Multi-pass etalon filter
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United States of America Patent
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Sep 9, 1997
Grant Date -
N/A
app pub date -
Feb 26, 1996
filing date -
Feb 26, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-pass Fabry-Perot etalon, or bandpass, filter, has a Fabry-Perot cavity defined by two partially reflective mirrors with a gap therebetween and a third reflecting mirror positioned adjacent said two mirrors and arranged to reflect substantially any light eliting said cavity back into it. The filter can replace two single-pass Fabry-Perot etalon filters and can provide lower signal loss and simpler wavelength control.
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