Interferometer with a single-mode waveguide coil

Details Interferometer with a single-mode waveguide coil Interferometer with a single-mode waveguide coil

1979-01-11

1982-04-20

Corbin, John K.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

350 9615, 356351, G01B 902, G02B 514

Patent

active

043256368

ABSTRACT:
An interferometer with a single-mode optical waveguide wound in a coil which waveguide has a surface at each end for the acceptance of the light into the waveguide ends and for the display of light in the waveguide characterized by an improvement comprising at least one optical directional coupler having four input/output ends being provided. One of the four input/output ends is coupled into one of the pair of ends of the waveguide forming the coil and a second of the input/output ends is coupled to the other end of the pair of ends of the waveguide forming the coil. Preferably, the coupling of light from a light source utilizes a second additional directional coupler, which has an input/output end coupled to a third input/output end of the first mentioned coupler and the device preferably has a pair of light sensitive elements with one of said elements receiving a superimposed image from the fourth input/output end of the first mentioned coupler and the other receiving light from one of the input/output ends of the second or additional coupler.

REFERENCES:
patent: 3395270 (1968-07-01), Speller
patent: 3743962 (1973-07-01), Rosenberg
patent: 4039260 (1977-08-01), Redman
patent: 4054366 (1977-10-01), Barnoski
patent: 4136929 (1979-01-01), Suzaki
patent: 4138196 (1979-02-01), Redman
"Fresnel-Fizeau Effect in a Rotating Optical Fiber Ring Interferometer", Vali et al., Applied Optics, vol. 16, #10, Oct. 1977, p. 2605.
"Sagnac Effect", Post, Review of Modern Physics, vol. 39, #2, 4/67, pp. 475-493.
"Ring Interferometer 950 Meters Long", Vali and Shorthill, Applied Optics, vol. 16, No. 2, 2/77, p. 290.
Bendow et al., Fiber Optics, Plenum Press, New York, 1979, pp. 473-478.
Y. Tsujimoto et al., "Fabrication of Low-Loss 3dB Couplers with Multimode Optical Fibers" in Electronics Letts., vol. 14, No. 5, Mar. 1978, pp. 157-158.

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