tuning current and wavelength of existing tunable lasers

Method used

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  • Tunable laser wavelength searching method and device
  • Tunable laser wavelength searching method and device
  • Tunable laser wavelength searching method and device

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Embodiment 1

[0038] For a typical SGDBR laser, the typical distribution law of the output wavelength in the plane of the front grating current IF and the back grating current IB is as follows: figure 1 shown. The wavelength of the light emitted by the laser is in the plane of the combination of the front grating current and the rear grating current, and its distribution is not continuous. figure 1The figure shows that each diagonal region divided by the five boundaries of 11-51 corresponds to a specific pair of reflection peaks in the comb-shaped reflection peaks generated by the front and rear grating currents, and the wavelength will appear at the boundary of the diagonal region. Jump. In the actual use of the laser, the boundary shape of the wavelength hopping is approximately straight but not regular. For simplicity, figure 1 The mid-wavelength distribution jump boundary 11-51 is indicated by a straight line. At the same time, in the same diagonal area, the wavelength distribution i...

Embodiment 2

[0086] On the basis of the method for searching the wavelength of the tunable laser provided in the above-mentioned embodiment 1, the present invention also provides a device for searching the wavelength of the tunable laser that can be used to realize the above method, such as Figure 14 Shown is a schematic diagram of the device architecture of the embodiment of the present invention. The device for tunable laser wavelength search in this embodiment includes one or more processors 11 and memory 12 . in, Figure 14 A processor 11 is taken as an example.

[0087] Processor 11 and memory 12 can be connected by bus or other means, Figure 14 Take connection via bus as an example.

[0088] Memory 12 is a non-volatile computer-readable storage medium for a tunable laser wavelength search method, and can be used to store non-volatile software programs, non-volatile computer-executable programs and modules, such as the tunable laser in Embodiment 1. Laser wavelength search metho...

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Abstract

The invention relates to the field of optical communication, in particular to a tunable laser wavelength searching method and device. The method mainly comprises the steps of selecting initial combination paths of at least two groups of scanning currents; obtaining characteristic points of laser wavelengths in each group of initial combined paths, and fitting the characteristic points in different initial combined paths belonging to the same mode to obtain a characteristic combined path; scanning along the feature combination path, and extracting grid centers of feature grids in the feature combination path; and adjusting the fixed current, and obtaining the grid center of the characteristic grid under each adjusted fixed current so as to obtain the corresponding relation of the wavelength, the phase node current value, the front grating current value and the rear grating current value in the laser tuning range. According to the method, the process is rapid, simple and convenient, the universality is high, and the tuning current value of the SGDBR tunable laser at any wavelength point in the tuning range can be obtained through the change rule of the corresponding relation of the combination of IP, IF and IB and the wavelength.

Description

【Technical field】 [0001] The invention relates to the field of optical communication, in particular to a method and device for searching the wavelength of a tunable laser. 【Background technique】 [0002] With the continuous optimization of semiconductor laser structure and performance, its application in the field of communication is becoming more and more extensive. Tunable semiconductor lasers have the function of dynamically adjusting the output wavelength, which makes them have unique application value in wavelength routing, dynamic network configuration, optical cross-connect, wavelength conversion, and optical burst switching and optical packet switching systems. Among them, the Distributed Bragg Reflector (DBR for short) tunable laser with fast wavelength switching speed has a large tuning range and high spectral quality, so it has attracted much attention. The early three-segment DBR laser consists of three parts: active area, phase area, and grating area. Its worki...

Claims

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Application Information

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IPC IPC(8): G06K9/00H01S5/125
CPCH01S5/125G06F2218/08
Inventor 胡蕾蕾张博成璇璇韩燊
Owner GUANGXUN SCI & TECH WUHAN
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