Optical spectrum analyzer

Details Optical spectrum analyzer Optical spectrum analyzer

1988-07-20

1990-02-13

Lee, John D.

Optics: measuring and testing

Range or remote distance finding

With photodetection

350 9614, 350358, 356302, 356303, 356346, G02B 610, G01J 340

Patent

active

049001132

ABSTRACT:
An optical spectrum analyzer comprises an optical waveguide formed of a material allowing propagation of surface acoustic waves therethrough, and a surface acoustic wave generator for generating a surface acoustic wave, the frequency of which changes continuously and which advances in a direction intersecting an optical path of a guided optical wave as light-to-be-analyzed entered to the optical waveguide and advancing inside of the optical waveguide and diffracts and deflects the guided optical wave, in the optical waveguide. A photodetector is provided for detecting the optical level of the optical wave guided, deflected by the surface acoustic wave and radiated out of the optical waveguide. A frequency detector is provided for detecting the frequency of the surface acoustic wave at the time the photodetector detects the optical level of the optical wave guided, deflected by the surface acoustic wave and radiated out of the optical waveguide.

REFERENCES:
patent: 4297704 (1981-10-01), Marom et al.
patent: 4595253 (1986-06-01), Yamashita et al.

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