Coherent light generators – Particular beam control device – Q-switch
Patent
1994-05-11
1996-01-09
Bovernick, Rodney B.
Coherent light generators
Particular beam control device
Q-switch
372 22, 356318, H01S 311
Patent
active
054835461
ABSTRACT:
A sensing system for high sensitivity spectroscopic measurements is described. An optically pumped passively Q-switched laser emits laser light of a first frequency at a sensing site. Frequency-converting crystals coupled to the laser convert the laser output to light of a second frequency which illuminates the sensing site and produces a return radiation that is characteristic of the material at the site. A pump source coupled to the laser by an optical fiber pumps the laser with light of a third frequency that is efficiently propagated over the fiber. A sensor senses the radiation returning from the sensing site. The sensor is either an optical detector located at the site or an optical fiber having one end located at the site and the other end coupled to a remote optical detector.
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Johnson Bernadette
Zayhowski John J.
Bovernick Rodney B.
Massachusetts Institute of Technology
Wise Robert E.
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