Passive mode-locking fiber laser based on graded-refractive index multimode fiber saturable absorber

A fiber laser, graded index technology, used in lasers, laser parts, phonon exciters, etc., can solve the problems of limiting laser output power, difficult to generate picoseconds, poor adjustability, etc., to improve stability and Reliability, excellent mechanical properties and long service life

Inactive Publication Date: 2018-07-24
CHINA JILIANG UNIV
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the semiconductor saturable absorber mirror, as the most widely used saturable absorber material, still has some disadvantages. Its characteristics are determined by the design parameters during production, expensive, poor adjustability, and limited by materials, it is difficult to produce Pulses shorter than picoseconds
In addition to graphene, other two-dimensional materials including graphene oxi...

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
  • Passive mode-locking fiber laser based on graded-refractive index multimode fiber saturable absorber
  • Passive mode-locking fiber laser based on graded-refractive index multimode fiber saturable absorber
  • Passive mode-locking fiber laser based on graded-refractive index multimode fiber saturable absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example presents a passively mode-locked fiber laser based on a "graded-index fiber saturable absorber" fiber device. refer to figure 1 Shown is a schematic structural diagram of the mode-locked fiber laser of the present invention. The pump source 1 introduces the pump laser light into the erbium-doped fiber 3 through the wavelength division multiplexer 2, and after the pump light is amplified by the erbium-doped fiber 3, it forms oscillation in the ring cavity to generate laser light. The pigtails of all components in the cavity are ordinary single-mode fibers with a working center wavelength of 1550nm. The central wavelength of the pump source is 976nm, the core diameter of the gain fiber is 9μm, the absorption coefficient of the pump light is 55dB / m@1532nm, and the length of the gain fiber is 2.5m. The working center wavelength of the polarization-independent isolator 4 is 1550nm, and its function is to ensure the one-way transmission of the laser, and the is...

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
Wavelengthaaaaaaaaaa
Lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a passive mode-locking fiber laser based on a graded-refractive index multimode fiber saturable absorber, and relates to the field of fiber lasers. The passive mode-locking fiber laser adopts a ring cavity structure, and includes a semiconductor pumping source, and a wavelength division multiplexer, an erbium-doped fiber, a polarization-independent isolator, a graded-refractive index fiber saturable absorber device, and an output coupler which are successively form a beam loop. The graded-refractive index fiber saturable absorber device functions as a saturable absorberon the basis of the nonlinear multimode interference effect in the graded-refractive index fiber, and is composed of a two single-mode fibers intermediately fused with a graded-refractive index multimode fiber. Two ends of the saturable absorber device are fixed on a movable fiber clamp for changing the length of the fiber. The fiber laser realizes the full fiberization of mode-locking lasers, has the advantages of simple structure and high damage threshold, and greatly improves the stability and practicability of the mode-locking lasers.

Description

technical field [0001] The patent of the present invention relates to the field of fiber lasers, in particular to a mode-locked fiber laser based on a "graded-index multimode fiber saturable absorber", in particular to a saturable absorber for mode-locked and Q-switched fiber lasers. Background technique [0002] Ultrashort pulse laser with a pulse width of hundreds of femtoseconds has a wide range of applications in basic research, material fine processing, national defense, biotechnology, medical treatment, and other fields due to its narrow pulse width, high peak power, and wide spectral width. , its development enables us to directly observe many ultrafast reactions in chemistry, biology and other research, and has become one of the core technologies of national strategies and high-end industries. At present, ultrashort pulse lasers are usually obtained by passive mode-locking technology. Compared with active mode-locked fiber lasers, passive mode-locked fiber lasers ha...

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): H01S3/11H01S3/067H01S3/094
CPCH01S3/067H01S3/06708H01S3/094H01S3/1118
Inventor 王兆坤王东宁杨帆李柳江朱天瑜徐贲陈慧芳王海龙赵春柳龚华平
Owner CHINA JILIANG UNIV
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