Method and device for locking laser frequency to optical frequency comb based on undersampling

A frequency locking and optical frequency comb technology, applied in lasers, laser parts, semiconductor lasers, etc., can solve the problem of difficulty in improving the signal-to-noise ratio of beat frequency signals, and achieve the effects of improving stability, reducing output noise and fast locking.

Active Publication Date: 2017-10-10
ZHEJIANG SCI-TECH UNIV
View PDF4 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the background technology, the present invention discloses a method and device for locking the laser frequency to an optical frequency comb based...

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
  • Method and device for locking laser frequency to optical frequency comb based on undersampling
  • Method and device for locking laser frequency to optical frequency comb based on undersampling
  • Method and device for locking laser frequency to optical frequency comb based on undersampling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] In the embodiment of the present invention, the output wavelength of the tunable laser is 633nm, and the laser wavelength can be adjusted by the PZT modulation terminal and the current modulation terminal; the femtosecond optical frequency comb system of Menlo Company is adopted, and the frequency comb repetition frequency f r =250MHz, optical frequency comb bias frequency f o =20MHz; the bandwidth of the photodetector is 1.1GHz, and the filter of the beat frequency signal is composed of four notch filters in series, and the notch frequencies are 250MHz, 500MHz, 750MHz, and 1000MHz; the analog bandwidth of the ADC chip is 1GHz, and the sampling frequency is 250MHz; field programmable gate array signal processor is ZYNQ7020, built-in dual-core ARM A9 processor.

[0045] The specific implementation is as follows:

[0046] Such as figure 1 As s...

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 a method and a device for locking laser frequency to an optical frequency comb based on undersampling. The method comprises the steps of performing laser combination processing on to-be-stabilized frequency laser and laser of the optical frequency comb to obtain a detection signal, removing intermode self-beat signals between comb teeth of the optical frequency comb by a filter, performing undersampling acquisition on reserved beat signals into digital signals, reflecting or folding frequency spectra of the beat signals to a first nyquist region during an undersampling course, superimposing the beat signals to obtain a total beat signal, obtaining a phase error signal between the total beat signal and a reference sine signal by a phase locking amplifier, obtaining a frequency feedback control signal by digital PID (Proportion Integration Differentiation) operation, and adjusting output frequency of a to-be-stabilized frequency laser device by the frequency feedback control signal to realize offset frequency locking. The method and the device solve the problem of difficult increase of signal-to-noise ratios of the beat signals in a technology of locking a laser device to the optical frequency comb, improve the laser frequency stability, and can be widely applied to the field of laser precision metering.

Description

technical field [0001] The invention belongs to the technical field of laser frequency stabilization, in particular to a method and device for locking laser frequency to an optical frequency comb based on undersampling. Background technique [0002] Laser interferometry technology has the advantages of fast response speed, high measurement accuracy, strong anti-interference ability, and direct traceability to the definition of meters. Therefore, it is widely used in high-precision displacement measurement, ultra-precision processing and manufacturing, and instrument testing and calibration. The key to laser frequency stabilization technology is to select a stable reference frequency standard. Common laser frequency stabilization technologies can be divided into four categories: the first category is based on the center frequency of the gain curve and the center frequency of the Lamb sag, but the center frequency It is easily affected by conditions such as temperature and air...

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): H01S3/13H01S5/068
CPCH01S3/13H01S5/068
Inventor 谢建东严利平陈本永
Owner ZHEJIANG SCI-TECH 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