Optical waveguides – With optical coupler – Plural
Patent
1998-01-21
1999-11-23
Lee, John D.
Optical waveguides
With optical coupler
Plural
359189, H04B 106
Patent
active
059914777
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 technique, 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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Ishikawa George
Nishimoto Hiroshi
Ooi Hiroki
Sekiya Motoyoshi
Tomofuji Hiroaki
Fujitsu Limited
Kang Juliana K.
Lee John D.
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