Generation of pulses of electromagnetic radiation by use of the

Details Generation of pulses of electromagnetic radiation by use of the Generation of pulses of electromagnetic radiation by use of the

1984-04-23

1986-12-30

Orsino, Jr., Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

455610, H04B 900

Patent

active

046335242

ABSTRACT:
Pulses of electromagnetic radiation having predetermined spacing between pulses can be generated by coupling amplitude modulated carrier radiation into an appropriate nonlinear transmission medium that has anomalous dispersion in some spectral region. The amplitude modulation is to be such that the amplitude has peaks with the predetermined spacing, and the carrier wavelength is to be in the anomalous dispersion region of the medium. Interaction between the medium and the radiation then results in contraction of the width of the amplitude peaks, which can result in formation of narrow pulses. A preferred transmission medium is monomode fiberguide, e.g., silica-based single mode optical fiber. In addition to the method for producing a sequence of pulses, a communication system using the inventive method is disclosed. Furthermore, a communication system comprising Raman amplification of the signal is disclosed.

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