Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1997-01-08
1999-06-01
Negash, Kinfe-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359127, 359181, 359123, H04B 1000
Patent
active
059092971
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.
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patent: 5491576 (1996-02-01), Bergano
patent: 5539563 (1996-07-01), Park
Ishikawa George
Nishimoto Hiroshi
Ooi Hiroki
Sekiya Motoyoshi
Tomofuji Hiroaki
Fujitsu Limited
Negash Kinfe-Michael
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