Multiplex communications – Wide area network – Packet switching
Patent
1979-09-11
1982-01-26
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370108, 367 79, H04J 302
Patent
active
043131921
ABSTRACT:
An array of optical waveguide transducers, especially suitable for use in a multi-channel hydrophone seismic streamer, contains optical waveguides which are deformed in response to the parameter being sensed (underwater acoustic energy in the case of the seismic streamer). Two optical signals are obtained from each transducer, amplitude modulated in opposite polarity in accordance with the parameter and returned to a collection point by way of optical signal highways, such as optical fiber waveguides. The optical signals are time division multiplexed on the return highways by successively providing light pulses to each of the transducers upon activation of separate light sources associated therewith which are electrically activated by electrical signals propagated along a transmission line wherein the electrical signals are successively delayed. The optical signals on the return waveguides appear in time slots corresponding to the successive delays and may be sequentially interrogated at a rate compatible with the frequency response of the array system. At the collection point, the outputs of the return waveguides are subtracted thereby summing the optical signals from each transducer, while reducing noise introduced into the system as may be due both to variations in the amplitude of the light from the sources and mechanically due to deformation or bending of the optical waveguides other than in response to the parameter being sensed.
REFERENCES:
patent: 3851302 (1974-11-01), Schmitt
patent: 3911226 (1975-10-01), Angelle et al.
patent: 3990036 (1976-11-01), Savit
patent: 3996553 (1976-12-01), Siems et al.
patent: 4005273 (1977-01-01), Siems
patent: 4089584 (1978-05-01), Polczynski
patent: 4117448 (1978-09-01), Siems
"A 500-Channel Streamer System", by Savit et al., 1977, Offshore Technology Conf.
Bouyoucos John V.
Nelson David E.
Hydroacoustics Inc.
Lukacher Martin
Olms Douglas W.
LandOfFree
Optical transducer array system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical transducer array system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical transducer array system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1669364