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Distributed Bragg reflector (DBR) tunable laser source system and control method thereof

A laser light source, laser technology, applied in lasers, laser parts, semiconductor lasers, etc., can solve problems such as the tuning and control method of double-branched DBR lasers that have not been seen, and achieve fast and accurate wavelength tuning, long service life, and accurate tuning speed. Effect

Inactive Publication Date: 2012-06-27
桂林优西科学仪器有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in order for a double-branched DBR laser to output a laser of a specific frequency, it is necessary to control the injection currents of the Bragg mirrors and phase regions of the two-branched DBR lasers, and to adjust their output power. At present, there is no dual-branched DBR The laser-based tunable laser light source system is available, and there is no report on the practical tuning control method for the double-branch DBR laser

Method used

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  • Distributed Bragg reflector (DBR) tunable laser source system and control method thereof
  • Distributed Bragg reflector (DBR) tunable laser source system and control method thereof
  • Distributed Bragg reflector (DBR) tunable laser source system and control method thereof

Examples

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Effect test

Embodiment 1

[0044] Embodiment 1 of the DBR tunable laser light source system includes a double-branch DBR laser, a microprocessor, six controllable current sources and a semiconductor thermoelectric cooler. The double-branched DBR laser such as figure 1 As shown, it includes the gain region, the phase region and the upper Bragg mirror branch (upper branch), the lower Bragg mirror branch (lower branch) and the semiconductor optical amplifier (SOA). The semiconductor optical amplifier is connected to the gain region, and the two control the output power. The obtained laser light is distributed to two Bragg mirror branches after passing through the phase area. The double-branched DBR laser is placed on a semiconductor thermoelectric cooler (TEC) to keep it working at a constant temperature.

[0045] The wavelength modes of the branches of the upper and lower Bragg mirrors are as follows figure 2 , 3 As shown, the wavelengths of the emitted waves of the two branches can be individually ad...

Embodiment 2

[0050] In this example, the DBR tunable laser source system is connected to two double-branched DBR lasers, such as Figure 7 As shown, each double-branch DBR laser includes a gain region, a phase region, an upper Bragg mirror branch (upper branch), a lower Bragg mirror branch (lower branch), and two double-branch DBR lasers share a semiconductor optical amplifier ( SOA).

[0051] The control circuit of the DBR tunable laser light source system in this example is as follows: Figure 8 As shown, the microprocessor is equipped with a controllable current source A connected to control the semiconductor optical amplifier, and there are 2 groups of controllable current sources, and 1 group is controllable current sources B1~E1, which control the gain area of ​​one of the double-branched DBR lasers 1. Phase zone 1, upper Bragg mirror branch 1 (upper branch 1), lower Bragg mirror branch 1 (lower branch 1); the other group is controllable current source B2~E2, controlling another dou...

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Abstract

The invention relates to a distributed Bragg reflector (DBR) tunable laser source system and a control method thereof. The system comprises a double-branch DBR laser, a microprocessor and controllable current sources; all the controllable current sources which are connected with the microprocessor are respectively connected with the gain zone and the phase zone of the double-branch DBR laser, an upper and a lower Bragg reflector branches and a service-oriented architecture (SOA). The laser is arranged on a thermoelectric cooler (TEC) under the control of the microprocessor and maintained at constant temperature. The system can comprise n double-branch DBR lasers which share the same SOA. The control method comprises the following steps that: first, three pieces of injected current of the upper branch, the lower branch and the phase zone of the laser are alternatively changed, the wavelength and power that all current portfolios output are recorded, and the data of the current portfolios that all wavelengths correspond to is selected and stored; the current of the SOA is adjusted, so that the power which is output by all the wavelengths is the same; and a data calibration table is generated by interpolation, and the injected current which corresponds to all required wavelengths is obtained by referring to the table. When the system is connected with n double-branch lasers, calibration is carried out alternatively. According to the invention, the ms wavelength tuning is carried out quickly and accurately, the precision reaches + / -1pm, and the output power is a constant.

Description

(1) Technical field [0001] The invention relates to a tunable laser light source, in particular to a DBR tunable laser light source system and a control method thereof. (2) Background technology [0002] Tunable laser source (Tunable Laser Source) refers to a laser source whose output wavelength can be continuously changed within a certain range. High Speed ​​Tunable Laser Sources that can achieve millisecond-level tuning speeds are in great demand, but the current commercial fast tunable laser sources are very expensive and the output is small, so it is difficult to promote them in practical applications. . [0003] DBR (distributed Bragg reflective) laser is a distributed Bragg reflective laser, which is composed of an active region and a Bragg (Bragg) reflector. The Bragg reflector of the DBR laser can perform wavelength selection. In order to achieve fine tuning of the wavelength, DBR The laser is also equipped with a phase controller. The current is injected into the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/125H01S5/062
Inventor 李严王官俊赵克蒋红艳梁谦邓凌云
Owner 桂林优西科学仪器有限责任公司