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Fiber laser with multi-wavelength equal-interval pump light sources

A fiber laser and pump laser technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of temperature rise, limited cooling capacity of refrigerators, and reduced cooling efficiency, and achieve cost reduction and stable output power. The effect of improving performance and overall work stability, and saving power consumption

Active Publication Date: 2014-12-31
DANYANG JUCHEN OPTOELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the disadvantages of this method are: 1. Additional semiconductor refrigerator unit and refrigerator control circuit are required; 2. The refrigeration capacity of this refrigerator is limited, which limits the number and power consumption of the total pump lasers; 3. The cooler itself will emit more heat while cooling, and the heat needs to be dissipated to the outside of the fiber laser casing in time, and the part that has not been dissipated will flow back into the laser, which will cause a greater temperature rise instead; 4. When the working temperature is high, the cooling efficiency of this type of refrigerator will be significantly reduced, and even failure will occur.

Method used

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  • Fiber laser with multi-wavelength equal-interval pump light sources
  • Fiber laser with multi-wavelength equal-interval pump light sources
  • Fiber laser with multi-wavelength equal-interval pump light sources

Examples

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Embodiment 1

[0023] Such as figure 1 As shown, a fiber laser using a multi-wavelength equally spaced pump light source, that is, a high-power optical resonant cavity is formed by a fiber grating and an active fiber to realize high-power fiber lasing. It consists of optical power absorber 101, fiber grating 102, forward fiber pumped laser beam combiner (N+1 x 1 type) 103, double-clad active fiber and passive fiber fusion splice 104, and semiconductor pump laser 105 , Reverse fiber pumped laser beam combiner (N+1 x 1 type) 106, double-clad Yb+ doped active fiber 107, fiber output end cap 108, 110 acousto-optic modulator (optional, only for pulse Fiber laser; continuous working fiber laser is not required) and the main laser laser output terminal 120, forward fiber pump laser beam combiner (N+1 x 1 type) 103 and reverse fiber pump laser beam combiner (N +1 x 1 type) 106 The pump laser of the semiconductor pump laser 105 is transported to the inner cladding of the double-clad Yb+ doped active f...

Embodiment 2

[0025] Such as figure 2 As shown, the multi-wavelength pumped temperature-insensitive fiber amplifier, that is, a power amplifying unit is formed by an active fiber, and amplifies the optical power output by the previous stage into a higher output optical power. Forward fiber pumped laser beam combiner (N+1 x 1 type) 103, double-clad active fiber and passive fiber fusion splice 104, diode pumped laser 105, reverse fiber pumped laser beam combiner (N+1 x 1 type) 106, double-clad Yb+ doped active fiber 107, fiber output end cap 108, post-stage fiber amplifier 109, seed laser light source 110 and main laser laser output end 120, forward fiber pump The pump laser beam combiner (N+1 x 1 type) 103 and the reverse fiber pump laser beam combiner (N+1 x 1 type) 106 pass the lower power pump laser of the diode pump laser 105 through the double package The fusion splice 104 of the active fiber and the passive fiber is transported to the inner cladding of the double-clad Yb+ doped active ...

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Abstract

A fiber laser with multi-wavelength equal-interval pump light sources is characterized in that the fiber laser adopts equal-interval multi-wavelength pump lasers as pump light sources. The wavelength of each pump laser source is about 976nm. The traditional means that an external refrigerator is used to refrigerate all 976nm pump lasers is completely abandoned. Certain wavelengths are pertinently distributed on one side of 976nm low wavelength, the external refrigerator is not needed, and temperature insensitivity of a doped active optical fiber is achieved within a certain operation temperature change scope. Therefore, the output power stability and the whole operation stability of the fiber lasers are improved.

Description

Technical field [0001] The present invention relates to a low-temperature sensitive fiber laser and fiber amplifier using a multi-wavelength pump laser source, in particular to a multi-wavelength laser pump light source structure fiber laser near 976nm with approximately equidistant wavelength distribution. Background technique [0002] We know that fiber lasers have developed rapidly in recent years. Its types include fiber pulse laser, fiber high power continuous laser and fiber high power quasi continuous laser. These fiber lasers have various pump structures, such as forward pumping, backward pumping, bidirectional pumping and distributed multipoint pumping. The pump light source is usually a semiconductor single-tube light source or a semiconductor multi-tube module. The pump wavelengths are widely used in the three wavelength ranges of 915nm, 940nm, and 976nm. [0003] In high-power fiber lasers, especially in 976nm pumped fiber lasers, when the operating temperature chang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/0941
Inventor 周胜李丰谈根林
Owner DANYANG JUCHEN OPTOELECTRONICS TECH