Pulse quaternary communication means

Details Pulse quaternary communication means Pulse quaternary communication means

1973-06-14

1976-05-11

Safourek, Benedict V.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350159, H04b 900

Patent

active

039566269

ABSTRACT:
A pulse quaternary modulator especially to enable laser communication systems when working at high data rates to be able to operate on less laser power and on a modulation format that improves modulation efficiency. The subject modulation means can be used in transmitters and receivers and include means that make use of polarization changes in the modulator to create selective high speed electronically controlled optical time delays, and it also includes means for using a combination of polarization state and pulse position information to represent information choices. The subject means are also able to achieve M-ARY modulation when using as a source a mode-lock laser which produces output laser pulses.

REFERENCES:
patent: 3430048 (1969-02-01), Rubinstein
patent: 3440424 (1969-04-01), Buhrer
patent: 3532890 (1970-10-01), Denton
patent: 3705986 (1972-12-01), Sanders et al.

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