Optical fiber stress detector using amplitude modulation

Details Optical fiber stress detector using amplitude modulation Optical fiber stress detector using amplitude modulation

1993-04-02

1995-01-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023119, 73800, H01J 516

Patent

active

053810058

ABSTRACT:
An optical fiber stress detector in which the light beam transmitted in the optical fiber which has to detect stresses is modulated in amplitude by a microwave alternating signal. The signal coming from the fiber is demodulated and then transmitted to a detector which measures the phase-shift existing between the demodulated signal and a signal derived from the modulation alternating signal. Application to the detection of stresses in any composite structures such as public constructive works, aircraft wings etc.

REFERENCES:
patent: 4255017 (1981-03-01), Hasegawa
patent: 4529876 (1985-07-01), Walker
patent: 4652129 (1987-03-01), Martinelli
patent: 4859843 (1989-08-01), Baney et al.
patent: 4881813 (1989-11-01), Koo et al.
patent: 4929050 (1990-05-01), Wilson
patent: 5009505 (1991-04-01), Malvern
Optics Communications, vol. 85, No. 5/6, Oct. 1, 1991, pp. 385-388, Pie-Yau Chien, et al., "An Optical Signal Generator Based on a Triangularly Phase-Modulated Interferometer".
Hernday, et al., Hewlett-Packard Journal, vol. 42, No. 1, Feb. 1991, pp. 13-22. "Design of 20-GHz Lightwave Component Analyzer".
Wong, et al., Hewlett--Packard Journal, vol. 42, No. 1, Feb. 1991, pp. 6-13. "High-Speed Lightwave Component Analysis to 20 GHz".
Measures, No. 611, Oct. 1989, pp. 37-38. "Photonetics: Le Multiplexage Temporel Pour Des Detecteurs T.O.R.".
Vifian, IEEE Instrumentation and Measurement Technology Conference, vol. 90CH, No. 2735, Feb. 1990, pp. 334-338. "Optical Measurements based on RF Modulation Techniques".
Patent Abstracts of Japan, vol. 5, No. 110, Jul. 1981. JP 56-51636.

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