Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1993-02-08
1995-08-22
Boudreau, Leo H.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359181, 359189, 359195, 372 26, H04B 1000
Patent
active
054445612
ABSTRACT:
An optical transmission apparatus of NRZ modulation system includes a laser driving circuit for deriving a current obtained by adding together an NRZ modulation signal, a D.C. bias, and a clock signal having an amplitude smaller than the bias, a semiconductor laser driven by the laser driving circuit, an optical fiber for transmitting a laser beam from the semiconductor laser to a reception side, a photodetector for detecting a laser beam on the reception side and converting the detected laser beam to an electrical signal, a data regenerating circuit for deriving an NRZ modulation signal from the detected electrical signal, and a clock extracting circuit for extracting the clock signal superposed on the NRZ modulation signal from the detected electrical signal.
REFERENCES:
patent: 3774178 (1973-11-01), Curtis
patent: 4611352 (1986-09-01), Fujito et al.
patent: 4679252 (1987-07-01), Holland
patent: 4736120 (1988-04-01), Foster
patent: 4833680 (1989-05-01), Kaiser et al.
patent: 4876442 (1989-10-01), Fakushima
patent: 4980891 (1990-12-01), Izadpanah
patent: 5121416 (1992-06-01), Takano
D. Lutzke, Lichtwellenleitertechnik, 1986, pop. 308-327.
K. Kroschel, Datenubertragung, 1991, pp. 213-215.
Electronics Letters, vol. 25, No. 21, Oct. 12, 1989, pp. 1465-1466, "7.7 Gbit/s Benchtop Regenerator."
Electronics Letters, vol. 38, No. 8, Aug. 1990, pp. 1122-1124, "A Narrow Bandpass Microstrip Filter for High-Speed Fiber Optic Systems."
Silva, Sensitivity degradation with Laser wavelength chirp for direct-detection optical receivers, IEE Proceedings vol., 136 Aug. 1989.
Bacares Rafael
Boudreau Leo H.
Kabushiki Kaisha Toshiba
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