Coherent light generators – Optical fiber laser
Reexamination Certificate
2006-07-10
2009-11-17
Nguyen, Dung T (Department: 2828)
Coherent light generators
Optical fiber laser
C372S069000
Reexamination Certificate
active
07620077
ABSTRACT:
An optical parametric oscillator (OPO) is described that efficiently converts a near-infrared laser beam to tunable mid-infrared wavelength output. In some embodiments, the OPO includes an optical resonator containing a nonlinear crystal, such as periodically-poled lithium niobate. The OPO is pumped by a continuous-wave fiber-laser source having a low-power oscillator and a high-power amplifier, or using just a power oscillator). The fiber oscillator produces a single-frequency output defined by a distributed-feedback (DFB) structure of the fiber. The DFB-fiber-laser output is amplified to a pump level consistent with exceeding an oscillation threshold in the OPO in which only one of two generated waves (“signal” and “idler”) is resonant within the optical cavity. This pump source provides the capability to tune the DFB fiber laser by straining the fiber (using an attached piezoelectric element or by other means) that allows the OPO to be continuously tuned over substantial ranges, enabling rapid, wide continuous tuning of the OPO output frequency or frequencies.
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Lowenthal, Dennis D., “CW peri
Lemaire Charles A.
Lemaire Patent Law Firm, P.L.L.C.
Lockheed Martin Corporation
Nguyen Dung T
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