Dual-frequency laser optical feedback displacement measurement system with nanometer resolution

2009 ◽  
Vol 2009 (4) ◽  
pp. 7-12
Author(s):  
Li Zhang ◽  
Lufei Zhou ◽  
Yidong Tan ◽  
Shulian Zhang
Keyword(s):  
Measurement System ◽  
Optical Feedback ◽  
Displacement Measurement ◽  
Dual Frequency ◽  
Nanometer Resolution ◽  
Frequency Laser

scholarly journals Study on displacement measurement with optical feedback of dual frequency laser

2006 ◽  
Vol 55 (9) ◽  
pp. 4704
Author(s):  
Mao Wei ◽  
Zhang Shu-Lian ◽  
Zhang Lian-Qing ◽  
Zhu Jun ◽  
Li Yan
Keyword(s):  
Optical Feedback ◽  
Displacement Measurement ◽  
Dual Frequency ◽  
Frequency Laser

Compact Displacement Measurement System Based on Microchip Nd:YAG Laser with Birefringence External Cavity

2008 ◽  
Vol 381-382 ◽  
pp. 39-42
Author(s):  
Y. Tan ◽  
S. Zhang
Keyword(s):  
Phase Difference ◽  
Measurement System ◽  
Nd:Yag Laser ◽  
Optical Feedback ◽  
External Cavity ◽  
Laser Wavelength ◽  
Displacement Measurement ◽  
Movement Direction ◽  
Wave Plate ◽  
Length Changes

We demonstrate a method of displacement measurement based on Nd:YAG laser with birefringence external cavity. The measurement system is composed of Nd:YAG laser, a wave plate with phase retardation of 450 and an external feedback mirror. Due to the birefringence effect, the external cavity modulates the laser output intensities in the two orthogonal directions with a phase difference of 900, which is two times to that of the wave plate. Both the in-quadrature laser intensities vary one period, when the external cavity length changes λ/2. These two channel laser intensities with phase difference of 900 can be subdivided to λ/8 after 4-fold evaluation. The movement direction of external mirror can be distinguished by the lead or lag between these two channel signals. Our method can improve the resolution of displacement measurement 4 times that of conventional optical feedback, and reach 133nm for a laser wavelength of 1.064µm.

A Nanometric Displacement Measurement System Using Differential Optical Feedback Interferometry

2013 ◽  
Vol 25 (21) ◽  
pp. 2074-2077 ◽  
Author(s):  
Francisco J. Azcona ◽  
Reza Atashkhooei ◽  
Santiago Royo ◽  
Jorge Mendez Astudillo ◽  
Ajit Jha
Keyword(s):  
Measurement System ◽  
Optical Feedback ◽  
Displacement Measurement

A 450 MHz frequency difference dual-frequency laser with optical feedback

2004 ◽  
Vol 231 (1-6) ◽  
pp. 349-356 ◽  
Author(s):  
Gang Liu ◽  
Shulian Zhang ◽  
Lu Li ◽  
Yan Li ◽  
Jun Zhu
Keyword(s):  
Optical Feedback ◽  
Frequency Difference ◽  
Dual Frequency ◽  
Frequency Laser

Strong optical feedback in birefringent dual frequency laser

2006 ◽  
Vol 15 (2) ◽  
pp. 340-346 ◽  
Author(s):  
Mao Wei ◽  
Zhang Shu-Lian
Keyword(s):  
Optical Feedback ◽  
Dual Frequency ◽  
Frequency Laser
Sign in / Sign up

Export Citation Format

Share Document