Coherent light generators – Particular resonant cavity
Patent
1980-04-23
1982-09-14
Sikes, William L.
Coherent light generators
Particular resonant cavity
372 94, 372 21, 372102, 307425, H01S 300
Patent
active
043499074
ABSTRACT:
A picosecond traveling-wave parametric device capable of controlled spectral bandwidth and wavelength in the infrared is reported. Intense 1.064 .mu.m picosecond pulses (1) pass through a 4.5 cm long LiNbO.sub.3 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 LiNbO.sub.3 optical parametric amplifier crystal (5) along a second pump line. Typical input energies at 1.064 .mu.m 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 .mu.m which when down-converted in a 1 cm long CdSe crystal mixer (6) gives 2 .mu.J of tunable radiation over the 14.8 to 18.5 .mu.m region. The bandwidth and wavelength of both the 2 and 16 .mu.m radiation output are controlled solely by the diffraction grating.
REFERENCES:
patent: 3735280 (1977-05-01), Johnston, Jr.
patent: 3774121 (1973-11-01), Ashkin et al.
patent: 4200808 (1980-04-01), Herbst
"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.
Campillo Anthony J.
Hyer Ronald C.
Shapiro Stanley J.
Besha Richard G.
Denny James E.
Gaetjens Paul D.
Jr. Leon Scott
Sikes William L.
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