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Mamyshev type laser oscillator with nonlinear loop filter

A technology of laser oscillator and loop filtering, which is applied in the direction of lasers, laser parts, phonon exciters, etc., can solve the problems of difficult ultrashort pulse laser sequence, difficult to realize self-starting, poor self-starting performance of lasers, etc.

Active Publication Date: 2020-02-07
GUANGDONG ROI OPTOELECTRONICS TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing Mamyshev-type laser oscillators are usually difficult to achieve self-starting, which requires additional seed pulses or external electrical modulation pulses during start-up
In order to make the Mamyshev laser oscillator self-starting, it is necessary to introduce a saturable absorption mechanism in the Mamyshev laser oscillator to assist in the generation of ultrashort pulse sequences. At present, nonlinear optical loop mirrors are usually used in all-fiber laser oscillators to generate ultrashort Pulse, for example, patent document CN 103311780 A discloses a kind of laser with nonlinear optical loop mirror (the laser has a laser resonator, which is equivalent to a laser oscillator), the laser realizes self-starting by adopting nonlinear optical loop mirror, but , it is difficult for the laser to generate a stable ultrashort pulse laser sequence through a single nonlinear optical loop mirror, which makes the self-starting performance of the laser poor and low

Method used

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  • Mamyshev type laser oscillator with nonlinear loop filter
  • Mamyshev type laser oscillator with nonlinear loop filter
  • Mamyshev type laser oscillator with nonlinear loop filter

Examples

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Embodiment 1

[0026] The Mamyshev type laser oscillator of the nonlinear loop filter of the present embodiment is as figure 1 As shown, it includes a first nonlinear optical loop mirror 100 , a second nonlinear optical loop mirror 200 and a stretch amplifier 300 with a ring bilateral amplification structure.

[0027] The first nonlinear optical loop mirror 100 includes a first wavelength division multiplexer 101, a first gain fiber 102, a first filter 103, a first phase shifter 104, a first coupler 105 and a first pump source 106, Wherein the first pump source 106, the first wavelength division multiplexer 101 and the first gain fiber 102 form the first optical amplifier; the second nonlinear optical loop mirror 200 includes the second wavelength division multiplexer 201, the second gain fiber 202, the second filter 203, the second phase shifter 204, the second coupler 205 and the second pumping source 206, wherein the second pumping source 206, the first wavelength division multiplexer 201...

Embodiment 2

[0038] The Mamyshev type laser oscillator of the nonlinear loop filter of the present embodiment is as figure 2 As shown, the stretching amplifier 300 comprising a first nonlinear optical loop mirror 100, a second nonlinear optical loop mirror 200 and a linear bidirectional amplification structure, wherein the first nonlinear optical loop mirror 100, the second nonlinear optical loop mirror 200 and The first nonlinear optical loop mirror 100 and the second nonlinear optical loop mirror 200 in Embodiment 1 have the same structure, the difference is that the first phase shifter 104 and the second phase shifter 204 of this embodiment provide -π / 2, so as to ensure that the nonlinear optical loop mirrors 100 and 200 are reflective outputs, so that the pulsed laser output from one of the nonlinear optical loop mirrors can be output to another nonlinear optical loop mirror through the stretching amplifier 300; the coupler 105 The output terminals of , 205 are used to output high-en...

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Abstract

The present invention provides a Mamyshev type laser oscillator with nonlinear loop filtering. The Mamyshev type laser oscillator comprises a first nonlinear optical loop lens comprising a first coupler, a first optical amplifier, a first filter and a first phase shifter, a second nonlinear optical loop lens comprising a second coupler, a second optical amplifier, a second filter and a second phase shifter, and a broadening amplifier comprising a third optical amplifier and a fourth optical amplifier, wherein the central wavelength of the second filter is different from that of the first filter, an input end of the third optical amplifier is connected to an output port of the first nonlinear optical loop lens, an output end of the third optical amplifier is connected to an input port of the second nonlinear optical loop lens, an input end of the fourth optical amplifier is connected to an output port of the second nonlinear optical loop lens, and an output end of the fourth optical amplifier is connected to an input port of the first nonlinear optical loop lens. Pulse laser is continuously amplified, broadened, narrowed, and reshaped in the Mamyshev type laser oscillator until a stable pulse sequence is formed, and so the self-starting performance of the Mamyshev type laser oscillator is good.

Description

technical field [0001] The invention relates to the field of laser oscillators, in particular to a Mamyshev type laser oscillator with nonlinear loop filtering. Background technique [0002] Compared with traditional solid-state lasers, ultrafast fiber lasers have the advantages of high energy conversion efficiency, easy construction, convenient integration, beam quality close to the diffraction limit, low cost, and convenient maintenance. Laser oscillators are used to generate ultra-short pulse laser sources on the order of picoseconds or even femtoseconds, and are the core components of high-power fiber lasers. The Mamyshev-type laser oscillator based on pulse re-amplification and pulse reshaping can further increase the pulse energy of the fiber laser to the order of hundreds of nJ. Specifically, the Mamyshev-type laser oscillator relies on the spectral broadening effect caused by self-phase modulation in the fiber and The spectral selection effect of the filter element ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/11H01S3/108H01S3/10
CPCH01S3/06754H01S3/10053H01S3/108H01S3/11
Inventor 曾和平郭政儒
Owner GUANGDONG ROI OPTOELECTRONICS TECH CO LTD
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