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

Laser device modulation circuit and laser device modulation method based on white noise

A modulation circuit and white noise technology, applied in the field of optics, can solve problems such as fluctuations in the output optical power of lasers, and achieve the effects of easy operation, low system cost, and simple system

Inactive Publication Date: 2019-02-01
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a laser modulation circuit and method based on white noise, which solves the problem of laser output light power fluctuations caused by coherent interference effects in the prior art

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
  • Laser device modulation circuit and laser device modulation method based on white noise
  • Laser device modulation circuit and laser device modulation method based on white noise

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0018] figure 1 An alternative embodiment of a white noise based laser modulation circuit is shown.

[0019] In this optional embodiment, the laser modulation circuit based on white noise includes an arbitrary waveform generator and an LD bias circuit (laser bias circuit), and the arbitrary waveform generator generates a high-frequency white noise signal, and the high-frequency white noise The signal is loaded to the modulation end of the LD bias circuit. Th...

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 provides a laser device modulation circuit based on white noise. The laser device modulation circuit based on white noise comprises an arbitrary waveform generator and an LD biasing circuit, the arbitrary waveform generator generates high-frequency white noise, and the high-frequency white noise is loaded to an input end of the LD biasing circuit; an output end of the LD biasing circuit provides driving current for a laser device chip D1, and the loaded white noise is superposed on the driving current so as to change the driving current. The laser device modulation circuit basedon white noise of the invention realizes stability of light output by the laser device, is simple in circuit and easy to operate; and compared with a mode of introducing a polarization mode scrambler,system cost is relatively low and system is relatively simple.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a laser modulation circuit and method based on white noise. Background technique [0002] Optical coherence means that the light output by lasers with the same frequency will interfere coherently at the place where the optical fiber is connected during transmission, resulting in instability of the final output laser power. [0003] At present, the method of suppressing laser coherence is mainly to introduce a polarization mode scrambler to suppress the coherence by disturbing the laser mode. Adding a polarization scrambler also increases system cost and complexity. Contents of the invention [0004] The invention proposes a laser modulation circuit and method based on white noise, which solves the problem of laser output light power fluctuations caused by coherent interference effects in the prior art. [0005] Technical scheme of the present invention is realized like this:...

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): H04B10/50
CPCH04B10/505
Inventor 李超朱兴邦
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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