Optical waveguides – Optical waveguide sensor
Patent
1994-01-05
1995-07-04
Lee, John D.
Optical waveguides
Optical waveguide sensor
385 13, 32420713, 25022719, 25022727, 505845, 505847, G02B 610, G01R 33035
Patent
active
054308143
ABSTRACT:
A fiber optic system detects temperature transients in a superconducting magnet. A signal optical fiber is placed in function proximity with the superconducting magnet for responding to a temperature transient condition and a reference optical fiber is remote from the signal optical fiber. A coherent light outputs coherent light for input to the signal and reference optical fiber to provide a phase shift of about 90.degree. to the coherent light in the signal or reference optical fiber. In one embodiment, a low pass filter provides feed back to the phase modulator to stabilize the modulation while a high pass filter passes temperature transient signals to a suitable analyzer, such as a digital storage oscilloscope, or the like.
REFERENCES:
patent: 4671113 (1987-06-01), Carome
patent: 4675522 (1987-06-01), Arunkumar
patent: 5198761 (1993-03-01), Hashimoto et al.
O. Tsukamoto et al., "Detection of Temperature Rise at 4.2K by Using Dual-Core Optical Fiber--An Optical Method to Detect a Quench of a Superconducting Magnet," 31 Adv. Cryo. Eng., Plenum House, N.Y. (1986).
Krohn, Fiber Optic Sensors, Fundamentals and Applications, Ch. 4, "Phase-Modulated Sensors," Instrument Society of America, Research Triangle Park, N.C. (1988).
McCall Gene H.
Pappas Daniel S.
York George W.
Advec Corporation
Lee John D.
Sanghavi Hemang
Wilson Ray G.
LandOfFree
Temperature transient detection system for superconducting magne does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature transient detection system for superconducting magne, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature transient detection system for superconducting magne will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-766797