Optical waveguides – Optical waveguide sensor
Reexamination Certificate
2011-02-01
2011-02-01
Healy, Brian M. (Department: 2883)
Optical waveguides
Optical waveguide sensor
C385S031000, C385S041000, C385S044000, C356S051000, C374S161000, C372S022000, C372S025000, C372S026000, C372S027000, C372S028000, C372S029010, C372S038020, C372S092000, C372S098000
Reexamination Certificate
active
07881566
ABSTRACT:
An improved laser source for use in a distributed temperature sensing (DTS) system (and DTS systems employing the same) includes a laser device and drive circuitry that cooperate to emit an optical pulse train at a characteristic wavelength between 1050 nm and 1090 nm. An optical amplifier, which is operably coupled to the laser device, is adapted to amplify the optical pulse train for output over the optical fiber sensor of the DTS system. In the preferred embodiment, the laser device operates at 1064 nm and outputs the optical pulse train via an optical fiber pigtail that is integral to its housing. The optical power of the optical pulse train generated by the laser source is greater than 100 mW, and preferably greater than 1 W, at a preferred pulse repetition frequency range between 1 and 50 kHz, and at a preferred pulse width range between 2 and 100 ns.
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LUMICS GMBH, “Single Frequency 1064NM Laser Module” Pamphlet.
Hartog Arthur H.
Lees Gareth P.
Wait Peter C.
Anderson Guy G
Healy Brian M.
Schlumberger Technology Corporation
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