| Popis: |
The use of fiber optics in the field of optical holography is described with emphasis on compensation of fringe instabilities and the ability to select any specified intensity ratio between object and reference beams. After a brief introduction to fiber optic holography, and its advantages over conventional holography, a method of phase compensation using a Michelson interferometer and a piezoelectric phase modulator is described. Also discussed is a method of varying the coupling ratio between outputs of a single mode fiber optic coupler for holographic applications by incorporating a Mach-Zehnder interferometer. Futhermore, a few practical techniques involved in fiber optic holography are discussed. |
