A simple robust interferometer using a laser diode subject to optical feedback from the interferometer is presented. Fringe phase can be locked by the optical feedback within less than 0.2(pi) (peak to valley value) even when the interferometer is placed outside optical benches where the fringe movement caused by vibration amounts to about 6(pi) (peak to valley value) in the absence of optical feedback. The fringe locking is caused by the change of lasing wavelength that suppresses the net phase change to be much less than 2(pi) . The locked fringe pattern with spatial carries can be analyzed by a fringe analyzer at video rate and the measured results of a spherical mirror showed the same accuracy as on an optical bench.
Laser diode optical feedback interferometer for surface measurement outside optical benches
Optical Engineering for Sensing and Nanotechnology (ICOSN '99) ; 1999 ; Yokohama,Japan
Proc. SPIE ; 3740
1999-05-07
Conference paper
Electronic Resource
English
Fringe locking in a laser diode interferometer by optical feedback [3479-11]
British Library Conference Proceedings | 1998
|Feedback type of laser diode interferometer with an optical fiber [2860-25]
British Library Conference Proceedings | 1996
|Torque measurement uncertainty in wind turbine test benches
TIBKAT | 2021
|Monolithic Fabrication of 54.74 Degree Inclined Scanning Mirror and Optical benches
British Library Conference Proceedings | 2004
|British Library Conference Proceedings | 1995
|