Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1989-01-27
1991-06-25
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455610, 370 3, H04B 1000, H04J 1402
Patent
active
050274350
ABSTRACT:
One aspect of the invention is a Fabry-Perot cavity which has in part a waveguiding portion and in part a nonwaveguiding portion. In this manner, a cavity is constructed whose length would be too short to manipulate effectively if it were comprises exclusively of a waveguiding portion, and whose length might have unacceptable diffraction losses if it were comprised exclusively of a nonwaveguiding portion. In the inventive device the resonant wavelength can be adjusted by varying the length of either the gap or the waveguide or both. The device can be advantageously constructed and aligned using fiber coupling technology.
REFERENCES:
patent: 4638483 (1987-01-01), Bowers
patent: 4751477 (1988-06-01), Ohba
"FDM-FSK Star Network with a Tunable Optical Filter Demultiplexer", Electron. Lett., 8th Oct. 1987-vol. 23, No. 21, pp. 1102-1103 (1987).
"FDMA-FSK Star Network with a Tunable Optical Filter Demultiplexer", Journal of Lightwave Technology-9th Sep. 1988-vol. 6, No. 9, pp. 1406-1414.
Chraplyvy Andrew R.
Iannone Patrick P.
Kaminow Ivan P.
Li Tingye
Stone Julian
AT&T Bell Laboratories
Beek L. Van
Eisenzopf Reinhard J.
Weiss Eli
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