Optical wavelength-division multiplex transmission system with a

Details Optical wavelength-division multiplex transmission system with a Optical wavelength-division multiplex transmission system with a

1989-07-21

1990-07-31

Orsino, Joseph A.

Multiplex communications

Wide area network

Packet switching

356352, 455617, H04J 1402

Patent

active

049455311

ABSTRACT:
An optical wavelength-division multiplex transmission system having an optical filter (100) for filtering spontaneous emission noise from an optically multiplexed signal which has been amplified by an optical amplifier (622), which can be a laser amplifier or a fiber Raman amplifier. The output signal from the optical filter may be further amplified by a second optical amplifier (624), and the second amplified signal may be sent to a further optical filter. The optical filter includes an optical demultiplexer and an optical multiplexer, and can be a Fabry-Perot interferometer or a Mach-Zehnder interferometer. The optical filter is for transmitting pass-bands with center wavelengths corresponding to those of the wavelengths of the optical signals to be transmitted by the optical wavelength-division wavelength multiplex transmission system.

REFERENCES:
patent: 4076422 (1978-02-01), Kohno
patent: 4406003 (1983-09-01), Eberly
patent: 4508964 (1985-04-01), Gunning, III et al.
patent: 4807227 (1989-02-01), Fujiwara
Simon, J. C., "Semiconductor Laser Amplifier for Single Mode Optical Fiber Communications", Journal of Optical Communications 4 (1983), 51-62.
Hegarty et al., "Low-Loss Single-Wavelength-Division Multiplexing with Etched Fibre Arrays", ELECTRONICS LETTERS, Aug. 16, 1984, vol. 20, No. 17, pp. 685-686.

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