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

Polarization-independent regualtable acousto-optic filter and its method

An acousto-optic filtering and tunable technology, which can be used in instruments, optics, nonlinear optics, etc., and can solve the problems of low splitting ratio, bulky, and expensive polarization beam splitters.

Inactive Publication Date: 2004-05-19
IND TECH RES INST
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-collinearity means that the light wave and the sound wave do not travel in the same axis. A non-collinear polarization-independent adjustable acousto-optic filter proposed by US Patent No. 6,016,216 can satisfy the aforementioned three conditions, but the patent discloses The polarization beam splitter (

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
  • Polarization-independent regualtable acousto-optic filter and its method
  • Polarization-independent regualtable acousto-optic filter and its method
  • Polarization-independent regualtable acousto-optic filter and its method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Please refer to FIG. 1 . FIG. 1 is an optical path diagram of an x-z ​​plane and a y-z plane of a polarization-independent adjustable acousto-optic filter device.

[0015] The present invention is an adjustable acousto-optic filter device which has nothing to do with polarization, which is used to diffract the input light so that it becomes the first output light which is not affected by the sound wave and the second output light which is affected by the sound wave. The acousto-optic filter device comprises : first polarization splitter 10, first polarization rotator 20, acousto-optic device 30, second polarization splitter 40, second polarization rotator 50, third polarization rotator 60, third polarization splitter 70 .

[0016] The first polarization separator 10 is used for polarization-separating the input light 100 so that it becomes orthogonal first polarized light and second polarized light. The first polarization separator 10 can be a birefringent crystal.

...

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 relates to a device of adjustable acoustic-optical filter and its method non relevant to polarization. Input light to be diffracted becomes first output light not affected by acoustic wave and second output light affected by acoustic wave. The input light is separated into two orthogonal beams by using the polarization separator in the invention. Several polarization rotators make polarization direction of light rotate 90 degrees. Acoustic-optic apparatus makes polarization direction of specific light rotate 90 degrees. The two orthogonal beams are then combined. The filtration mode is non relevant to the polarization property of the incident light. The invention has features of high radio of beam split, small volume and low cost.

Description

technical field [0001] The present invention relates to a polarization-independent adjustable acousto-optic filter device and a method thereof, in particular to a polarization-independent adjustable acousto-optic filter device and method applicable to a high-density wavelength division multiplexing (DWDM) system. its method. Background technique [0002] When sound waves pass through the medium, periodic elastic deformation occurs inside the medium, which causes periodic changes in the refractive index of the medium, which is equivalent to a moving phase grating, and the light will be diffracted by the phase grating. This phenomenon is called "acousto-optic effect". . [0003] Tunable acousto-optic filter (AOTF for short) is a component that utilizes the acousto-optic effect. When the input light contains many different wavelengths, the light of different wavelengths can be diffracted and output by changing the frequency of the external sound wave. Because the center wave...

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): G02F1/11G02F1/33
Inventor 林耕华黄承彬周维仁杨淑媚胡杰
Owner IND TECH RES INST