摘要 |
A method and apparatus (410, 420, 430, 450, 475), for a tunable optical spectrum analyzer that can measure the optical spectrum of a demultiplexed Dense Wave Division Multiplexing (DWDM) signal are presented. The signal level and Optical Signal to Noise Ratio (OSNR) of an individual channel of the DWDM signal can be obtained from the measured optical spectrum. The device (101, 102, 104, 105, 106, 108, 109, 120, 130) employs a rapid tuning and detection technique to obtain the optical spectrum of the incoming signal. In a preferred embodiment the apparatus is fabricated on a single chip resulting in a compact measurement device. Using the device of the preferred embodiment, single channel OSNR can be determined in as small a time interval as approximately 225 microseconds. Using an array of these devices an entire DWDM mixed signal can be monitored as to Optical Power and OSNR in the same time interval. |
申请人 |
ALPHION CORPORATION |
发明人 |
SARATHY, JITHAMITHRA;EKAMBARAM, CHINNABBU;LIDSKY, DAVID, B.;DAVE, BHARAT;STEFANOV, BORIS;THAI, TAN;SIMPRINI, RONALD;MARTINEZ, JULIO;NAIK, GAURAV |