Eye measurement of optical signals by optical sampling

Details Eye measurement of optical signals by optical sampling Eye measurement of optical signals by optical sampling

1997-07-15

1999-03-09

Font, Frank G.

Optics: measuring and testing

By particle light scattering

With photocell detection

356351, G01B 902

Patent

active

058808370

ABSTRACT:
A pulsed optical signal (13) of a network (23) is monitored to obtain eye measurement data as a means of obtaining an indication of signal degradation. Optical sampling of the optical signal is effected by means of an interferometer (2) in which sampling optical pulses (8) are propagated equally through arms 3 and 4 of the interferometer which include semiconducter optical amplifiers. The optical signal to be monitored is counter propagated through one arm of the interferometer, thereby setting an interference condition of the interferometer by cross modulation in one of the semiconductor optical amplifiers. The output is detected and converted to electrical signals which are processed to obtain the eye measurement data. Parameters defining the quality of the eye are extracted and processed to locate defects occurring within a network by deploying eye monitors at a number of locations. Elements of the network may be controlled using the output parameters.

REFERENCES:
patent: 4097697 (1978-06-01), Harman
patent: 4823360 (1989-04-01), Tremblay
patent: 5524144 (1996-06-01), Suzuki
IEEE Photonics Technology Letters, vol. 8. No. 9, Sep. 1996 10 GB/s Wavelength Conversion with Integrated Multiquantum -- Well-Based 3-Port Mach-Zehnder Interferometer. W. Idler et al.
22nd European Conference on Optical Communication (ECOC'96 Oslo) Eye-diagram Measurement of 100 Gbit/s Optical Signal using Optical Sampling. -- H. Takara et al.

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