Abstract

A small glass capillary tube was fitted with a light-emitting diode and a phototransistor detector to form a multiple-reflecting optical waveguide device. When the capillary was coated with a thin solid film composed of an oxazine perchlorate dye, the device was demonstrated to be capable of reversibly sensing ammonia vapors. Ammonia-vapor concentrations from 1000 parts in 10⁶ (ppm) to less than 60 ppm were easily and reproducibly detected. A preliminary qualitative kinetic model is proposed to describe the vapor–film interaction.

© 1983 Optical Society of America

Porous optical fibers for high-sensitivity ammonia-vapor sensors

M. R. Shahriari, Q. Zhou, and G. H. Sigel
Opt. Lett. 13(5) 407-409 (1988)

Fabrication and calibration of Oxazine-based optic fiber sensor for detection of ammonia in water

Ahmed Hasnain Jalal, Jinsong Yu, and A. G. Agwu Nnanna
Appl. Opt. 51(17) 3768-3775 (2012)

Composite optical waveguide composed of a tapered film of bromothymol blue evaporated onto a potassium ion–exchanged waveguide and its application as a guided wave absorption–based ammonia-gas sensor

Zhi-mei Qi, Abliz Yimit, Kiminori Itoh, Masayuki Murabayashi, Naoki Matsuda, Akiko Takatsu, and Kenji Kato
Opt. Lett. 26(9) 629-631 (2001)

Diffractive optic sensor for remote-point detection of ammonia

M. Vasileiadis, L. Athanasekos, A. Meristoudi, D. Alexandropoulos, G. Mousdis, V. Karoutsos, A. Botsialas, and N. A. Vainos
Opt. Lett. 35(9) 1476-1478 (2010)

Porous plastic optical fiber sensor for ammonia measurement

Quan Zhou, David Kritz, Laura Bonnell, and George H. Sigel
Appl. Opt. 28(11) 2022-2025 (1989)