Device for measuring optical frequency modulation characteristic

Details Device for measuring optical frequency modulation characteristic Device for measuring optical frequency modulation characteristic

1989-04-13

1990-12-25

Willis, Davis L.

Optics: measuring and testing

By particle light scattering

With photocell detection

356349, G01B 902

Patent

active

049798251

ABSTRACT:
A system for a Mach-Zender interferometer which eliminates amplitude modulation of the input light and determines the frequency modulation. Two photodetectors in series are used to receive two outputs of two arms of a Mach-Zender interferometer. The outputs of the photodetectors are summed. The path length difference is controlled by a heater which itself is controlled by a controller. The controller selectively controls the heater based on how much non-zero components are present in the output of the photodetectors.

REFERENCES:
patent: 3508060 (1970-04-01), Boykin
patent: 4759627 (1988-07-01), Thylen et al.
Fritsch et al., "Simple Circuit for Feedback Stabilization of a Single-Mode Optical Fiber Interferometer", Review Sci. Instrum., vol. 52, pp. 996-1000, 7/1981.

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