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Signal mode optical fiber laser

A single-mode fiber and laser technology, which is applied in the field of single-mode fiber lasers, can solve the problems of complex grating processing technology, difficult grating reflection wavelength, fixed grating wavelength, etc., and achieve the effect of simple process, high coupling efficiency and simple operation

Inactive Publication Date: 2014-02-05
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing technology of the grating is complicated and the cost is high, and the reflection wavelengths of the gratings at both ends should be consistent in principle
Generally, the wavelength of commercial gratings is relatively fixed, and it is difficult to write the reflection wavelength of the grating at will.

Method used

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  • Signal mode optical fiber laser
  • Signal mode optical fiber laser
  • Signal mode optical fiber laser

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0031] Specific embodiment 1, please refer to figure 1 , figure 1 It is a schematic diagram of the optical path of Embodiment 1 of the single-mode fiber laser of the present invention, including a 976nm semiconductor laser pump source 101, a R>99%1064nm single-mode fiber high reflection mirror 102, a melting point 103, and a beam combiner of (2+1)×1 104. Active multimode fiber 105, R99%976nm single-mode fiber low reflection mirror 106 and output laser 107, along the optical propagation direction of the fiber laser system, 976nmLD pump source 101 is fused To the pump input fiber end of the beam combiner 104 of (2+1)×1, R>99% 1064nm single-clad single-mode fiber high reflection mirror 102 is fused to the signal input fiber end of the beam combiner 104, the beam combiner The output end of the double-clad 10 / 125 single-mode pigtail of 104 is fused with a 60 / 125 active multimode optical fiber 105 with a length of 12.25 cm. %976nm single-clad single-mode fiber low-reflection mirro...

Embodiment 2

[0042] The difference between embodiment 2 and embodiment 1 is that embodiment 2 adopts a circular mirror made of an optical fiber output coupler to replace the single-clad single-mode fiber high-low reflector in specific embodiment 1.

[0043] Please refer to Figure 5 , Figure 5 It is a schematic diagram of the optical path of Embodiment 2 of the single-mode fiber laser of the present invention, including a 976nm semiconductor (LD) pump source 201, a ring mirror 202 made of a 1:1 fiber output coupler, a melting point 203, and a (2+1)×1 The ring mirror 206 and the output laser 207 made of beam combiner 204, active multimode fiber 205, 1:9 fiber output coupler, along the light propagation direction of the fiber laser system, 976nmLD pump source 201 is fused to ( The pump input fiber end of the beam combiner 204 of 2+1)×1, the ring mirror 202 made of the 1:1 fiber output coupler is fused to the signal input fiber end of the beam combiner 204, and the double package of the bea...

Embodiment 3

[0044] The difference between Embodiment 3 and Embodiment 2 is that in Embodiment 3, the loop mirror made of a 2:8 fiber output coupler is used instead of the loop mirror made of a 1:9 fiber output coupler in Embodiment 2.

[0045] Please refer to Figure 6 , Figure 6 It is a schematic diagram of the optical path of Embodiment 3 of the single-mode fiber laser of the present invention, including a 976nm semiconductor (LD) pump source 301, a ring mirror 302 made of a 1:1 fiber output coupler, a melting point 303, and a (2+1)×1 The ring mirror 306 and the output laser 307 made of beam combiner 304, active multimode fiber 305, 2:8 fiber output coupler, along the light propagation direction of the fiber laser system, 976nmLD pump source 301 is fused to ( The pump input fiber end of the beam combiner 304 of 2+1)×1, the ring mirror 302 made of the 1:1 fiber output coupler is fused to the signal input fiber end of the beam combiner 304, and the double package of the beam combiner 30...

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Abstract

A signal mode optical fiber laser comprises a pumping source, a beam combiner, active multi-mode optical fibers, a single cladding single mode optical fiber high reflecting mirror and a single cladding single mode optical fiber low reflecting mirror. Signal optical fibers of the beam combiner, and signal mode optical fibers of the single cladding single mode optical fiber high reflecting mirror and single mode optical fibers of the single cladding single mode optical fiber low reflecting mirror are same in fiber core diameter. Signal input optical fibers of the beam combiner are connected with the single cladding single mode optical fiber high reflecting mirror in a fusion mode, pumping input optical fibers of the beam combiner are connected with the pumping source in a fusion mode, output optical fibers of the beam combiner are connected with one ends of the active multi-mode optical fibers in a fusion mode, and the other ends of the active multi-mode optical fibers are connected with the single cladding single mode optical fiber low reflecting mirror in a fusion mode. The signal mode optical fiber laser has the advantages of being low in cost, flexible in wave length, simple in structure and high in power.

Description

technical field [0001] The invention relates to a fiber laser, in particular to a single-mode fiber laser. Background technique [0002] A single-mode fiber laser generally consists of three parts: pump light, gain fiber and grating (as a resonator). The gain fiber is generally a single-mode gain fiber or an approximate single-mode gain fiber with a wide gain bandwidth. In 2010, Richardson pointed out in the invited report "High power fiber lasers: current status and future perspectives[Invited]" that in order to obtain laser output at low pump power, it is generally necessary to use a longer active single-mode fiber. In addition, the core cross-sectional area of ​​the active single-mode fiber is very small, and it is easy to generate a large optical power density to cause nonlinear effects, cause irreversible optical damage or undesired optical phenomena, and it is difficult to obtain high power output. The grating has the characteristics of a narrow reflection spectrum w...

Claims

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Application Information

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IPC IPC(8): H01S3/067G02B6/255
Inventor 陈玲霞冯衍张磊
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI