Optical performance monitors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 14, 2003
Grant Date -
N/A
app pub date -
Jun 26, 2002
filing date -
Oct 9, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for wavelength control and measurement are disclosed. An optical signal to be measured is tapped off a portion thereof referring to as a source signal. Together with a reference signal, the source signal is coupled to a tunable filter. The frequency response or passing band of the tunable filter is so controlled that one wavelength .lambda..sub.x from the source signal and one wavelength .lambda..sub.rx from the reference signal transmit through. Relying on a band separation filter, the wavelength .lambda..sub.rx is separated from the reference signal and coupled to a gas cell of a known spectrum, a filtered signal of the wavelength .lambda..sub.rx is then coupled to a photo-detector for subsequent electrical measurement. In accordance with the known spectrum, the wavelength .lambda..sub.x can be precisely derived.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully