Alphion Corporation

Chinnabbu Ekambaram

Bharat P Dave

Boris Stefanov

Tan Buu Thai

Ronald Simprini

Jithamithra Sarathy

Julio Martinez

Mohammad Laham

Roman Antosik

David Lidsky

Jiten Sarathy

Frank N Hujber

Gaurav Naik

Ravi Vora

Raj Acharya

Jayantha Das

Khem Gandhi

David Lowe

Frederick Renner

A method and apparatus for a tunable optical spectrum analyzer that can measure the optical spectrum of a demultiplexed 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 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 OP and OSNR in the same time interval.

Method and apparatus for bit-rate and format insensitive performance monitoring of lightwave signals

The present invention provides an optical signal quality selection system for optimizing the quality of information transmission. The system splits an incoming optical signal into two equal signals. The split signals are evaluated in optical performance monitors, transmitting an electrical output message to a signal selector relating to the quality of the respective signal. A second electrical message is sent from the optical performance generator to an alarm indicator signal generator, which sends an optical signal to the signal selector to drop the one of the split signals and transmit the non-dropped split signal. An unequipped optical signal from an optical idle signal generator is triggered if no active optical signal is being transmitted.

Optical signal quality selection system

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Freehold, NJ, United States of America

Chinnabbu Ekambaram