Optical-signal transmitting apparatus, optical-signal receiving

Details Optical-signal transmitting apparatus, optical-signal receiving Optical-signal transmitting apparatus, optical-signal receiving

1996-03-26

1999-06-29

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359127, 250574, H04B 1000

Patent

active

059176342

ABSTRACT:
An optical-signal transmitting apparatus performs predetermined digital modulation on a digital signal to be transmitted. The modulated digital signal is then converted into a light signal which is output. The output light signal is scattered and radiated to external space. The wavelength of the radiated light is preferably between 1.4 and 1.6 microns. Modulation is preferably performed based on a duration of a symbol to obtain not less than a predetermined ratio, e.g., 3, of a carrier wave to an interference wave. The scattered light signal is received and is preferably converged by a hemispherical lens mounted to a light receiving device. The received light signal is converted to an electrical signal and digital demodulation is performed.

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