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Method and device for generating ultrashort pulses with high pulse repetition frequency on basis of graphene microcavity mode locking

An ultra-short pulse and generating device technology, applied in laser parts, electrical components, lasers, etc., can solve the problems of wide pulse width, poor system stability, low pulse repetition frequency, etc., to reduce the cavity length and increase the longitudinal mode. Interval, effect of suppressing spontaneous emission noise

Inactive Publication Date: 2017-05-31
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0009] In order to solve the disadvantages of low pulse repetition frequency, wide pulse width and poor system stability of conventional fiber lasers, the present invention provides a high repetition frequency ultrashort pulse generation method and device based on graphene microcavity mode-locking

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  • Method and device for generating ultrashort pulses with high pulse repetition frequency on basis of graphene microcavity mode locking
  • Method and device for generating ultrashort pulses with high pulse repetition frequency on basis of graphene microcavity mode locking

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Embodiment Construction

[0023] The high repetition rate ultrashort pulse generation method based on graphene microcavity mode-locking of the present invention is to use a 980nm monochromatic laser source as a pumping light source, and pump an erbium-doped optical fiber through a wavelength division multiplexer of 980 / 1550 nm Pump pumping, and then suppress the backward feedback through the polarization-independent isolator, and then use the characteristics of graphene microcavity high nonlinearity, narrow linewidth, large free spectral range, large modulation depth, and small non-saturable absorption loss, through The two mode-locking mechanisms of filtered four-wave mixing and saturable absorption effect work together to realize the mode-locked pulse output through the coupler. The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] A high repetition rate ultrashort pulse generator based on graphene microcavity mode-locking, comprising ...

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Abstract

The invention discloses a method and a device for generating ultrashort pulses with high pulse repetition frequency on the basis of graphene microcavity mode locking. A graphene microcavity with high nonlinearity, narrow linewidth, larger free spectral range, larger modulation depth and small non-saturable absorption loss is adopted, the repetition frequency of the pulses is increased with a four-wave mixing effect of filtering, the stability of mode-locked pulses is improved through combination with a saturable absorber for inhibiting spontaneous radiation noise and narrowing pulse width, and pulse signals with hundreds of GHz of repetition frequency, hundreds of fs of pulse width and low jitter are generated. Implementation of laser promotes development of optic fiber laser with high pulse repetition frequency and low pulse width.

Description

technical field [0001] The invention relates to the field of high-repetition-frequency ultrashort pulse signals, specifically a method and device for generating high-repetition-frequency ultrashort pulses based on graphene microcavity mode-locking, which can be used in optical communications, national defense security, astronomy, and high-speed all-optical modulus Transformation, biomedicine, micromachining and other fields. Background technique [0002] Compared with analog systems, digital systems have great advantages in terms of stability, anti-interference ability, processing accuracy, and integration. However, most of the information in nature exists in the form of analog signals, and the analog signals must be converted into digital signals. Optical fiber communication has been widely used all over the world due to its huge transmission capacity, good anti-interference ability, high speed and low bit error rate, and new transmission technologies such as 40G, OTN and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/098
CPCH01S3/1115
Inventor 刘香莲王云才李璞郭龑强郭晓敏韩韬
Owner TAIYUAN UNIV OF TECH
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