Optical feedback range finder for two-frequency laser based on Zeeman-birefraction |
Title： |
| Optical feedback range finder for two-frequency laser based on Zeeman-birefraction |
|
Application Number： |
200510011514 |
Application Date： |
2005/04/01 |
Announcement Date： |
2005/09/07 |
Pub. Date： |
2007/04/25 |
Publication Number： |
1664613 |
Announcement Number： |
1312488 |
Grant Date： |
2007-4-25 |
Granted Pub. Date： |
2007-4-25 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
G01S 17/08, G01C 3/00, H01S 3/08 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Liu Gang, Zhang Shulian |
Key Words： |
Zeeman-birefraction, two-frequency laser, optical feedback, range finder |
Abstract： |
Light-feedback distometer based on two-frequency laser with Zeeman-birefraction, which belong to laser ranging technology field. The distometer consists of light source, measuring section and signal processing section. Laser outside cavity is tuned to realize laser internal schema transformation and at the same time optical signal feedback detection is exert on laser. The difference of light intensity modulation depth between laser working on longitudinal bimodule and on monomode is relative to outside cavity length. When outside cavity length equals integer multiple laser cavity length modulation depth difference is minimum; when outside cavity length bias from integer multiple laser cavity length, modulation depth enlarges gradually. |
Claim： |
|
Priority： |
|
PCT： |
|
LegalStatus： |
|
Relevancy information
