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An all-fiber ring passively mode-locked laser

A passive mode-locking and laser technology, which is applied in the field of lasers, can solve the problems of unstable output spectrum and low energy, and achieve the effects of stable spectral shape, less spectral change and stable spectrum

Active Publication Date: 2019-10-22
WUHAN YANGTZE SOTON LASER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at at least one defect or improvement requirement of the prior art, the present invention provides an all-fiber annular passive mode-locked laser, the purpose of which is to solve the problems of unstable output spectrum and low energy of the existing mode-locked lasers

Method used

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  • An all-fiber ring passively mode-locked laser
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  • An all-fiber ring passively mode-locked laser

Examples

Experimental program
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Effect test

Embodiment 1

[0032] figure 1 It is a schematic structural view of the all-fiber ring mode-locked laser provided in Embodiment 1, as figure 1 As shown, the all-fiber ring mode-locked laser provided by this embodiment includes a fiber grating 1, a transmission saturable absorber 2, a wavelength division multiplexer 3, a rare earth-doped fiber 4, a fiber output coupler 5 and a pumping source 6;

[0033] Wherein, the output end of the pumping source 6 is connected with the first end of the wavelength division multiplexer 3, the second end of the wavelength division multiplexer 3 is connected with the first end of the rare earth-doped optical fiber 4, and the second end of the rare earth-doped optical fiber 4 end is connected to the first end of the fiber output coupler 5, the second end of the fiber output coupler 5 is connected to the first end of the fiber grating 1, and the second end of the fiber grating 1 is connected to the first end of the transmissive saturable absorber 2. The second...

Embodiment 2

[0038] The all-fiber ring mode-locked laser provided in this embodiment includes a fiber chirped Bragg grating 7, a transmissive saturable absorber 2, a wavelength division multiplexer 3, a rare earth-doped fiber 4, a fiber output coupler 5 and a pump source 6;

[0039] The connection relationship of each device is specifically: the output end of the pump source 6 is connected to the first end of the wavelength division multiplexer 3, the second end of the wavelength division multiplexer 3 is connected to the first end of the rare earth-doped optical fiber 4, and the doped The second end of the rare earth fiber 4 is connected to the first end of the fiber output coupler 5, the second end of the fiber output coupler 5 is connected to the first end of the fiber chirped Bragg grating 7, and the second end of the fiber chirp Bragg grating 7 The end is connected with the first end of the transmissive saturable absorber 2, and the second end of the transmissive saturable absorber 2 ...

Embodiment 3

[0042] In the all-fiber ring mode-locked laser provided in this embodiment, on the basis of Embodiment 1 or Embodiment 2, a dispersion compensator 8 is provided at any position in the ring resonator, and the dispersion compensator 8 has a dispersion compensation function. It is used to compensate the dispersion of other devices in the resonator and single-mode fiber, so that the resonator can generate shorter mode-locked pulses; or it can be used to control the overall residual dispersion of the resonator, so that the resonator can work in the desired working range ( For example, in the soliton working area, the total dispersion is negative, and in the self-similar or all-normal-dispersion working area, the total dispersion is positive), generating pulses of a specific shape; the dispersion compensator 8 can choose an optical fiber with special dispersion;

[0043] Figure 4 is a schematic structural view of the all-fiber ring mode-locked laser provided in this embodiment, as ...

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Abstract

The invention belongs to the technical field of lasers, and discloses an all-fiber ring passive mode-locked laser, which comprises a fiber grating, a transmissive saturable absorber, a wavelength division multiplexer, a rare earth doped fiber, an optical fiber output coupler and a pump source; the fiber grating, the transmissive saturable absorber, the wavelength division multiplexer, the rare earth doped fiber and the optical fiber output coupler are connected by a single mode fiber to form a ring resonant cavity, and the relative position among the fiber grating, the transmissive saturable absorber, the wavelength division multiplexer, the rare earth doped fiber and the optical fiber output coupler is adjustable; the output end of the pump source is connected to the wavelength division multiplexer, and one end of the optical fiber output coupler is used as a pulse laser output end; and the first end and the second end of the fiber grating respectively serve as two ends of the ring resonant cavity, and the light pulse is reflected twice by the fiber grating in a single round trip in the resonant cavity. The ring resonant cavity provided by the invention has a simple structure andcan obtain mode-locked pulses with more stable spectral shape and higher pulse energy.

Description

technical field [0001] The invention belongs to the technical field of lasers, and more specifically relates to an all-fiber ring passive mode-locked laser. Background technique [0002] In the laser field, ultrashort (picosecond or femtosecond) optical pulses are generally generated by mode-locked lasers. Mode-locked lasers are divided into two types: active mode-locked and passive mode-locked; among them, modulators are required in active mode-locked lasers. Increased system complexity and cost; passive mode-locked lasers can output ultrashort pulses without inserting any modulator in the cavity, with simple structure, low cost, and easy compatibility with optical fibers. [0003] All-fiber mode-locked lasers usually use saturable absorbers to achieve passive mode-locking; common all-fiber mode-locked laser resonator structures include Fabry-Perot (F-P) structure, ring structure, and 8-shaped and 9-shaped structures; Existing mode-locked lasers have the following disadvan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/11H01S3/0941H01S3/08
Inventor 何飞陈抗抗
Owner WUHAN YANGTZE SOTON LASER CO LTD