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A Pulsed Fully Polarization-Maintaining Fiber Laser Based on Multiple Nonlinear Amplifying Loop Mirrors

A polarization-maintaining fiber, non-linear technology, applied in the field of pulsed full polarization-maintaining fiber lasers, can solve the problems of limited application, unstable mode-locking state, and high mode-locking threshold, reducing the self-starting threshold, facilitating mode-locking self-starting, Strong anti-interference ability

Active Publication Date: 2016-08-24
重庆渝研激光科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But they all have some defects: the mode-locking threshold of polarization rotation mode-locking is high, the fiber is not polarization-maintaining, and the mode-locked state is susceptible to external interference. Temperature changes and mechanical vibrations will cause the mode-locked state to be unstable or even lost. The modulation of stability and pulse sequence is large, and it is not easy to start mode locking automatically; the saturable absorption mode locking can be self-starting, but the pulse is easy to split and high noise, and the peak power of the pulse laser is high, while the loss threshold of the saturable absorber is low. Not suitable for high power and long time mode-locked state
But at the same time, there are unavoidable deficiencies: since there is only one magnifying loop mirror, the pulse is wide and not smooth; at the same time, a single nonlinear magnifying loop mirror inevitably has a certain amplitude noise, etc.
These shortcomings limit the application of this method

Method used

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  • A Pulsed Fully Polarization-Maintaining Fiber Laser Based on Multiple Nonlinear Amplifying Loop Mirrors
  • A Pulsed Fully Polarization-Maintaining Fiber Laser Based on Multiple Nonlinear Amplifying Loop Mirrors
  • A Pulsed Fully Polarization-Maintaining Fiber Laser Based on Multiple Nonlinear Amplifying Loop Mirrors

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Embodiment 1

[0034] see figure 2 , this embodiment is a new type of laser based on two identical nonlinear amplifying annular mirror cavities, which includes a main oscillation cavity 000 and two identical nonlinear amplifying annular mirror cavities 100 and 200 . The main oscillator cavity includes a fiber splitter 001 , a fiber filter 002 , a semiconductor laser 003 , a pump combiner 004 , a ytterbium-doped gain fiber 005 , and two fiber isolators 006 and 007 . The splitting ratio of fiber beam splitter 001 is preferably 8:2, the working wavelength of fiber filter 002 is preferably 1064 nm, the wavelength bandwidth is preferably ±1 nm, the working wavelength of semiconductor laser 003 is preferably 976 nm, and the length of ytterbium-doped gain fiber 005 is preferably 2 m. The nonlinear amplifier ring cavity includes semiconductor lasers 101 and 201 , pump combiners 102 and 202 , ytterbium-doped gain fibers 103 and 203 , high nonlinear phase fibers 104 and 204 , and 2×2 beam splitters 1...

Embodiment 2

[0037] see image 3 , this embodiment is a new type of laser based on two different nonlinear amplifying annular mirror cavities, which includes a main oscillation cavity 000 and two different nonlinear amplifying annular mirror cavities 100 and 200 . The main oscillator cavity includes a fiber splitter 001 , a fiber filter 002 , a semiconductor laser 003 , a pump combiner 004 , a ytterbium-doped gain fiber 005 , and two fiber isolators 006 and 007 . The splitting ratio of fiber beam splitter 001 is preferably 8:2, the working wavelength of fiber filter 002 is preferably 1064 nm, the wavelength bandwidth is preferably ±1 nm, the working wavelength of semiconductor laser 003 is preferably 976 nm, and the length of ytterbium-doped gain fiber 005 is preferably 2 m. The nonlinear amplification ring cavity includes semiconductor lasers 101 and 201 , pump combiners 102 and 202 , ytterbium-doped gain fibers 103 and 203 , high nonlinear phase fibers 104 and 204 , and 2×2 beam splitter...

Embodiment 3

[0040] see Figure 4 , this embodiment is a new type of laser based on three identical nonlinear amplifying annular mirror cavities, which includes a main oscillator cavity 000, three identical nonlinear amplifying annular mirror cavities 100, 200, 300; the main oscillator cavity includes fiber beam splitting 001, fiber filter 002, semiconductor laser 003, pump combiner 004, ytterbium-doped gain fiber 005, three fiber isolators 006, 007, 008. The splitting ratio of fiber beam splitter 001 is preferably 8:2, the working wavelength of fiber filter 002 is preferably 1064 nm, the wavelength bandwidth is preferably ±1 nm, the working wavelength of semiconductor laser 003 is preferably 976 nm, and the length of ytterbium-doped gain fiber 005 is preferably 2 m. The nonlinear amplifier ring cavity includes semiconductor lasers 101, 201, 301, pump combiners 102, 202, 302, ytterbium-doped gain fibers 103, 203, 303, high nonlinear phase fibers 104, 204, 304, 2×2 Beamsplitters 105, 205, ...

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Abstract

The invention discloses a pulse all polarization-maintaining optical fiber laser based on multiple non-linear amplification loop mirrors. The pulse all polarization-maintaining optical fiber laser comprises a main oscillating cavity, a non-linear amplification loop mirror in preceding stage and one or more non-linear amplification loop mirrors in backward stage, an optical field in the laser is clockwise spread and sequentially passes through the main oscillating cavity, the non-linear amplification loop mirror in preceding stage, one or more non-linear amplification loop mirrors in backward stage and the main oscillating cavity to form a closed-loop cavity; and the low beam-splitting end of a beam splitter in the main oscillating cavity is used as the output end of the laser. The main oscillating cavity provides main gain, stabilizes pulse and controls the direction of an optical path; the non-linear amplification loop mirrors in preceding stage and backward stage are used for realizing self-starting of the locked mode; multiple loop mirrors can effectively inhibit amplitude noise, stabilize mode locking and weaken the pulse splitting, are easy for mode locking, and can reduce the mode locking threshold value, eliminate minor pulses in front of and behind the pulses and narrow the pulse; and the optical fiber model, the length and the pumping light power of each loop mirror are regulated to realize the polarization-maintaining laser output with different parameters such as repetition frequency, pulse width, power and the like.

Description

technical field [0001] The invention belongs to the field of ultrafast optics and laser technology, and relates to a pulsed full polarization-maintaining fiber laser based on the action of multiple nonlinear amplifying annular mirror cavities. Background technique [0002] Fiber lasers are the third generation of new lasers after traditional gas lasers and solid-state lasers. They have the advantages of compact structure, long life, maintenance-free, good beam quality, energy saving and environmental protection. Among them, pulsed fiber lasers have narrow pulses, high peak power, No need for water cooling and other outstanding advantages, it is one of the frontier directions in the field of optoelectronic information today. [0003] Pulsed fiber lasers have the characteristics of good gain characteristics, short action time, good output beam quality, small size, flexible use, and easy connection with optical fiber communication systems. widely used. At present, the commonl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/08H01S3/098H01S3/11H01S3/13
Inventor 王超曾和平
Owner 重庆渝研激光科技有限公司
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