Active Phase Compensation System For Fiber Optic Holography

Carolyn R. Mercer; Glenn Beheim

doi:10.1117/12.948017

27 January 1989 Active Phase Compensation System For Fiber Optic Holography

Carolyn R. Mercer, Glenn Beheim

Proceedings Volume 0965, Current Developments in Optical Engineering III; (1989) https://doi.org/10.1117/12.948017
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

Fiber optic delivery systems promise to extend the application of holography to severe environments by simplifying test configurations and permitting the laser to be remotely placed in a more benign location. However, the introduction of optical fiber leads to phase stability problems. Environmental effects cause the pathlengths of the fibers to change randomly, preventing the formation of stationary interference patterns which are required for holography. An active phase control system has been designed and used with an all-fiber optical system to stabilize the phase difference between light emitted from two fibers, and to step the phase difference by 90° without applying any constraints on the placement of the fibers. The accuracy of the phase steps is shown to be better than 0.02°, and a stable phase difference can be maintained for 30 min. This system can be applied to both conventional and electro-optic holography, as well as to any system where the maintenance of an accurate phase difference between two coherent beams is required.

Citation Download Citation

Carolyn R. Mercer and Glenn Beheim "Active Phase Compensation System For Fiber Optic Holography", Proc. SPIE 0965, Current Developments in Optical Engineering III, (27 January 1989); https://doi.org/10.1117/12.948017

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