We demonstrated a 1×4 all-optical packet switch using injection-locking in a FabryPerot laser diode for all-optical header processing and cross gain modulation in an SOA for packet switching. 2004 Optical Society of America OCIS codes: (230.1150) All-optical devices; (190.1450) Bistability; (140.3520) Lasers, injection-locked

Passive mode-locking in two-section InAs/InP quantum dot laser diodes operating at wavelengths around 1.55 μm is reported. For a 4.6-GHz laser, a large operating regime of stable mode-locking, with RF-peak heights of over 40 dB, is found for injection currents of 750 mA up to 1.0 A and for values of the absorber bias voltage of 0 V down to −3 V. Optical output spectra are broad, with a bandwidt...

Neurons of the avian nucleus laminaris (NL) provide a neural substrate for azimuthal sound localization. We examined the optimal stimuli for NL neurons to maintain high discharge rates, reliable phase-locking, and sensitivity to time-delayed stimuli. Whole-cell recordings were performed in chick [embryonic days 19-21 (E19-E21)] NL neurons using an in vitro slice preparation. Variation of membra...

The effects of injection locking a laser diode which is also subject to varying levels of optical feedback from an external Ž . reflector are investigated. It is found that the locking range of a laser diode with optical feedback LDWOF is reduced relative to that of a solitary laser diode depending on both the increased photon lifetime and the amount of optical feedback. When the LDWOF is locke...

We have numerically investigated the dynamics of frequency shifts in semiconductor lasers under injection a comb. studied effect comb spacing on locking bandwidth. Frequency was found to play an important role boundaries bandwidth as well shift SL peak.

We study the rational harmonic mode-locking (RHML) order dependent pulse shortening force and dynamic chirp characteristics of a gain-saturated semiconductor optical amplifier fiber laser (SOAFL) under dark-optical-comb injection, and discuss the competition between mode-locking mechanisms in the SOAFL at high-gain and strong optical injection condition at higher RHML orders. The evolutions of ...

Pyramidal cells and interneurons in rat prefrontal cortical slices exhibit subthreshold oscillations when depolarized by constant current injection. For both types of neurons, the frequencies of these oscillations for current injection just below spike threshold were 2--10 Hz. Above spike threshold, however, the subthreshold oscillations in pyramidal cells remained low, but the frequency of osc...

The outsourcing of the design and manufacturing integrated circuits has raised severe concerns about piracy Intellectual Properties illegal overproduction. Logic locking emerged as an obfuscation technique to protect outsourced chip designs, where circuit netlist is locked can only be functional once a secure key programmed. However, Boolean Satisfiability-based attacks have shown break logic l...

Theory and experiment for dc and small-signal electrical modulation of an injection-locked quantum-well (QW) Fabry-Perot laser are presented. Our experiment is realized by performing side-mode injection locking of a multiple-quantum-well (MQW) InGaAsP FabryPerot (FP) laser, which has the advantage of optical wavelength conversion. We first measure the dc characteristics and optical spectra of a...