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All-optical 3R signal regeneration-a challenge for integrated optics

: Sartorins, B.

Righini, G.C. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; Technologiestiftung Innovationszentrum, Berlin:
Fiber integrated optics : 10-11 October 1996, Berlin, FRG
Bellingham/Wash.: SPIE, 1996 (SPIE Proceedings Series 2954)
ISBN: 0-8194-2358-0
Conference "Fiber Integrated Optics" <1996, Berlin>
Conference Paper
Fraunhofer HHI ()
integrated optics; laser mirrors; optical bistability; optical information processing; optical logic; optical modulation; photonic switching systems; all-optical 3r signal regeneration; transparent optical telecommunication networks; critical nonlinear optical processing functions; optical clock recovery; clocked decision; modulated laser; reflectivity control; dispersive mirror modulation; multi-section laser; optical data patterns; minor modulation; digital bistable switching; stimulated self-pulsations; optical oscillators; tunable frequency; optical amplifier; antireflection coated facets; integrated photonic signal processing circuits; 5 Gbit/s; 10 Gbit/s

Optical signal regeneration is required for implementing transparent optical telecommunication networks. Critical nonlinear optical processing functions which must be improved for full 3R signal regeneration are optical clock recovery and clocked decision. A novel device type is presented, which can be used for both clock recovery and for decision unit. It is a laser, which is modulated by controlling the reflectivity of the laser mirrors. The concept of dispersive mirror modulation and the function of the developed multi-section laser are described. The required basic functions for signal processing are verified in experiments. This includes generation of optical data patterns by minor modulation, optical control of mirrors at 5 Gb/s and demonstration of digital bistable switching characteristics. Self-pulsations are stimulated and optical oscillators with tunable frequency are realized. The devices are applied for all-optical clock recovery of 10 Gb/s data streams in a system environment. Clock recovery, decision and optical amplifier all have a very similar device structure and operate with AR coated facets. Integrated photonic signal processing circuits can be built up with these elements.