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Erbium-doped fiber laser of random Raman fiber laser in-band pumping

A random laser and fiber laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of complex 1480 nm laser generation process, complex overall structure, and high overall cost, and achieve reduced implementation difficulty and high optical Efficiency, simple and compact structure

Inactive Publication Date: 2020-05-05
SHANGHAI PRECILASERS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the generation process of the 1480nm laser is very complicated, requiring at least 5 pairs of fiber Bragg gratings, and the gratings need to be matched precisely; and in order to achieve high Raman conversion efficiency, the wavelength of the pump laser needs to be matched precisely, which is difficult to implement and the overall cost high
The quantum deficit can be reduced and the output power of the erbium-doped fiber laser can be increased by means of in-band pumping, but the generation of pump light is based on a complex multi-order Raman process, and the overall structure is complex

Method used

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  • Erbium-doped fiber laser of random Raman fiber laser in-band pumping
  • Erbium-doped fiber laser of random Raman fiber laser in-band pumping
  • Erbium-doped fiber laser of random Raman fiber laser in-band pumping

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Embodiment 1

[0031] Example 1, reference Figure 4, a random 1480-nm laser-pumped high-power 1.5-micron erbium-doped fiber laser amplifier. The 1.5-micron seed laser 5 is coupled into the erbium-doped fiber 4 through the wavelength division multiplexer 2 . The initial pump wavelength of the random laser is 1064 nm, and the 6th-order Stokes laser is generated by random Raman process, which are 1117, 1175, 1239, 1310, 1390, and 1480 nm, respectively. By optimizing the Raman fiber length and 1064 Nano-laser power, and ultimately the 1480-nm laser power accounts for the major part of the total output power. The 1480-nanometer laser generated by the random laser is coupled into the erbium-doped fiber 4 through the wavelength division multiplexer 2, and 8 is a pump laser filter, which can filter out the redundant unabsorbed random laser. The low-power 1.5-micron laser can be amplified into a high-power 1.5-micron laser output at the end of the pump laser filter 8 or connected to a fiber collim...

Embodiment 2

[0032] Example 2, reference Figure 5 , a random 1510-nm laser-pumped high-power 1.56-micron erbium-doped fiber resonator. The initial pump wavelength of the random laser is 1080 nm, and the 6th-order Stokes laser is generated by the random Raman process, which are 1133, 1195, 1262, 1337, 1419, and 1510 nm, respectively. By optimizing the Raman fiber length and the 1080 nm laser power, the final 1510 nm laser power accounts for the major part of the total output power. The 1510 nm laser generated by random laser is coupled into the erbium-doped fiber 4 through the wavelength division multiplexer 2. 6 and 7 are 1560 nm high reflectivity fiber Bragg grating and low reflectivity fiber Bragg grating respectively, 8 is the pump laser filter , which can filter out unwanted unabsorbed random laser light. The high-power 1.56-micron laser can be output at the end of the pump laser filter 8 or connected to a fiber collimator.

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Abstract

The invention provides an erbium-doped fiber laser of a random Raman fiber laser in-band pumping. The erbium-doped fiber laser sequentially comprises a random laser pumping module, a pumping coupler and an erbium-doped fiber laser. According to the invention, a random fiber laser is used as a pumping source of the erbium-doped fiber laser; pumping light is coupled into the erbium-doped fiber laserthrough the pumping coupler, so that high-power laser output of the laser is realized; the advantages of high efficiency, stability and the like of a traditional erbium-doped fiber laser are maintained; the structure of the in-band pumping erbium-doped fiber laser of the traditional Raman fiber laser is simplified; the problem of erbium-doped fiber thermal management is effectively solved; and the in-band pumping erbium-doped fiber laser has a great development prospect and a high practical value.

Description

technical field [0001] The invention relates to a fiber laser, in particular to an erbium-doped fiber laser pumped with a random Raman fiber laser. Background technique [0002] The typical emission wavelength of erbium-doped fiber laser is 1.5-1.6 microns, which belongs to the laser in the human eye-safe band. The laser in this band is not only attractive in the field of scientific research, but also in the fields of laser communication, laser speed measurement, lidar and national defense. Broad application prospects. The 780 nm laser obtained by frequency doubling the 1560 nm laser can cool rubidium atoms {see Debs, C.C.N.Kuhn, G.D.McDonald, P.A.Altin, J.D.Close, and N.P.Robins, "11 W narrowlinewidth laser source at 780nm for laser cooling and manipulation of Rubidium," Opt.Express 20, 8915-8919 (2012)}. Therefore, lasers in the 1.5-micron wavelength band are also widely used in cold atom physics, quantum optics, etc. [0003] According to whether the pump laser is tran...

Claims

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Application Information

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IPC IPC(8): H01S3/094H01S3/067H01S3/16
CPCH01S3/067H01S3/094003H01S3/1608H01S3/06716H01S3/094046
Inventor 张磊姜华卫付小虎赵儒臣
Owner SHANGHAI PRECILASERS TECH CO LTD
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