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

Broadband high-efficiency fused quartz transmission polarization correlation raster

A fused-silica, polarization-dependent technology for high-efficiency fused-silica grating applications

Active Publication Date: 2010-11-03
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as far as we know, so far, no one has given the design parameters of broadband, high-efficiency, high-density, deep-etched fused silica transmission gratings for the commonly used 800 nm wavelength band.

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
  • Broadband high-efficiency fused quartz transmission polarization correlation raster
  • Broadband high-efficiency fused quartz transmission polarization correlation raster
  • Broadband high-efficiency fused quartz transmission polarization correlation raster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Using micro-optical technology to manufacture broadband high-efficiency high-density deep-etched rectangular gratings, first deposit a layer of metal chromium film on a dry and clean fused silica substrate, and evenly coat a layer of positive photoresist on the chromium film (Shipley, S1818 , USA). The grating is then recorded holographically (see Figure 4 ), using a He-Cd laser 7 (with a wavelength of 441 nm) as the recording light source. When recording the holographic grating, the shutter 8 is opened, and the narrow beam emitted from the laser is divided into two narrow beams by the beam splitter 9. After one beam passes through the mirror 10, it passes through the beam expander 14 and the lens 16 to form a wide plane wave; after the other beam passes through the mirror 11, it passes through the beam expander 15 and the lens 17 to form a wide plane wave. After the two beams of plane waves pass through the mirrors 12 and 13 respectively, they form an interference f...

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 broadband high-efficiency fused quartz transmission polarization correlation raster with 800 nanometers waveband, wherein the duty ratio of the raster is 0.5, the period of the raster is 680-890 nanometers and the etching depth of the raster is 1150-1250 nanometers for a TE polarized light; and the period of the raster is 870-890 nanometers and the etching depth of the raster is 1570-1630 nanometers for a TM polarized light. The broadband high-efficiency fused quartz transmission polarization correlation raster is formed by using an optical holographic record technology or combining an electron beam vertical writing device with a micro-electronic deep etching process, has complete process, low cost and important practical prospect and can be produced massively.

Description

technical field [0001] This patent relates to a high-efficiency fused silica grating, especially a broadband high-efficiency fused silica transmission polarization-dependent grating in the 800 nanometer band. Background technique [0002] Gratings are widely used in various optical systems, and one of the important uses is as a dispersion element in lasers, femtosecond pulse compression systems and wavelength division multiplexing systems. Traditional broadband high-efficiency gratings used in femtosecond pulse compression systems are divided into two categories: one is sinusoidal gold gratings, which have a low anti-damage threshold of only 0.2J / cm 2 ; The other type is based on the all-dielectric grating of the multilayer dielectric film reflector on the back, and its bandwidth is relatively narrow (about 40nm), and there are also disadvantages such as high cost and difficult manufacture. Some literatures have reported high-efficiency fused silica gratings, but mainly for...

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): G02B5/18
Inventor 周常河吕鹏冯吉军贾伟
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com