Photonic signal frequency up and down-conversion using a photonic band gap structure
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United States of America Patent
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-
Jun 1, 2004
Grant Date -
Oct 11, 2001
app pub date -
Dec 22, 2000
filing date -
Apr 2, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A photonic band gap (PBG) device is provided for frequency up and/or down-converting first and second photonic signals incident on the device to produce a down-converted output photonic signal. When the first and second incident photonic signals have respective first and second frequencies .omega..sub.3 and .omega..sub.2, the down-converted photonic signal has a third frequency .omega..sub.1 =.omega..sub.3 -.omega..sub.2. When the first incident field has a frequency .omega..sub.1, the first up-converted photonic signal has a second frequency .omega..sub.2. The second up-converted photonic signal has a third frequency .omega..sub.3 =.omega..sub.1 +.omega..sub.2. Thus, the PBG device can be used to generate coherent near- and mid-IR signals by frequency down-converting photonic signals from readily available photonic signal sources, or red, blue, and ultraviolet signals by up-converting the same readily available photonic signal sources.
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