Optical transmission system with transmission characteristic mea

Details Optical transmission system with transmission characteristic mea Optical transmission system with transmission characteristic mea

1997-01-03

1998-09-29

Negash, Kinfe-Michael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359161, 359179, H04B 1008, H04B 1000

Patent

active

058152946

ABSTRACT:
The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible. A transmission characteristic is measured in a transmission characteristic measuring section, and control of signal light wavelength in a tunable light source, control of the amount of prechirping, control of the amount of dispersion compensation, and/or control of optical power are performed to achieve the best transmission characteristic. Wavelength dispersion is deliberately introduced by a dispersion compensator, to reduce nonlinear effects. A tunable laser is used to optimize signal light wavelength for each optical amplification repeater section. Peripheral techniques, such as drift compensation, clock extraction, optical signal channel identification, clock phase stabilization, etc., are provided for the implementation of optical multiplexing.

REFERENCES:
patent: 5218662 (1993-06-01), Dugan
patent: 5224183 (1993-06-01), Dugan
patent: 5355240 (1994-10-01), Prigent et al.
patent: 5365362 (1994-11-01), Gnauck et al.
patent: 5400164 (1995-03-01), Kurtzke et al.
patent: 5539563 (1996-07-01), Park

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