Back to results
US 7,254,325 B2Granted
Method and system for optical performance monitoring
AssigneeFujitsu Limited
InventorTakeshi Hoshida
Life of this patent
Estimating the term…
Abstract
In accordance with one embodiment of the present invention, a system for monitoring a performance characteristic of an intensity modulated phase shift keying optical signal includes a splitter, a first detector, and a second detector. The splitter is operable to receive an intensity modulated phase shift keying optical signal from an optical network and route at least a portion of the signal to the first detector. The first detector generates an electrical signal based on the received optical signal without demodulating the optical signal. The second detector measures a performance characteristic of the intensity modulated phase shift keying optical signal based on a signal indicative of the filtered signal.
Claims30
A system for monitoring a performance characteristic of an intensity modulated phase shift keying optical signal, comprising:
- a splitter, operable to receive an intensity modulated phase shift keying optical signal from an optical network and route at least a portion of the signal to a first detector;
- the first detector, coupled to the splitter and operable to receive, the portion of the optical signal and generate an electrical signal based on the received optical signal without demodulation;
- a second detector, operable to receive a signal indicative of the electrical signal, measure a first performance characteristic of the intensity modulated phase shift keying optical signal based on the signal indicative of the electrical signal, and generate a first performance signal based on the first performance characteristic;
- a third detector, coupled to the first detector and operable to receive a second electrical signal from the first detector, measure a second performance characteristic of the intensity modulated phase shift keying optical signal based on the second electrical signal and generate a second performance signal based on the second performance characteristic;
- and
- a divider, coupled to the second detector and the third detector and operable to receive the first and second performance signals and to measure a third performance characteristic of the intensity modulated phase shift keying optical signal based on the first and second performance signals.
3 more elements
A system for monitoring a performance characteristic of an intensity modulated phase shift keying optical signal, comprising:
- a splitter, operable to receive an intensity modulated phase shift keying optical signal from an optical network and route at least a portion of the signal to a first detector;
- a first filter, coupled to the splitter and operable to receive an optical signal and generate a filtered optical signal based on the received optical signal;
- a first detector, coupled to the first filter and operable to receive an optical signal and generate an electrical signal based on the received optical signal without demodulation;
- a second filter, coupled to the first detector and operable to receive the electrical signal from the first detector and to generate a filtered electrical signal;
- a second detector, coupled to the second filter and operable to receive the filtered electrical signal, measure a first performance characteristic of the intensity modulated phase shift keying optical signal based on the filtered electrical signal and generate a first performance signal based on the first performance characteristic;
- a third detector, coupled to the first detector and operable to receive the electrical signal from the first detector, measure a second performance characteristic of the intensity modulated phase shift keying optical signal based on the electrical signal and generate a second performance signal based on the second performance characteristic;
- and
- a divider, coupled to the second detector and the third detector and operable to receive the first and second performance signals and to measure a third performance characteristic of the intensity modulated phase shift keying optical signal based on the first and second performance signals.
5 more elements
A method for monitoring the performance of an optical communication system, comprising:
- tapping an intensity modulated phase shift keying optical signal;
- generating a first electrical signal and a second electrical signal based on the tapped optical signal without demodulation of the optical signal;
- measuring a first performance characteristic of the intensity modulated phase shift keying optical signal based on a signal indicative of the generated first electrical signal generating a first performance signal based on the first performance characteristic;
- measuring a second performance characteristic of the intensity modulated phase shift keying optical signal based on the second electrical signal;
- generating a second performance signal based on the second performance characteristic;
- and
- receiving, by a divider, the first and second performance signals and measuring, by the divider, a third performance characteristic of the intensity modulated phase shift keying optical signal based on the first and second performance signals.
4 more elements
A method for monitoring the performance characteristic of an optical communication system comprising:
- tapping an intensity modulated phase shift keying optical signal from an optical network;
- filtering the tapped optical signal to produce a filtered optical signal;
- generating an electrical signal based on the filtered optical signal;
- filtering the generated electrical signal to produce a filtered electrical signal;
- measuring a first performance characteristic of the intensity modulated phase shift keying optical signal based on the filtered electrical signal and generating a first performance signal based on the measured first performance characteristic;
- measuring a second performance characteristic of the intensity modulated phase shift keying optical signal based on the generated electrical signal and generating a second performance signal based on the measured second performance characteristic;
- and
- measuring a third performance characteristic of the intensity modulated phase shift keying optical signal based on the first and second performance signals.
5 more elements
Dependencies are inferred from the claim text.