Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Light division multiplexer with lithium niobate crystal holographic grating

A technology of optical add-drop multiplexer and volume holographic grating, which is applied in the field of optical communication network, can solve the problems affecting the diffraction efficiency of the read-out grating, and achieve the effect of flexible operation, simple structure, and good spatial isolation

Inactive Publication Date: 2005-05-04
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device multiplexes multiple holographic gratings at the same position of the crystal, so that when the latter grating is recorded, the recording light wave has a certain erasure of the previously recorded grating, thus affecting the diffraction efficiency of the readout grating

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
  • Light division multiplexer with lithium niobate crystal holographic grating
  • Light division multiplexer with lithium niobate crystal holographic grating
  • Light division multiplexer with lithium niobate crystal holographic grating

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment

[0046] The specific embodiment of device of the present invention is as follows:

[0047] Crystal 112 is high temperature oxidized LiNbO 3 :Fe:Mn or LiNbO 3 :Ce:Cu single crystal. The crystal is cut into a size of 5×5×30mm 3 The cuboid, all surfaces are optically polished, the optical axis is parallel to the yz plane and the angle with the z axis is 45°. Helium-neon laser is used as the recording light source, which emits ordinary polarized red light with a wavelength of 632.8nm and a light intensity of 600mW / cm 2 ,; 100W spherical high-pressure mercury lamp, filtered by a UV-transparent filter and then focused by a converging lens as a non-polarized UV-sensitized light source, its wavelength is 365nm, and the light intensity is 15mW / cm 2 . The refractive index of recording red light in LiNbO3 crystal is 2.28647, the recording angle θ in the crystal, and the incident angle θ in air i Respectively by (3), (4) two formulas. The traditional symmetrical recording optical pa...

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
wavelengthaaaaaaaaaa
wavelengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

An optical add / drop multiplexer for lithium niobate crystal volume holographic gratings, including monolithic double-doped LiNbO 3 Crystals and several individual holographic gratings recorded in the light wave demultiplexer and the monolithic structure LiNbO with several electrodes 3 A total internal reflection electro-optic switch group composed of crystals. The design of the optical add-drop multiplexer with a wavelength interval of 0.8nm is given. By controlling the state of each electro-optic switch, the wavelength channels that need to be added and dropped can be dynamically selected to realize adding and dropping signals of any wavelength. The invention has the advantages of simple structure, convenient adjustment, reliable operation, anti-environmental interference, etc., and has good application prospects.

Description

technical field [0001] The invention belongs to optical communication network technology, in particular to a double-doped lithium niobate LiNbO 3 The optical add-drop multiplexer of crystal volume holographic grating is suitable for realizing channel separation, transmission, switching and multiplexing of wavelength division multiplexing signals at the optical layer. Background technique [0002] An optical add-drop multiplexer (hereinafter referred to as OADM) is an essential and important device in an optical communication network. The function of the OADM node is to select the signal leading to the local user in the underground (drop) channel from the transmission system, and at the same time add (add) the signal sent by the local user to another node user. The adding and dropping cannot affect other wavelengths at the same time. channel transmission. The basic principle of the optical add-drop multiplexer is: the wavelength division multiplexed optical signal is first ...

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): G02B6/34G02F1/03H04J14/02
Inventor 董前民刘立人刘德安栾竹周煜祖继锋
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com