U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Broadly tunable picosecond IR source

Patent 4349907 Issued on September 14, 1982. Estimated Expiration Date: Icon_subject 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
Issued on: 04/29/1980
Inventor: Herbst

Inventors

Assignee

Application

No. 06/143059 filed on 04/23/1980

US Classes:

372/92, PARTICULAR RESONANT CAVITY359/330, Parametric oscillator372/102, Grating372/21, Nonlinear device372/94Having a ring configuration

Examiners

Primary: Sikes, William L.
Assistant: Scott, Leon Jr.

Attorney, Agent or Firm

International Classes

G02F 1/35 (20060101)
G02F 1/39 (20060101)

Abstract

A 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

  • "Intense Tunable Picosecond Pulses in the Infrared" Lauberbeau et al. App. hys. Lett., vol. 25, No. 1, Jul. 74
  • "Broadly Tunable Repetitive, Picosecond Parametric Oscillator" Tanaka et al., Opt. Comm. vol. 25, No. 2, May 1978
  • "Tunable Infrared Ultrashort Pulses from a Mode-Locked Parametric Oscillator", Weisman, Opt. Comm. vol. 19, No. 1, Oct. 1976
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