Unlock instant, AI-driven research and patent intelligence for your innovation.

Gas refractive index measurer and measuring method thereof based on optical frequency comb

A gas refractive index and optical frequency comb technology, which is applied in the measurement of phase influence characteristics, etc., can solve the problems of limited measurement accuracy, limited measurement range, and difficult instrument processing, and achieves simple equipment, large measurement range, and fast measurement speed. Effect

Inactive Publication Date: 2012-07-18
TSINGHUA UNIV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These measurement methods have their own characteristics, but also have their own shortcomings: either the measurement accuracy is limited, or the measurement time is too long, or the instrument processing is difficult, or the measurement range is limited.

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
  • Gas refractive index measurer and measuring method thereof based on optical frequency comb
  • Gas refractive index measurer and measuring method thereof based on optical frequency comb

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The measurement method of the gas refractive index measuring instrument based on the optical frequency comb of this embodiment of the present invention is: the laser pulse signal sent by the optical frequency comb 1 is evenly divided into two beams by the upper surface and the lower surface of the flat beam splitter 2, wherein The light beam split on the upper surface of the beam splitter 2 propagates through the outer upper part of the vacuum tube 3, and then propagates along the outer lower part of the vacuum tube 3 after being reflected by the corner pyramid reflector 4; After being reflected by the corner pyramid reflective prism 4, it propagates along the inner lower part of the vacuum tube 3, so that the light beams propagating respectively along the outer side and the inner side of the vacuum tube 3 are reflected to the beam splitter 5 after being superimposed on the surface of the flat beam splitter 2, and then split by the beam splitter 5 After being received by...

Embodiment 2

[0025]The measurement method of the gas refractive index measuring instrument based on the optical frequency comb of this embodiment of the present invention is: the laser pulse signal sent by the optical frequency comb 1 is evenly divided into two beams by the upper surface and the lower surface of the flat beam splitter 2, wherein The light beam split on the upper surface of the beam splitter 2 propagates through the outer upper part of the vacuum tube 3, and then propagates along the outer lower part of the vacuum tube 3 after being reflected by the corner pyramid reflector 4; After being reflected by the corner pyramid reflective prism 4, it propagates along the inner lower part of the vacuum tube 3, so that the light beams propagating respectively along the outer side and the inner side of the vacuum tube 3 are reflected to the beam splitter 5 after being superimposed on the surface of the flat beam splitter 2, and then split by the beam splitter 5 After being received by ...

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 gas refractive index measurer and a measuring method thereof based on an optical frequency comb. A flat spectroscope, a vacuum tube, a corner cube retroreflector, a dispersion prism and a plane mirror are arranged in a light splitting direction and a reflection direction of a laser pulse signal optical path corresponding to the optical frequency comb, a spectrum analyzerand a photoelectric detector are both arranged on corresponding optical path and connected with a computer system, and an objective gas refractive index estimation module of the computer system estimates the refractive index of an objective gas, so that the measurer is simple, measurement accuracy is high, measurement speed is high and various gases can be measured by the measure, thus the refractive index of an environmental gas can be accurately monitored in real time, and the measurer can be used in optical precision length measurement, optical design and atmospheric monitoring.

Description

technical field [0001] The invention belongs to the technical field of gas refractive index measurement, and in particular relates to a gas refractive index measuring instrument based on an optical frequency comb and a measurement method thereof. Background technique [0002] The refractive index of gas is an important parameter in the fields of optical precision interferometry and optical design. The influence of air refractive index should be considered in the design and data processing of instruments working in the air environment. Usually, the refractive index of air is about 1.00027, and the variation range is 10-6, so the refractive index of air is generally approximated to 1, but in the high-precision length measurement, the error introduced by this approximation cannot be ignored. In order to achieve a measurement uncertainty of nanometer or even sub-nanometer, it is necessary to accurately measure the refractive index value of air to one ten thousandth, one hundred ...

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 Patents(China)
IPC IPC(8): G01N21/41
Inventor 张继涛李岩尉昊赟
Owner TSINGHUA UNIV