Optical: systems and elements – Optical frequency converter
Reexamination Certificate
2006-04-24
2008-09-16
Pak, Sung (Department: 2874)
Optical: systems and elements
Optical frequency converter
C385S122000
Reexamination Certificate
active
07426075
ABSTRACT:
In a nonlinear optical medium such as the gallium arsenide, two collinear incident monochromatic waves are injected to generate a monochromatic wave. The medium induces between the three waves a propagation phase-shift that has a value π if the three waves travel a coherence length in the medium and that is compensated at the value 0 modulo 2π each time that the three waves have travelled a periodic distance in the medium. In order to significantly increase the conversion efficiency, the periodic distance between two successive bounces of total internal reflection of the waves in zig-zag is strictly less than the coherence length. The high conversion efficiency on a very short material length leads to product high-power coherent optical sources particularly with wavelengths of approximately 10 μm.
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Haïdar Riad
Primot Jéröme
Rosencher Emmanuel
Lowe Hauptman & Ham & Berner, LLP
ONERA
Pak Sung
Petkovsek Daniel
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