Adaptive double optical comb spectral compensation signal extraction method

A technology of compensation signal and extraction method, which is applied in the field of photoelectric detection, can solve problems affecting system stability, reliability, abnormal operation of adaptive compensation system, spectral interference of adaptive optical comb, etc., and achieve high-precision adaptive dual optical comb Spectrum, avoid random jitter, improve the effect of detection sensitivity

Active Publication Date: 2016-08-03
CHONGQING MENGHE BIOTECHNOLOGY CO LTD
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the current adaptive dual-comb spectroscopy system, the source of the compensation signal comes from the mutual optical beat frequency of two narrow linewidth continuous lasers and two ultrashort pulse lasers. Due to environmental temperature and vibration changes, each narrow linewidth laser or The optical frequency of an ultrashort pulse laser will drift randomly with time. Therefore, the center frequency of the optical beat signal will also drift randomly with time, and the drift range is very large, which can easily exceed the bandwidth of the circuit filter, resulting in the loss of the beat signal. The circuit processing module fails, and the adaptive compensation system works abnormally
In order to control the drift range of optical beat frequency signals of narrow-linewidth CW lasers and ultrashort pulse lasers, a n

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
  • Adaptive double optical comb spectral compensation signal extraction method
  • Adaptive double optical comb spectral compensation signal extraction method
  • Adaptive double optical comb spectral compensation signal extraction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] See attached figure 2 , the present invention consists of two pulsed lasers 11,12, two Michelson interferometers 21,22, two optical beam splitters 31,32, four optical filters 41,42,43,44, four photodetectors 51, 52, 53, 54, four electrical frequency doubling and filtering units 61, 62, 63, 64, two first-level mixers 71, 72, one second-level mixer 8 and a dual-comb spectral data processing unit 9 The extraction system of adaptive dual optical comb spectral compensation signal composed of space structure.

[0026] The output light of the ultrashort pulse laser 11 is incident on the Michelson interferometer 21, wherein the Michelson interferometer 21 is composed of a beam splitter 211, a first Faraday reflector 212, a second Faraday reflector 215, a time delay crystal 213 and It is composed of an acousto-optic modulator 214 driven by a belt, and the modulation frequency is fa. The output light of the ultrashort pulse laser 11 passes through the beam splitter 211 and is ...

Embodiment 2

[0032] See attached image 3 , the present invention consists of two pulsed lasers 11,12, two Michelson interferometers 21,22, two optical beam splitters 31,32, four optical filters 41,42,43,45, four photodetectors 51, 52, 53, 54, four electrical frequency doubling and filtering units 61, 62, 63, 64, two primary mixers 71, 72, a secondary mixer 8 and a dual optical comb spectral data processing unit 9 The extraction system of adaptive dual-comb spectral compensation signal composed of optical fiber structure.

[0033]The output light of the ultrashort pulse laser 11 is incident on the Michelson interferometer 21, wherein the Michelson interferometer consists of a fiber coupler 211, a first Faraday reflector 212, a second Faraday reflector 215, a time-delay fiber 213 and a ribbon The driven acousto-optic modulator 214 is composed of the modulation frequency fa. The output light of the pulsed laser 11 passes through the fiber coupler 211 and is divided into two beams of light ...

Embodiment 3

[0039] See attached Figure 4 , the present invention consists of two pulsed lasers 11,12, sample pool 10, interference signal detection module 14, two Michelson interferometers 21,22, two optical beam splitters 31,32, four optical filters 41,42 , 43, 44, four photodetectors 51, 52, 53, 54, four electrical frequency multiplication and filtering units 61, 62, 63, 64, two primary mixers 71, 72, and a secondary It is composed of a device 8, an adaptive dual-comb spectroscopy system data processing unit 9 and a spectral measurement result output module 13.

[0040] The output of the ultrashort pulse laser 11 is divided into two paths, one path is directly incident to the sample cell 10, and the other path is incident to the Michelson interferometer 21, wherein the Michelson interferometer is composed of a beam splitter 211, a first Faraday reflector 212 , a second Faraday reflector 215, a delay crystal 213 and a band-driven acousto-optic modulator 214, and the modulation frequenc...

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 adaptive double optical comb spectral compensation signal extraction method. The adaptive double optical comb spectral compensation signal extraction method is characterized in that Michelson interferometers and electricity beat frequency acquire adaptive double optical comb spectral compensation signals; the time domain time-delay and frequency domain selection mode is used; the Michelson interferometers are effectively used to detect the pre pulse and after pulse of certain time-delay, and extract the signals representing the self repetition rate jitter and carrier envelope phase jitter of single pulse laser; and at last, through the electricity frequency multiplication and frequency mixing process, the compensation signals representing the corresponding repetition rate jitter and the corresponding carrier envelope phase jitter of the two pulse lasers can be obtained, and the compensation signals can be directly used for adaptive double optical comb spectral measurement. Compared with the prior art, the adaptive double optical comb spectral compensation signal extraction method completely avoid the mode that two narrow line-width continuous lasers are required to introduce in the adaptive double optical comb spectrum to extract compensation signals, so that the compensation signals are slightly interfered by the continuous optical wavelength drifting and is stable and reliable, and the stability and reliability of the adaptive double optical comb spectral system can be further improved.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to an adaptive dual-comb spectral compensation signal extraction method based on Michelson interferometer. Background technique [0002] As a frontier topic in the field of scientific research in recent years, dual-comb spectroscopy technology can greatly improve the accuracy of spectral detection. Compared with the traditional technology, the dual optical comb spectral detection technology has two improvements. One is to use an optical comb to replace the traditional light source. As a standard, the position of the frequency spectral line is more stable, the line width is narrower, and the accuracy is higher; Optical combs with slightly different frequencies are measured at the same time. One is used as a reference comb and the other is used as an excitation comb, which is similar to the main scale and auxiliary scale of a vernier caliper. Through frequency misalign...

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): G01J3/45
CPCG01J3/45
Inventor 曾和平杨康文郝强
Owner CHONGQING MENGHE BIOTECHNOLOGY CO LTD
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