An integrated optical temperature sensor requiring no electrical connection and consisting of a parallel array of unequal-arm-length waveguide interferometers in LiNbO3 has been designed and the key components have been demonstrated. The optical transmission of each interferometer varies sinusoidally with temperature with a period inversely proportional to the path length difference between the two arms. This device has a projected range and resolution of >700°C and 2 × 10−3°C respectively and would be particularly useful in applications requiring immunity to electrical noise.
REFERENCES
1.
K. A.
Wickersheim
and R. B.
Alves
, Ind. Res. Dev.
(December 1979
), p. 82
.2.
K.
Kyuma
, S.
Tai
, T.
Matsui
, T.
Sawada
, and M.
Nunoshita
, in Proceedings Conference on Lasers and Electro-optics
, Washington
, 1981
(IEEE
, New York
, 1981
), p. 102
.3.
W. E.
Martin
, Appl. Phys. Lett.
26
, 562
(1975
).4.
H. F.
Taylor
, Appl. Optics
13
, 642
(1974
).5.
H. F.
Taylor
, Appl. Optics
, 16
, 711
(1977
).6.
L. M.
Johnson
and F. J.
Leonberger
, in Technical Digest Third International Conference on Integrated Optics and Optical Fiber Communications
, San Francisco
, 1981
(Optical Society of America
, Washington
, 1981
) p. 82
L. M.
Johnson
, Ph.D. Thesis (MIT
, Cambridge, Mass.
, 1981
) (unpublished).7.
L. M.
Johnson
and F. J.
Leonberger
, accepted for publication by Opt. Lett.
8.
H.
Iwasaki
, H.
Toyoda
, N.
Niizeki
and H.
Jubota
, Jap. J. Appl. Phys.
6
, 1101
(1967
).9.
Y. S.
Kim
and R. T.
Smith
, J. Appl. Phys.
40
, 4637
(1969
).
This content is only available via PDF.
© 1982 Laser Institute of America.
1982
Laser Institute of America
You do not currently have access to this content.