Double-resonant-cavity coupled all-fiber Q-switched mode-locked pulse laser

A mode-locked pulse and dual-cavity technology, which is applied in the fields of laser technology, fiber optics and nonlinear optics, can solve the problem of insufficient single pulse energy of mode-locked lasers, insufficient narrow pulse width of Q-switched lasers, and poor anti-interference ability of the environment, etc. problems, to achieve the effect of easy industrial production and application, compact structure, and strong environmental interference ability

Inactive Publication Date: 2019-03-01
BEIJING UNIV OF TECH
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems existing in the prior art, such as complex optical path system, large loss, high cost, poor anti-environmental interference ability, insufficient narrow pulse width of Q-switched laser, and insufficient high single pulse energy of mode-locked laser, the present invention provides a dual-resonant The cavity-coupled all-fiber Q-switched mode-locked pulse laser uses doped ra

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Double-resonant-cavity coupled all-fiber Q-switched mode-locked pulse laser
  • Double-resonant-cavity coupled all-fiber Q-switched mode-locked pulse laser
  • Double-resonant-cavity coupled all-fiber Q-switched mode-locked pulse laser

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example one

[0037] Such as figure 1 As shown, a dual-cavity-coupled all-fiber Q-switched mode-locked pulse laser includes a pump device, a laser resonator, a gain fiber, a saturable absorption element, and a laser output device. The pump device includes a pump source 1, an optical fiber The beam combiner 2 and the wavelength division multiplexer 10; the laser resonator includes a first reflective fiber Bragg grating 5, a second reflective fiber Bragg grating 6, a semiconductor saturable absorption mirror (SESAM) 7, a third reflective fiber Bragg grating The grating 8 and the total mirror 13; the gain fiber includes a first gain fiber 3 and a second gain fiber 4; the laser output device includes an optical isolator 9, a circulator 11 and a fiber splitter 12.

[0038] When a linear cavity structure is adopted, the first reflective fiber Bragg grating 5 and the second reflective fiber Bragg grating 6 constitute an internal resonant cavity, which includes the first gain fiber ...

Example Embodiment

[0044] Example two

[0045] Such as figure 2 As shown, the basic structure is similar to the first embodiment, but the difference is that the pump source 1 and the fiber combiner 2 are placed between the first reflective fiber Bragg grating 5 and the second gain fiber 4. This can reduce the laser output requirements on the device to a certain extent.

Example Embodiment

[0046] Example three

[0047] Such as image 3 Shown. In the figure, 1 is the pump source, and a semiconductor laser diode with a center wavelength of 976nm can be used; 2 is an optical fiber combiner, and a pump signal combiner of (2+1)×1 can be used, such as 6 / 125 or 10 / 125 type; 3 and 4 are rare-earth-doped fibers, and ytterbium-doped fibers with a core diameter of 6μm or 10μm produced by Nufern in the United States can be used; 5 and 8 are reflective fiber Bragg gratings, and all-reflection or partial reflection gratings can be used , The reflectivity is between 0 and 1; 7 is a broadband semiconductor saturable absorber, other broadband reflective saturable absorbers can also be used; 9 is an optical isolator, optional polarization-independent optical isolator.

[0048] The pump light generated by the pump source 1 enters the second gain fiber 4 through the pump end of the fiber combiner 2, and then reaches the third reflective fiber Bragg grating 8, which is a high inversion...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Center wavelengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a double-resonant-cavity coupled all-fiber Q-switched mode-locked pulse laser. The double-resonant-cavity coupled all-fiber Q-switched mode-locked pulse laser comprises a pumping device, a laser resonant cavity, a gain optical fiber and a laser output device, wherein the laser is provided with a linear cavity or an annular cavity structure for outputting laser pump, whereinthe pumping device comprises a pumping source, an optical fiber beam combiner and a wavelength division multiplexer; the laser resonant cavity comprises a first reflection type fiber bragg grating, asecond reflection type fiber bragg grating, a semiconductor saturable absorption mirror, a third reflection type fiber bragg grating and a total reflection mirror; the gain optical fiber comprises afirst gain optical fiber and a second gain optical fiber; and the laser output device comprises an optical isolator, an annular device and an optical fiber beam splitter. The mode-locked pulse laser adopts the all-fiber structure, which is simple in design and compact in structure, and capable of effectively improving laser output efficiency and stability and outputting the Q-switched mode-lockingpulse with high single-pulse energy and narrow pulse width.

Description

technical field [0001] The invention belongs to the technical fields of laser technology, fiber optics and nonlinear optics, and in particular relates to a double-cavity coupled all-fiber Q-switched mode-locked pulse laser. Background technique [0002] Due to its small size, light weight, high conversion efficiency, compact structure, low cost, easy heat dissipation, good output beam quality, and easy maintenance, fiber lasers have become one of the research hotspots in the laser field in recent years. It has been widely used in fields such as laser processing, laser medical treatment, optical communication, national defense and scientific research. [0003] At present, in fiber lasers, there are two ways to achieve pulses: one is Q-switching, which is divided into active Q-switching and passive Q-switching. The pulse width obtained by Q-switching is generally in the order of μ s to ns; One is mode-locking, which is divided into active mode-locking and passive mode-locking...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01S3/11
CPCH01S3/1115
Inventor 王璞王敏程昭晨
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap