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Showing 1 to 12 of 12 for “"Optical injection"”.
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Characterization of the Dynamics of Optically-Injected Nanostructure Lasers
… and most compact approach to pass data onto an optical fiber; however, their intrinsic limitations under direct-modulation such as wavelength chirp and inherent relaxation oscillation frequency constraints impede their high-speed and long-distance capabilities. The injection-locking of …
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Dynamics and interactions of cavity solitons in photonic devices
… are investigated - a semiconductor laser with optical injection, a semiconductor laser with frequency selective feedback and a nonlinear cavity with a Kerr material. Cavity solitons have common features which can be observed in all three systems as well as properties which are unique to each …
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Enhanced Modulation Dynamic Performance of Optically-Injected Widely-Tunable Semiconductor Lasers
… modulation regimes using external light for optical injection-locking (OIL). It is demonstrated that modulation performance of free running (FR) widely tunable lasers strongly depends on the tuned lasing wavelength. The relaxation oscillation frequency (ROF) of FR TLD increases from 2.2 GHz …
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Nonlinear Dynamics of solitary and optically-injected spin vertical-cavity lasers
… emitted by the QW spin VCSELs under polarised optical injection. Rich nonlinear dynamics of the optically injected QW spin-VCSEL are reported ranging from polarisation control, polarisation switching and bistability to periodic oscillations and chaos. Good agreement is found between …
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External control of semiconductor nanostructure lasers
… such as data transmitters in ultra fast optical communications. This is mainly due to their unique carrier dynamics compared to conventional quantum-well lasers that enables their potential for high differential gain and modified linewidth enhancement factor. However, there are known …
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Monolithically integrated, high coherence frequency comb generation through on-chip gain switching
… networks are being widely considered. Optical frequency comb sources have the potential to reduce or eliminate the spectrally inefficient guard bands that are currently used to prevent cross-talk between adjacent channels. With their common laser source and fixed phase relation, …
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Modulation of coherently coupled surface-emitting laser arrays: analysis and applications
… (VCSELs) have become the dominant source for optical data communication links in computer server, data center, and super computer applications. Driven by the exponential increase of performance in information technology, data centers, and computational power, data transmission bandwidth is …
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A multi-protocol quantum key distribution transmitter
… theoretically perfect security using standard optical fibres. This is possible by transmitting the key on single photons, meaning a measurement by an eavesdropper disturbs the system in a way observable to the legitimate parties. The technology has advanced since the first protocol proposed in …
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Optically injected dual state quantum dot lasers
… characteristics to the excitable pulses seen in optically injected lasers. This thesis investigates the feasibility of optically injected dual state quantum dot lasers as artificial photonic neurons. Photonic waveguides are not as sensitive to centimetre long transmission lines as electronic …
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Optical comb injection for optical demultiplexing and harmonic frequency locking
… the continued growth of internet traffic, new optical communication infrastructures capable of dramatically increasing network bandwidth are being considered. Optical superchannels consisting of densely packed channels will be required for future networks, which could potentially be implemented …
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Optically injected multi-mode semiconductor lasers
… model. Secondly, this work aims to utilise the optically injected semiconductor laser as a tool so study non-linear phenomena in other fields of study, namely ’Rogue waves’ that have been previously witnessed in oceanography and are suspected as having non-linear origins. The first half of this …
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Short pulse generation from semiconductor lasers: characterization, modeling and applications
… that has been carried out on the generation of optical pulses, with duration of tens of picoseconds, from semiconductor lasers. The work is focused on 1550 nm Vertical Cavity Surface Emitting Lasers (VCSEL), which are promising optical transmitters due to their advantageous characteristics in …