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Amplifying system of parallel injection fibre power

A power amplification and amplification system technology, which is applied in the direction of lasers, laser components, and the structure/shape of active media, can solve problems such as system instability and many serial stages in optical fiber power amplification systems, so as to improve efficiency and safety Resilience, increased power of injected seeds, easy-to-achieve effects

Active Publication Date: 2013-01-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fiber power amplifier system (PIPA, Parallel Injection Power Amplifier) ​​with parallel injection of multi-beam lasers, so as to solve the problem that the optical fiber power amplifier system in the prior art has many serial stages and the system is unstable. And other issues

Method used

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  • Amplifying system of parallel injection fibre power
  • Amplifying system of parallel injection fibre power
  • Amplifying system of parallel injection fibre power

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Embodiment 1

[0030] figure 2 It is a structural diagram of an amplification system using multiple all-fiber single-mode seed sources for parallel injection according to an embodiment of the present invention.

[0031] In this embodiment, the amplifying system is provided with 7 lasers 1, the laser 1 is an all-fiber structure single-mode fiber laser oscillator 1a, and the beam combining device 2 has 7 single-mode input fibers and a The single-mode-multimode beam combiner 2a of the multimode output fiber, the optical fiber power amplifier 3 includes (N+1) × 1 beam combiner 31 (N is an integer greater than or equal to 1, and in this embodiment N is 6 ), 6 pumping devices 32 and a double-clad gain fiber 33a as a gain fiber.

[0032] Each single-mode fiber laser oscillator 1a includes an oscillator pumping device 11, a single-mode double-clad gain fiber 12a, two 7×1 beam combiners 13 and two fiber gratings 14, and the pump light passes through two The 7×1 beam combiner 13 is injected into th...

Embodiment 2

[0036] like image 3 Shown is a structural diagram of an amplification system using multiple discrete single-mode fiber seed sources for parallel injection according to Embodiment 2 of the present invention. Depend on image 3 and figure 2 It can be seen that this embodiment is similar to Embodiment 1, except that: 1) the laser 1 of this embodiment is a discrete structure single-mode fiber laser oscillator 1b, and the discrete structure single-mode fiber laser The output laser of the oscillator 1b is input to the single-mode fiber input end of the single-mode-multimode beam combiner 2a through a discrete coupling optical element 5 (the discrete coupling optical element 5 in this embodiment is a coupling lens) ; 2) The gain fiber of this embodiment is a tapered double-clad gain fiber 33b, and the use of the tapered double-clad gain fiber 33b helps the fiber power amplifier to obtain an output with better beam quality.

[0037] The discrete structure single-mode fiber laser ...

Embodiment 3

[0040] Figure 4 It is a structural diagram of an enlarged system using multiple single-mode solid seed sources for parallel injection according to Embodiment 3 of the present invention. Depend on Figure 4 It can be seen that this embodiment is similar to Embodiment 1, except that the laser 1 in this embodiment is a single-mode solid-state laser oscillator 1c, and the output of the single-mode solid-state laser oscillator 1c is passed through a discrete The coupling optical element 5 (the discrete coupling optical element 5 in this embodiment is a coupling lens) is input to the single-mode fiber input end of the single-mode-multimode beam combiner 2a.

[0041] The single-mode solid-state laser oscillator 1c includes an oscillator pumping device 11 , a lens group 16 , a laser crystal 17 and two coated cavity mirrors 15 on both sides of the laser crystal 17 . The pump light is coupled to the laser crystal 17 through the lens group 16, and the generated laser light is coupled ...

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Abstract

The invention discloses an amplifying system of a parallel injection fibre power, comprising lasers and a fibre power amplifier, wherein the amplifying system comprises a plurality of lasers in parallel, and the lasers are used as a plurality of seeds of the fibre power amplifier; the amplifying system further comprises a beam combining device which is provided with a plurality of input ends and an output end; the output ends of the plurality of lasers are connected with a plurality of input ends of the beam combining device respectively so as to combine the outputs of a plurality of lasers; the output end of the beam combining device is connected with an input end of the fibre power amplifier. By adopting the parallel injection manner by the plurality of lasers, the injection seed power of the fibre laser amplifying stage is largely improved, the number of stages of a series link amplifying grade is reduced, the efficiency and safety of the system are improved, so that the entire system is simple and stable in structure, and easy to implement.

Description

technical field [0001] The invention relates to the technical field of optical fiber power amplification, in particular to an optical fiber power amplification system using parallel injection of multiple laser beams. Background technique [0002] In the field of fiber lasers, the high output power of lasers has become one of the main directions for the development of fiber laser systems. At present, the main method to achieve high-power laser output is to use the main oscillation power amplifier system (MOPA, Main Oscillation Power Amplifier), that is, in the case of single seed injection, the low-power signal light is amplified to the required required high-power lasers. However, in a multi-stage amplified system, the serial system structure makes the whole system less stable, and any problem in any amplifying stage will affect the output of the whole system and even cause damage. In order to achieve higher power system output, generally more amplification stages are requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/091
Inventor 巩马理闫平郝金坪肖起榕
Owner TSINGHUA UNIV