Optical signal regenerator and optical communications system incorporating same

PCT No. PCT/GB91/00732 Sec. 371 Date Nov. 23, 1992 Sec. 102(e) Date Nov. 23, 1992 PCT Filed May 8, 1991 PCT Pub. No. WO91/17474 PCT Pub. Date Nov. 14, 1991.An optical signal regenerator has a semiconductor laser in a resonant cavity defined by a mirror and a semireflective facet of the laser to form...

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Hauptverfasser:	WEBB, RODERICK P
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DEVICES USING STIMULATED EMISSION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Zusammenfassung:	PCT No. PCT/GB91/00732 Sec. 371 Date Nov. 23, 1992 Sec. 102(e) Date Nov. 23, 1992 PCT Filed May 8, 1991 PCT Pub. No. WO91/17474 PCT Pub. Date Nov. 14, 1991.An optical signal regenerator has a semiconductor laser in a resonant cavity defined by a mirror and a semireflective facet of the laser to form a resonant, non-linear, optical amplifier. A polarization beam splitter allows resonance in one polarization mode only. A clock signal generator provides clock signals in the resonant polarization mode of a power just below the optical power bistable threshold of the amplifier. An information signal coupled to the laser by a lens and the beam splitter is in a non-resonant mode of the amplifier and will give rise to a regenerator output by triggering the bistability. Because the information signal is in a non-resonant mode its wavelength need not be controlled to lie near a resonance peak of the amplifier so reducing control requirements.