Waveguide evanescent field absorption has been measured as a function of cladding refractive index and bulk absorption coefficient. A simple theory for interpreting these results has been developed. An all-fiber species concentration sensor has been constructed and its performance characterized.

1.
K.
Chan
,
H.
Ito
 and
H.
Inaba
, “
Optical fiber monitoring of gas using low-loss optical fiber link and InGaAsP light-emitting diodes in the 1.33 m region
”,
Appl. Phys. Lett.
43
,
634
(
1983
).
https://doi.org/10.1063/1.94469
Google Scholar
Crossref
Search ADS
 
2.
G.
Kychakoff
 and
R. K.
Hanson
, “Optical fiber probe using tunable laser absorption spectroscopy for combustion measurements”, in
Los Alamos Conference on Optics ’81
,
D. L.
Liebenberg
, Ed., (
SPIE
,
Bellingham, WA
,
1981
), p.
236
.
3.
G. A.
Pavlath
,
E. L.
Moore
 and
M. C.
Suman
, “Applications of all-fiber technology to sensors”, in
Fiber Optics and Laser Sansors
,
E.L.
Moore
 and
O.G.
Ramer
 Eds., (
SPIE
,
Bellingham, WA
,
1983
), pp.
70
–
79
.
Google Scholar
Crossref
Search ADS
 
4.
G. J.
Muller
, “Spectroscopy with the evanescent wave in the visible region of the spectrum”, in
Multichannel Image Detectors
,
J.
Talmi
 Ed., (
American Chemical Society
,
New York
,
1979
), pp.
241
.
Google Scholar
 
5.
D. R.
Battiste
,
S. E.
Fry
,
T.
White
,
M. W.
Scoggins
 and
T. B.
Mc
Willams, “
Determination of ethanol in gasohol by infrared spectroscopy
”,
Anal. Chem.
53
,
1096
(
1981
). pp.
239
.
https://doi.org/10.1021/ac00230a039
Google Scholar
Crossref
Search ADS
 
6.
S.
Simhony
,
E. M.
Kosower
 and
A.
Katzir
, “
Novel attenuated total reflectance spectroscopic cell using infrared fibers for aqueous solutions
”,
Appl. Phys. Lett.
49
,
253
(
1986
).
https://doi.org/10.1063/1.97186
Google Scholar
Crossref
Search ADS
 
7.
H.
Tanaka
,
T.
Ueki
 and
H.
Tai
, “Fiber-optic evanescent wave gas spectroscopy”, in
Technical Digest, Optical Fiber Communications/Optical Fiber Sensors
, (
Optical Society of America
,
Washington, DC
,
1985
), paper
PDS2-1
.
Google Scholar
 
8.
A. W.
Snyder
 and
J. D.
Love
,
Optical Waveguide Theory
, (
Chapman and Hall
,
New York
,
1983
).
Google Scholar
 
9.
A. W.
Snyder
, “
Asymptotic expressions for eigenfunctions and eigenvalues of a dielectric of optical waveguide
”,
IEEE Trans. Microwave Theory and Techniques MTT-17
,
1130
(
1969
).
Google Scholar
 
10.
D.
Gloge
, “
Weakly guiding fibers
”,
Appl. Opt.
10
,
2252
(
1971
).
https://doi.org/10.1364/AO.10.002252
Google Scholar
Crossref
Search ADS
PubMed
 
11.
G. M.
Hale
 and
M. R.
Querry
, “
Optical constants of water in the 200 nm to 200 μm wavelength region
”,
Appl. Opt.
12
,
555
(
1973
).
https://doi.org/10.1364/AO.12.000555
Google Scholar
Crossref
Search ADS
PubMed
 
12.
M.
Millard
, “Synthesis of organic polymer films in plasmas”, in
Techniques and Application of Plasma Chemistry
,
J.R.
Hollahan
 and
A.T.
Bell
, Eds., (
Wiley
,
New York
,
1974
), pp.
177
.
Google Scholar
 
13.
G.
Kychakoff
,
P. H.
Paul
 and
T. B.
Robey
, “Optical devices using plasma-polymerized organic materials”, in
Technical Digest, Conference on Lasers and Electro-Optics
, (
Optical Society of America
,
Washington, DC
,
1985
), paper
ThM53
.
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1987
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