access icon free Cross-polarisation modulation-based ultrahigh contrast operation of a Fabry–Pérot all-optical AND gate

A 31.2 dB-contrast optical AND gate based on a Fabry–Pérot semiconductor optical amplifier is experimentally demonstrated, exceeding previously demonstrated data for such a device by over 24 dB. Whereas cross-phase modulation shifts the Fabry–Pérot resonance to trigger the AND-gate functionality, cross-polarisation modulation enables ultrahigh contrast by producing a state of polarisation (SOP) for the high output-power state that is different than that of the low output-power state; a linear polariser is then used to block the low-power SOP. This technique is applicable to other resonator geometries, Kerr-nonlinear media, and to other all-optical combinational-logic gates.

Inspec keywords: optical Kerr effect; semiconductor optical amplifiers; logic gates; optical logic; optical modulation

Other keywords: low-power state of polarisation; linear polariser; ultrahigh contrast operation; low-power SOP; semiconductor optical amplifier; cross-polarisation modulation; high output-power state; Fabry-Perot resonance; all-optical combinational-logic gates; Fabry-Perot all-optical AND gate; AND-gate functionality; Kerr-nonlinear media; resonator geometry

Subjects: Beam trapping, self focusing, thermal blooming, and related effects; Lasing action in semiconductors; Laser beam modulation, pulsing and switching; mode locking and tuning; Optical self-focusing and related effects; Optical logic devices and optical computing techniques; Optical computers, logic elements, and interconnects; Design of specific laser systems; Laser beam modulation, pulsing and switching; mode locking and tuning; Optical logic elements; Semiconductor lasers

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2015.4457
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content/journals/10.1049/el.2015.4457
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