Subcarrier-multiplexed optical transmission systems using optica

Details Subcarrier-multiplexed optical transmission systems using optica Subcarrier-multiplexed optical transmission systems using optica

1995-11-27

1997-05-06

Chin, Wellington

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359122, H04J 1402

Patent

active

056276680

ABSTRACT:
An optical amplifier is used as a frequency-selective high-gain element in a subcarrier-multiplexed fiber optic transmission system. A high-speed diode laser optical transmitter is modulated by a plurality of independent information channels that are carried on separate, appropriately spaced carrier frequencies. An optical receiver, coupled to the transmitter by way of an optical fiber, includes a narrow-bandpass semiconductor laser optical amplifier having a gain bandwidth smaller than wavelength distances between adjacent ones of the carrier frequencies, a photodetector coupled to the output of the amplifier, and polarization controlling means coupled to the fiber in front of the optical amplifier for maximizing gain in the optical amplifier.

REFERENCES:
patent: 4228349 (1980-10-01), Ettenberg et al.
patent: 4359776 (1982-11-01), Acket et al.
patent: 4592043 (1986-05-01), Williams
patent: 4722081 (1988-01-01), Fujito et al.
patent: 5537634 (1996-07-01), Fye

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