Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-11-26
1999-10-12
Pascal, Leslie
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359161, 359179, H04B 1018
Patent
active
059662280
ABSTRACT:
An optical transmission system comprises transmission optical fibers 14 connected between an optical transmission terminal 10 and an optical receiving terminal 12 via optical amplifying repeaters 16, and equalizing fiber 18 each connected in each equalizing interval. The equalizing fiber 18 is typically located at the terminal end of each equalizing interval. Each transmission optical fiber 14 is a dispersion-shifted fiber whose wavelength dispersion is substantially zero in a specific band, for example, 1.5 .mu.m. The optical amplifying repeaters 16 include an optical amplifier, and a dispersion compensating optical element having wavelength dispersion characteristics that exhibit an inclination opposite from that of wavelength characteristics of wavelength dispersion of the transmission optical fiber 14 (more specifically, a minus inclination with respect to the wavelength). The dispersion compensating optical element compensates offset values of cumulative wavelength dispersion among different wavelengths. The dispersion compensating optical element can be made by a fiber grating technology.
REFERENCES:
patent: 5606445 (1997-02-01), Kikuchi et al.
patent: 5701188 (1997-12-01), Shigematsu et al.
patent: 5754322 (1998-05-01), Ishikawa et al.
Akiba Shigeyuki
Edagawa Noboru
Suzuki Masatoshi
Taga Hidenori
Yamamoto Shu
Kokusai Denshin Denwa Kabushiki Kaisha
Pascal Leslie
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