Generation of high-average-power ultrabroad-band infrared pulses

Generation of high-average-power ultrabroad-band infrared pulses

This paper summarizes the results of analytical and numerical studies on a novel technique that is capable of providing high average power ultra broadband radiation that extends from approximately 2 to 16 /spl mu/m. Such a spectrum has several potential applications, including telecommunications and...

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Bibliographic Details
Published in:IEEE journal of quantum electronics Vol. 35; no. 4; pp. 565 - 576
Main Authors: Kapetanakos, C.A., Hafizi, B., Milehberg, H.M., Sprangle, P., Hubbard, R.F., Ting, A.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01-04-1999
Institute of Electrical and Electronics Engineers
Subjects:
Broadband
Costs
Crystals
Exact sciences and technology
Frequency
Fundamental areas of phenomenology (including applications)
Gallium arsenide
Gallium arsenides
Laser beams
Modulation
Nonlinear optics
Nonlinearity
Optical mixing
Optical modulation
Optical sensors
Optics
Physics
Pulse generation
Remote sensing
Sapphire
Ultrafast processes; optical pulse generation and pulse compression
Weight reduction
Gallium arsenides
Inorganic compounds
Non linear material
Semiconductor materials
Theoretical study
Binary compounds
Numerical method
Pulse compression
Sapphire
Infrared radiation
Gas lasers
Nonlinear optics
Carbon dioxide lasers
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Description
Summary:This paper summarizes the results of analytical and numerical studies on a novel technique that is capable of providing high average power ultra broadband radiation that extends from approximately 2 to 16 /spl mu/m. Such a spectrum has several potential applications, including telecommunications and remote sensing. Additional attractive features of the new source are its anticipated compact size, light weight, ruggedness, and affordable cost. The technique is based on the interaction of a beat wave with a nonlinear medium. The beat wave is formed from the mixing of two CO/sub 2/ laser beams with closely spaced wavelengths, such as 9.5 and 9.6 /spl mu/m. The discrete ultrabroad-band spectrum is generated in a nonlinear optical medium by the self-phase modulation process, a third-order nonlinearity. The long-wavelength portion of the spectrum, i.e., from 5 to 16 /spl mu/m is produced directly from the interaction of the beat wave with a GaAs crystal. The short-wavelength portion of the spectrum is produced from the interaction of a frequency-doubled beat wave with a GaAs crystal following the chirping of the pulse by a different GaAs crystal and its subsequent optimal compression by a thin sapphire slab.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9197
1558-1713
DOI:10.1109/3.753661