Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1989-09-20
1991-06-11
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455616, 455617, 455619, 455612, 370 2, H01S 300, H04B 1000
Patent
active
050239490
ABSTRACT:
An apparatus for generating an FSK-modulated optical signal has an optical two-filter FSK super-heterodyne receiver. The optical signal has two different polarization conditions that are orthogonal to one another. Due to the two-filter receiver and orthogonal conditions, polarization-independent reception is possible. Conversion of the polarized, optical signal into the optical signal having the orthogonal polarization conditions is accomplished by a switching device. Each condition has a corresponding bit status of a data signal. The data signal effectively controls the polarizatiion of the optical signal. Hence, the frequency boost can be freely selected while maintaining excellent bandwidth characteristics and optimum sensitivity.
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Electronics Letters, Dec. 4, 1986, vol. 22, No. 25, pp. 1341-1343.
Electronics Letters, Feb. 12, 1987, vol. 23, No. 4, pp. 168-169.
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Auracher Franz
Ebberg Alfred
Meissner Eckhard
Noll Bernd
Rodler Hermann J.
Eisenzopf Reinhard J.
Negash Kinfe-Michael
Siemens Aktiengesellschaft
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