Polarization beam-combination device for pulsed laser

A pulsed laser and pulsed laser technology, applied in the laser field, can solve the problems of difficult-to-calibrate laser coherent synthesis, high precision and stability requirements, and large randomness, and achieve high crystal damage resistance threshold, good beam quality, and synthesis. Efficient effect

Inactive Publication Date: 2013-04-10
广东华快光子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The active phase-locked MOPA technology has a complex structure, and requires high precision and stability of the optical-electrical-optical phase detection and compensation system; the beam combining technology using evanescent field coupling does not require phase control and relies entirely on the evanescence of the system itself Wave coupling passive phase modulation is highly random and difficult to scale to coherent combination of multiple lasers; self-imaging focusing cavity technology has strict requirements on the length and spectral band of the gain medium and the loss value of the resonator, which limits its application

Method used

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  • Polarization beam-combination device for pulsed laser
  • Polarization beam-combination device for pulsed laser
  • Polarization beam-combination device for pulsed laser

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 2 As shown, it is a schematic diagram of coherent beam combining of two pulses in spatial polarization.

[0043] Pulse laser polarization beam combining device, including pulse laser 1, input beam splitter 2, first laser amplifier 3, first polarization controller 4, second laser amplifier 5, second polarization controller 6, phase control module 7, polarization A beam combiner 8 , an output beam splitter 9 , and a relative phase detection module 10 . The first polarization controller 4 , the second polarization controller 6 , the phase control module 7 , the polarization beam combiner 8 , and the output beam splitter 9 form a polarization coherent beam combining unit relative to the phase detection module 10 .

[0044] The pulsed laser 1 is a mode-locked laser with a solid or all-fiber structure, the central wavelength of the pulsed laser is 1030, 1064, 1550 nm, the repetition frequency of the pulsed laser is 20 kHz-100 MHz, and the average power of the...

Embodiment 2

[0050] Such as image 3 As shown, it is a schematic diagram of two-way pulsed all-fiber monopole amplified polarization coherent beam combining,

[0051] Pulse laser polarization beam combining device, including pulse laser 1, input beam splitter 2, first laser amplifier 3, first polarization controller 4, second laser amplifier 5, second polarization controller 6, phase control module 7, polarization A beam combiner 8 , an output beam splitter 9 , and a relative phase detection module 10 . The first polarization controller 4 , the second polarization controller 6 , the phase control module 7 , the polarization beam combiner 8 , and the output beam splitter 9 form a polarization coherent beam combining unit relative to the phase detection module 10 .

[0052] The pulse laser 1 is an all-fiber pulse laser, the center wavelength of the pulse laser is 1030, 1064, 1550nm, the repetition frequency of the pulse laser is 20kHz-100MHz, the average power of the pulse laser is tens of ...

Embodiment 3

[0060] Such as Figure 4 As shown, it is a schematic diagram of two-way pulse all-fiber multi-stage amplification polarization coherent beam combining,

[0061] Pulse laser polarization beam combining device, including pulse laser 1, input beam splitter 2, first laser amplifier 3, first polarization controller 4, second laser amplifier 5, second polarization controller 6, phase control module 7, polarization A beam combiner 8 , an output beam splitter 9 , and a relative phase detection module 10 . The first polarization controller 4 , the second polarization controller 6 , the phase control module 7 , the polarization beam combiner 8 , and the output beam splitter 9 form a polarization coherent beam combining unit relative to the phase detection module 10 .

[0062] The difference between the present embodiment and the second embodiment lies in the specific structures of the first laser amplifier 3 and the second laser amplifier 5 , and is the same as the second embodiment ex...

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Abstract

The invention discloses a polarization beam-combination device for a pulsed laser. The polarization beam-combination device comprises the pulsed laser, an input beam splitter, n laser amplifiers and n-1 polarization coherent beam-combination units. The pulsed laser outputs a beam of seed light. The input beam splitter divides the seed light into n sub-seed light beams. The n laser amplifiers respectively carry out power amplification to the n sub-seed light beams. The n-1 polarization coherent beam-combination units carry out pairwise polarization in-phase beam-combination for n-1 times to n laser beams output by the n laser amplifiers. N is a natural number which is bigger than or equal to two. An output end of the polarization beam-combination device is connected with an output beam splitter. A hard light output end of the output beam splitter is used as an output end of the polarization coherent beam-combination units. Light output from a low light output end of the output beam splitter shoots into a relative phase detection module of a drive phase control module, and the relative phase detection module enables phase positions of two laser beams to be consistent. Through adoption of a polarization detection method, the polarization beam-combination device detects the relative phase positions of the two laser beams, and is capable of achieving coaxial combination of a plurality of coherent light beams, high in combined efficiency and good in beam quality.

Description

technical field [0001] The invention relates to a pulsed laser polarization beam combining device and belongs to the field of laser technology. The device adopts the method of polarization coherent beam combining to control the relative phase of two pulsed lasers to realize the output of high-power pulsed lasers with linear polarization. Background technique [0002] High-power pulsed lasers have important application prospects in military fields such as laser weapons, laser rendezvous and docking, and laser fire control systems. Although high-power chemical lasers and solid-state lasers have been able to achieve weapon-level high-energy laser output, their brightness, cost, volume, beam quality and reliability still cannot meet the application requirements. Due to its small size, high stability, and good spot quality, high-power fiber lasers have become the fastest-growing technology and the most suitable high-energy lasers for installation on satellites, aircraft and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G02B27/09G02B6/27G02F1/11G02F1/01G02F1/39H01S3/10
Inventor 梁崇智杨康文
Owner 广东华快光子科技有限公司
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