Broadly tunable picosecond IR source
- Nesconset, NY
- Los Alamos, NM
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.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM
- DOE Contract Number:
- W-7405-ENG-36
- Assignee:
- United Stated of America as represented by Department of Energy (Washington, DC)
- Patent Number(s):
- US 4349907
- OSTI ID:
- 864339
- Country of Publication:
- United States
- Language:
- English
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064
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14
16
18
38
6-8
98
amplifier
angle
arrangement
band
bandwidth
broad
broad band
broadly
broadly tunable
capable
cdse
cm
controlled
controlled spectral
crystal
degeneracy
device
device capable
diffraction
diffraction grating
down-converted
emerges
energies
grating
infrared
inject
input
intense
linbo
line
lines
mirror
mixer
mj
narrow-band
optical
optical parametric
oscillator
output
parametric
parametric amplifier
parametric oscillator
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picosecond
picosecond pulses
pulses
pump
radiation
range
region
reported
selected
set
simple
solely
source
spectral
spectral bandwidth
traveling-wave
tunable
typical
wavelength
yields