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Blue laser generation method and device based on quadruple frequency doubling of thulium-doped fiber laser

A fiber laser and generation device technology, applied in the field of optics, can solve the problems of low output beam quality of blue light laser, low output power of near-infrared LD, and limitation of output power of blue light laser, so as to improve the efficiency of one-stage frequency doubling and weight Lightweight, easy-to-use effect

Inactive Publication Date: 2015-12-23
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

The blue laser output beam quality obtained by direct frequency doubling of the near-infrared LD is not high, and the output power of the near-infrared LD suitable for the wavelength band is not high, so the output power of the blue laser is limited.
[0007] In conclusion, in the current blue laser generation methods, it is difficult to obtain high power output while maintaining high beam quality.

Method used

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  • Blue laser generation method and device based on quadruple frequency doubling of thulium-doped fiber laser
  • Blue laser generation method and device based on quadruple frequency doubling of thulium-doped fiber laser

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Embodiment Construction

[0032] In the following, specific implementations of the present invention will be described according to the two working modes of extracavity frequency doubling and intracavity frequency doubling respectively.

[0033] figure 1 It is a schematic diagram of a quadrupled frequency blue laser generating device in the extracavity frequency doubling working mode of the present invention. It includes a thulium-doped fiber laser unit A1, a primary frequency doubling unit A2 and a secondary frequency doubling unit A3; the thulium-doped fiber laser system A1 is used to generate high-power, high-beam quality 1.8 μm ~ 2 μm laser, and the thulium-doped fiber laser unit The output light of A1 is quadrupled by the primary frequency doubling unit A2 and the secondary frequency doubling unit A3 to produce blue laser output.

[0034] The thulium-doped fiber laser unit A1 includes a thulium-doped gain fiber 4, a pump beam combiner 2, a high reflection fiber grating 3, a low reflection fiber g...

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Abstract

The invention discloses a thulium-doped fiber laser-based method and a thulium-doped fiber laser-based device for generating quadruplicated frequency blue laser; the method and the device utilize the characteristics that a thulium-doped fiber laser is high in output power and good in light beam quality; and the 450-500nm blue laser with higher power can be obtained by carrying out frequency multiplication on 1.8-2mu. m laser output by the thulium-doped fiber laser for twice. By adopting the structural form of combining the fiber laser and a crystal optical element, the device is simple in structure and convenient to use, can guarantee better light beam quality while outputting high power, and realizes integration and modularization of a system.

Description

technical field [0001] The invention relates to the field of optics, in particular to a method and device for obtaining blue light laser based on the quadrupling frequency technology of a thulium-doped fiber laser. Background technique [0002] Blue light laser has important application value in the fields of high-density storage, underwater detection and communication, color laser display and medicine. Based on the characteristics of short wavelength and small spot area of ​​blue light laser, blue light storage can greatly increase the spectral storage capacity. Since the blue light wavelength is in the seawater window, the use of blue light laser for underwater communication is an important means to improve the communication rate of submarines. As one of the three primary colors, blue laser plays an important role in the field of display and biological detection. [0003] At present, the main means of obtaining blue light laser are: [0004] 1. The semiconductor laser d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/109
Inventor 陶蒙蒙陈绍武易爱平于力王振宝杨鹏翎叶锡生
Owner NORTHWEST INST OF NUCLEAR TECH
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