Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-10-30
1998-07-07
Negash, Kinfe-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359160, 359173, H04B 1000
Patent
active
057777667
ABSTRACT:
The device and method are based on tapping off a predetermined line signal fraction and inputting it, together with a continuous pumping radiation, to a resonant cavity which comprises a non-linear wave guide. The value of the pumping wavelength is related to the wavelength of the line signal pulses to produce therewith a four-wave mixing (FWM) effect in the non-linear wave guide. In travelling the non-linear wave guide, a clone signal is generated by FWM effect which duplicates the pulse sequence of the line signal at a clone wavelength. By adjusting the length of the resonant cavity such that, in inputting the line signal, each of its pulses will come in at exactly a pulse of the clone signal which is being circulated within the cavity, a clone signal can be circulated within the resonant cavity whose pulse sequence represents the optical clock signal sought.
REFERENCES:
patent: 5444560 (1995-08-01), Barnsley
patent: 5457559 (1995-10-01), Saito et al.
Giles et al., "All-Optical Regenerator", Electronics Letters, 7th Jul. 1988, vol. 24, No. 14, pp. 848-850.
Nakazawa et al., "NOLM Oscillator and its Injection Locking Technique for Timing Clock Extraction and Demultiplexing", Electronics Letters, 6th Jun. 1996, vol. 32, No. 12 pp. 1122-1123.
IEEE Journal of Quantum Electronics, vol. 28, No. 4, Apr. 1, 1992, pp. 895-900.
Cristiani Ilaria
Fontana Flavio
Franco Pierluigi
Negash Kinfe-Michael
Pirelli Cavi S.p.A.
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