Optical performance monitoring device
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United States of America Patent
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Dec 28, 2004
Grant Date -
Jul 3, 2003
app pub date -
Dec 6, 2002
filing date -
Dec 7, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
Optical performance monitoring device for monitoring and analyzing an optical signal has a periodically movable reflective mirror to receive an input optical beam and to cyclically 'scan' (deflect) the beam in a one-dimensional direction. The deflected beam at a varying deflection angle is directed to a linear variable filter (LVF) that passes a selected wavelength channel of the deflected beam in dependence upon the deflection angle. The selected channel is then passed to a photodetector via a focusing lens, typically a cylindrical lens. The device is durable, tunable, offers low loss, good wavelength registrability and spectral resolution.
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