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High-power pump laser group driving and control protection method

A pump laser, control and protection technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of poor environmental adaptability, the pump laser group cannot continue to work, and it is difficult to accurately grasp the use status of the laser. The effect of balanced use

Active Publication Date: 2007-08-15
GUANGXUN SCI & TECH WUHAN
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Problems solved by technology

But on the other hand, the use of uncooled lasers and air-cooled working methods has poor environmental adaptability. For example, when the laser experiences different temperature environments during operation, its aging rate is different. Because the temperature environment changes are difficult to predict, it is difficult to accurately Grasp the use status of the lasers. For the multi-pump combination structure, if the use status of each laser cannot be controlled, it is easy to cause excessive use of individual lasers, resulting in premature failure, so that the entire pump laser group cannot continue to work

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  • High-power pump laser group driving and control protection method

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[0066] Further description will be given below in conjunction with the accompanying drawings and embodiments.

[0067] The composition of the cladding-pumped high-power fiber amplifier is shown in Figure-1, mainly including double-clad gain fiber 1, fiber multiplexer 2, optical isolator 3, 4, pump laser group and its driver 5, and fiber coupler 6, 7, photodetectors 8, 9 and sampling detection and general controller 10 several parts. The size and stability of the output power are the main technical indicators of the power amplifier. The cladding-pumped high-power fiber amplifier controls the drive setting of the pump laser group by sampling and comparing the photodetector at the output end, so as to realize the stability of the output power.

[0068] The pump laser group 5 is composed of several pump lasers, and the pump lasers are packaged without refrigeration. Its overall structure is shown in Figure-2. Under working conditions, the controller first distributes the power o...

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Abstract

The drive and control protection method for a large-power pumping laser assembly comprises: real-time monitoring the heat sink temperature and drive current for every pumping laser, counting laser working time, and using the product of counted time and life factor to estimate laser service time; according to balance principle on life service and heat sink temperature, adjusting power allocation to properly reduce / add the drive power for laser with higher / lower estimated life value. This invention makes multiple laser aging level toward consistent.

Description

technical field [0001] The invention relates to a driving control circuit realization method of a pumping laser group, in particular to a state monitoring and coordination working method of an unrefrigerated high-power pumping laser group used for cladding pumping optical fiber amplifiers. Background technique [0002] With the continuous advancement of access network FTTH, the demand for high-power optical fiber amplifiers is increasing. The latest high-power fiber amplifier adopts multi-mode double-clad pumping technology. The amplifier uses ytterbium / erbium co-doped double-clad fiber as the gain medium, and the pump light is input to a cross-section hundreds to thousands of times that of a single-mode fiber. Therefore, under the same input optical density, multimode cladding pumping can allow hundreds to thousands of times the pump light input of single-mode pumping, making it easy to realize optical fiber High power or super high power output of the amplifier. Since th...

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Application Information

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IPC IPC(8): H01S3/094H01S3/00
Inventor 傅焰峰龙浩张石余春平
Owner GUANGXUN SCI & TECH WUHAN
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