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A spectrally tailored long-ring nonlinear mirror and its application

A non-linear, reflective mirror technology, applied in the laser field, can solve the problems affecting the signal-to-noise ratio of laser pulses, long pulse interval time, pulse frequency domain distortion, etc., to reduce the mode-locking threshold and repetition frequency, and suppress arc sub-bands and the effect of spontaneous radiation

Active Publication Date: 2022-01-04
GUANGDONG ROI OPTOELECTRONICS TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the frequency domain, the negative dispersion characteristics introduced by the longer fiber will lead to the generation of soliton sidebands, resulting in the distortion of the pulse in the frequency domain, further affecting its time-frequency domain characteristics
[0006] In addition, in a laser with a low repetition rate, the interval between pulses is long, and the lifetime of excited atoms in the upper energy level (10-100ns) in the gain fiber is much shorter than the period of the pulse (in the order of μs), which will lead to The atoms in the excited state are not stimulated to radiate in time, but spontaneously transition to a low energy level, causing serious spontaneous emission effects
Spontaneous emission will not only affect the signal-to-noise ratio of the laser pulse, but also the spontaneous emission noise will be easily amplified in the subsequent amplification, aggravating the noise

Method used

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  • A spectrally tailored long-ring nonlinear mirror and its application
  • A spectrally tailored long-ring nonlinear mirror and its application
  • A spectrally tailored long-ring nonlinear mirror and its application

Examples

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Embodiment 1

[0027] Such as figure 1 As shown, a long-loop nonlinear reflector of spectrum clipping provided by the present invention includes a nonlinear long loop 15, a spectrum clipper 13 and a first coupler 16, and the first coupler 16 is connected to the nonlinear long loop Ring 15 is connected, and the nonlinear long ring 15 is connected with the spectrum clipper 13, and the spectrum clipper 13 is connected with the first coupler 16, and the first coupler 16 divides the incident light into counterclockwise and two beams of light clockwise, and two beams of light counterclockwise and clockwise respectively pass through the nonlinear long ring 15, the spectrum clipper 13 to the first coupler 16 to be emitted, compared with the traditional reflector, the present invention The nonlinear long loop 15 can effectively reduce the mode-locking threshold and repetition rate of the light beam, and the spectrum clipper 13 of the present invention can effectively suppress the generation of sub-ar...

Embodiment 2

[0031] Such as figure 2 As shown, a nonlinear adjuster based on a long-loop nonlinear mirror of spectrum clipping provided by the present invention includes a nonlinear long loop 15, a spectrum clipper 13, a first coupler 16 and a second coupler 17, so The first coupler 16 is connected to the nonlinear long loop 15, the nonlinear long loop 15 is connected to the spectrum clipper 13, the spectrum clipper 13 is connected to the first coupler 16, and the The second coupler 17 is connected to the first coupler 16. Similarly, the first coupler 16 of the nonlinear regulator divides the incident light into two beams of counterclockwise and clockwise beams, and the two beams of light pass through in different orders. Interference occurs at the first coupler 16 after the nonlinear long loop 15 and the spectrum clipper 13, and the light beam after the interference is emitted through the second coupler 17, and the nonlinear regulator of the present invention passes through the nonlinear...

Embodiment 3

[0036] Such as image 3 As shown, an ultrashort pulse laser oscillator based on a long-ring nonlinear reflector of spectrum clipping provided by the present invention includes a nonlinear long-ring 15, a spectrum clipper 13, a phase shifter 14, a first coupler 16, Second coupler 17, optical fiber mirror 18, gain fiber 12, wavelength division multiplexer 11 and pump source 10, one end of said wavelength division multiplexer 11 is respectively connected with said pump source 10, said frequency spectrum The clipper 13 is connected, the other end of the wavelength division multiplexer 11 is connected with the gain fiber 12, the spectrum clipper 13 is connected with the phase shifter 14, and the phase shifter 14 is connected with the nonlinear The long loop 15 is connected, the nonlinear long loop 15 is connected with the first coupler 16, the first coupler 16 is connected with the second coupler 17, and the second coupler 17 is connected with the optical fiber A mirror 18 is atta...

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Abstract

The present invention relates to the field of laser technology, in particular to a spectrally clipped long-ring nonlinear reflector, which includes a nonlinear long-ring, a spectrum clipper and a first coupler, and the first coupler splits the incident light into counterclockwise and two beams of light clockwise, the two beams of counterclockwise and clockwise light respectively pass through the nonlinear long ring, the spectrum clipper to the first coupler to emit, compared with the traditional reflector, the present invention can pass through the incident The control of optical frequency and phase makes the light emitted by the first coupler of the present invention satisfy high-precision and high-sensitivity optical spectrum shaping, spectral modulation, nonlinear spectral modulation, spectral filtering, ultrafast pulse modulation, etc.; in addition, the present invention The nonlinear long loop can effectively reduce the mode-locking threshold and repetition rate of the light beam, and the spectrum clipper of the present invention can effectively suppress the generation of sub-arc sidebands and spontaneous radiation, ensuring that the output pulse spectrum of the long-loop nonlinear mirror is clean, Effectively reduce the noise generated by spontaneous radiation.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a spectrum-cut long-ring nonlinear reflector and its application. Background technique [0002] The nonlinear loop mirror based on Sagnac interference effect is a common nonlinear modulation device, which is widely used in the fields of optical switch, spectrum shaping, pulse shaping and ultrashort pulse modulation. Based on the nonlinear effect in the optical fiber, the nonlinear modulation of the laser depends heavily on the incident light power. The higher the laser power, the more obvious the nonlinear modulation of the incident laser. On the contrary, the low-power incident laser incident nonlinear loop mirror is basically not affected. [0003] In addition, in terms of ultrashort pulse generation based on nonlinear loop mirrors. In order to obtain a picosecond pulse oscillator with low repetition rate and low mode-locking threshold. Its cavity structure requires special ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/35H01S3/10
CPCH01S3/10023H01S3/10053G02F1/3519
Inventor 曾和平郭政儒
Owner GUANGDONG ROI OPTOELECTRONICS TECH CO LTD