Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ultra-narrow linewidth fiber laser capable of suppressing relaxation oscillation

A fiber laser and relaxation oscillation technology, which is applied in the field of lasers, can solve problems such as the instability of laser output light, and achieve the effect of suppressing relaxation oscillation noise and reducing intensity noise

Active Publication Date: 2021-10-19
廊坊市路环科技有限公司
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the laser is turned on, it is equivalent to giving a step signal to its pump source; due to the sudden change of the laser pump source, the number of inversion particles and the density of photons in the laser change drastically, so that the output light of the laser shows the characteristics of relaxation oscillation; When the pump source of the laser works continuously under constant current drive, the relaxation oscillation still exists; the existence of the relaxation oscillation causes the output light of the laser to be unstable, that is, the intensity noise of the laser has a peak at the relaxation oscillation frequency; The existence of oscillation noise limits the application in fields such as high-precision distributed optical fiber sensing

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
  • Ultra-narrow linewidth fiber laser capable of suppressing relaxation oscillation
  • Ultra-narrow linewidth fiber laser capable of suppressing relaxation oscillation
  • Ultra-narrow linewidth fiber laser capable of suppressing relaxation oscillation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0036] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0037] Please refer to figure 1 , this embodiment provides an ultra-narrow linewidth fiber laser capable of suppressing relaxation oscillations, the fiber laser sequentially includes a pumping laser source 10, a first wavelength division multiplexer 20, a phase shift grating 30, An erbium-doped f...

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

No PUM Login to View More

Abstract

The invention discloses an ultra-narrow linewidth fiber laser capable of suppressing relaxation oscillation. The fiber laser sequentially comprises a pumping laser source, a first wavelength division multiplexer, a phase shift grating, an erbium-doped fiber, a second wavelength division multiplexer, an isolator and a coupler in the optical path transmission direction. A feedback module is arranged between the coupler and the pumping laser source; laser is divided into output light and feedback light in the coupler; the feedback light is input into the feedback module to form a feedback signal; and the feedback module is configured to adjust the driving current of the pumping laser source by using the feedback signal according to the change value of the output power of the pumping laser source so as to suppress relaxation oscillation noise. The relaxation oscillation noise of the ultra-narrow linewidth fiber laser is suppressed through a photoelectric feedback method, so that the intensity noise of the ultra-narrow linewidth fiber laser at the relaxation oscillation frequency is reduced by nearly 20dB.

Description

technical field [0001] The present disclosure generally relates to the technical field of lasers, and in particular relates to an ultra-narrow linewidth fiber laser capable of suppressing relaxation oscillation. Background technique [0002] Ultra-narrow linewidth fiber lasers are widely used in distributed fiber optic sensing and other fields due to their good monochromaticity, high energy conversion rate, compact structure, and high reliability. The application of high-precision distributed optical fiber sensing has high requirements for laser noise performance, especially relaxation oscillation noise characteristics. [0003] There are relaxation oscillations in the process of laser establishment. When the laser is turned on, it is equivalent to giving a step signal to its pump source; due to the sudden change of the laser pump source, the number of inversion particles and the density of photons in the laser change drastically, so that the output light of the laser shows...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/091H01S3/067
CPCH01S3/0912H01S3/067
Inventor 李文龙李环宇赵紫铜
Owner 廊坊市路环科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com