Waveguide type wavelength measuring apparatus

Details Waveguide type wavelength measuring apparatus Waveguide type wavelength measuring apparatus

1994-06-22

1995-05-16

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

356346, 25022723, G01J 300, G01B 902

Patent

active

054165784

ABSTRACT:
A waveguide type wavelength measuring apparatus is provided with a single mode channel type optical waveguide formed on a waveguide substrate, in which the light to be measured is inputted, a double mode waveguide connected to the single mode channel type optical waveguide, waveguide branches for branching the light output from the double mode waveguide, and photodetectors for detecting independently the light branched by the waveguide branches. The wavelength of the inputted light is measured on the basis of the output signals from the photodetectors. Hence it is possible to perform precise real-time measurement of the wavelength of the incident light with a compact and extremely miniaturized structure.

REFERENCES:
patent: 4761049 (1988-08-01), Burns et al.
patent: 4779984 (1988-10-01), Cook
Yap et al, "Passive Ti:LiNbO.sub.3 Channel Waveguide TE-TM Mode Splitter" Applied Physics Letters vol. 44, #6, Apr. 15, 1984, pp. 583-585.

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