Abstract

A fiber-optic thermometer based on temperature dependent absorption in Nd³⁺ doped glass is demonstrated over the 298–573 K range. A broadband detection technique allows the use of the complete spectrum of a pulse modulated light emitting diode (LED). A fiber-optic recirculating loop is employed to construct a reference channel in the time domain by generating a train of pulses from one initial pulse. A theoretical model is developed, and experimental data are shown to compare well with the theory. Possible sources of error and instability are identified, and ways to enhance the performance of the system are proposed.

© 1986 Optical Society of America

Thermochromic transducer optical fiber thermometer

Mauro Bacci, Massimo Brenci, Giuliano Conforti, Riccardo Falciai, Anna Grazia Mignani, and Anna Maria Scheggi
Appl. Opt. 25(7) 1079-1082 (1986)

Rayleigh backscattering in optical fiber recirculating delay lines

Moshe Nazarathy and S. A. Newton
Appl. Opt. 25(7) 1051-1055 (1986)

Optical temperature sensor using Eu³⁺-doped fluoride glass

Y. Ohishi and S. Takahashi
Appl. Opt. 25(5) 720-723 (1986)

Fiber-optic interferometer using frequency-modulated laser diodes

Glenn Beheim
Appl. Opt. 25(19) 3469-3472 (1986)

1200°C high-temperature distributed optical fiber sensing using Brillouin optical time domain analysis

Pengbai Xu, Yongkang Dong, Dengwang Zhou, Cheng Fu, Juwang Zhang, Hongying Zhang, Zhiwei Lu, Liang Chen, and Xiaoyi Bao
Appl. Opt. 55(21) 5471-5478 (2016)