Broadly tunable picosecond IR source
Patent 4349907 Issued on September 14, 1982. Estimated Expiration Date: 
April 23, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 23, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3735280 3774121 Continuously tunable wideband coherent infrared source Patent #: 4200808 InventorsAssigneeApplicationNo. 06/143059 filed on 04/23/1980US Classes:372/92, PARTICULAR RESONANT CAVITY359/330, Parametric oscillator372/102, Grating372/21, Nonlinear device372/94Having a ring configurationExaminersPrimary: Sikes, William L.Assistant: Scott, Leon Jr. Attorney, Agent or FirmInternational ClassesG02F 1/35 (20060101)G02F 1/39 (20060101) AbstractA picosecond traveling-wave parametric device capable of controlled spectral bandwidth and wavelength in the infrared is reported. Intense 1.064 μm picosecond pulses (1) pass through a 4.5 cm long LiNbO3 optical parametric oscillator crystal (2) set at its degeneracy angle. A broad band emerges, and a simple grating (3) and mirror (4) arrangement is used to inject a selected narrow-band into a 2 cm long LiNbO3 optical parametric amplifier crystal (5) along a second pump line. Typical input energies at 1.064 μm along both pump lines are 6-8 mJ for the oscillator and 10 mJ for the amplifier. This yields 1 mJ of tunable output in the range 1.98 to 2.38 μm which when down-converted in a 1 cm long CdSe crystal mixer (6) gives 2 μJ of tunable radiation over the 14.8 to 18.5 μm region. The bandwidth and wavelength of both the 2 and 16 μm radiation output are controlled solely by the diffraction grating.Other References
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