A new technique that provides linear measurement of dynamic phase change in a no-feedback, no-phase-bias fiberoptic interferometer is described. The phase measurement is unaffected by random changes in phase, source intensity, and fringe visibility. A minimum detectable phase shift of 0.1 rad has been measured for the configuration reported.
© 1989 Optical Society of America
Original Manuscript: July 28, 1988
Manuscript Accepted: November 6, 1988
Published: January 15, 1989
V. S. Sudarshanam and K. Srinivasan, "Linear readout of dynamic phase change in a fiber-optic homodyne interferometer," Opt. Lett. 14, 140-142 (1989)