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

Method and device for measuring refractive index of optical waveguide group

A technology of group refractive index and measurement method, which is applied in the direction of refractive power measurement and optical performance test, can solve the problems of low precision and poor universality, and achieve the effect of high measurement precision, high accuracy and simple measurement method

Active Publication Date: 2022-06-28
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for measuring the refractive index of the optical waveguide group to solve the problems of low precision and poor universality of the traditional waveguide group refractive index measurement method

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 measuring refractive index of optical waveguide group
  • Method and device for measuring refractive index of optical waveguide group
  • Method and device for measuring refractive index of optical waveguide group

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] An optical waveguide group refractive index measurement method for horizontal end-face coupled optical waveguides, such as figure 1 As shown, the measurement device includes a continuous wave laser 1, an optical single sideband modulator 3, an optical waveguide chip 4, a photodetector 11 and a vector network analyzer 12; the optical signal is modulated by the optical single sideband modulator, and then converted by The coupling input fiber 5 is coupled with the coupling input port 7, and the optical signal is transmitted through the optical waveguide and is output to the coupling output fiber 6 by the coupling output port 8, and is connected to the photodetector 11 for photoelectric conversion, and the detected signal is input to the vector In the two ports 16 of the network analyzer, the response of the optical waveguide is obtained.

[0050] The optical waveguide chip 4 includes two optical waveguides with lengths of 1000 microns and 2000 microns respectively.

[005...

Embodiment 2

[0078] An optical waveguide group refractive index measurement method for grating vertically coupled optical waveguides, such as figure 1 The measuring device shown includes a continuous wave laser 1, an optical single sideband modulator 3, an optical waveguide chip 4, a photodetector 11 and a vector network analyzer 12;

[0079] The continuous wave laser 1 is connected to the optical single sideband modulator 3 through the fiber 2, the optical single sideband modulator 3 is connected to the coupling input fiber 5, and the output fiber 6 is connected to the photodetector 11, and the photodetector 11 is connected to the vector network analyzer. The high frequency cable 14 of port two is connected to port two 16 of the vector network analyzer. The port one 15 of the vector network analyzer is connected to the optical single sideband modulator 3 through the high frequency cable 13 of the port one of the vector network analyzer.

[0080] The optical signal is modulated by the opt...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method and device for measuring the refractive index of an optical waveguide group. The method includes: outputting an optical carrier to an optical single sideband modulator, loading a radio frequency signal output from port one of a vector network analyzer to the modulator to modulate the light wave; modulating The final optical signal is coupled to the first optical waveguide, coupled and output to the photodetector after passing through the optical waveguide chip, and the detected signal is input to port 2 of the vector network analyzer, and the direct connection of the vector network analyzer is performed by using this loop Calibration; the modulated optical signal is coupled to a second optical waveguide of different lengths, after the optical waveguide is transmitted, it passes through the optical waveguide chip and then coupled to the photodetector, and the detected signal is input to the port of the vector network analyzer Second, get the response S at this time from the test in the vector network analyzer 21 ; Calculate the group index of refraction of the optical waveguide. The invention can meet the group refraction index measurement of the end surface coupling waveguide and the vertical grating coupling optical waveguide at the same time, and the calculation is simple and accurate.

Description

technical field [0001] The invention belongs to the technical field of integrated photonic device measurement, in particular to a method and device for measuring the refractive index of an optical waveguide group. Background technique [0002] In integrated photonic devices, the optical waveguide is the most basic structure for constructing photonic integrated devices and chips, and is the further component of other passive, active photonic and optoelectronic devices, such as optical delay lines, beam splitters / combiners, arrayed waveguide gratings , Mach-Zehnder interferometers, micro-ring resonators, modulators, optical switches and other basic building blocks. The basic function of an optical waveguide is to achieve low-loss and low-distortion transmission of light waves, and its waveguide refractive index is one of the most important indicators, which determines the key geometric dimensions of integrated photonic devices. [0003] The effective refractive index and the ...

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): G01M11/02
CPCG01M11/0228
Inventor 顾晓文王琛全钱广牛斌
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD