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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 40 for “"mode-locked lasers"”.
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Integrated waveguide devices for mode-locked lasers
Mode-locked lasers can provide a stable source of optical pulses with intrinsically low timing jitter, and as such have a broad range of important applications, both as sources of low-noise microwave signals and as the key enabling technology for optical frequency combs. Integrating such laser …
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Fully Integrated CMOS-compatible mode-locked lasers
… components. An on-chip high repetition-rate mode-locked laser is a key enabler of many integrated photonics applications, such as all-optical sampling, on-chip frequency combs, low phase noise microwave oscillators, photonic ADCs and others. First-ever fully-integrated on-chip mode-locked …
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Methods for engineering sub-two-cycle mode-locked lasers
… method can be applied to the design and study of mode-locked lasers, as well as the modeling of field enhancement cavities, such as those used in high harmonic generation. In contrast to the standard approach of dynamic simulation, which converges linearly, our algorithm converges quadratically to …
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TIME DOMAIN CHARACTERIZATION OF MONOLITHIC QUANTUM DOT PASSIVELY MODE-LOCKED LASERS
Passively mode-locked lasers based on InAs/GaAs quantum dots have benefited from the unique properties pertaining to this material system, leading to the demonstration of wide mode-locking operational maps, and reconfigurable repetition rates, as well as low rms timing jitter. Applications of these …
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Microwave techniques and applications for semiconductor quantum dot mode-locked lasers
Semiconductor mode-locked lasers (MLLs) are important as compact and cost-effective sources of picosecond or sub-picosecond optical pulses with moderate peak powers. They have potential use in various fields including optical interconnects for clock distribution at an inter-chip/intra-chip level as …
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Applications of Fourier Domain Mode Locked lasers for optical coherence tomography imaging
… (3D) OCT. Development of the Fourier Domain Mode Locked (FDML) laser has significantly improved the imaging performance of swept source OCT by providing an unparalleled combination of high sweep rates, large tuning ranges, narrow instantaneous linewidths, and low phase noise. This thesis …
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Silicon-germanium saturable absorbers and erbium-doped waveguides for integrated mode-locked lasers
… as crucial components for integration of a mode-locked laser on a Si-chip. The SiGe-SBR is designed to be compatible with Si-based fabrication processes for monolithic integration and to need as little saturation fluence as possible so that it can be used for higher repetition rate lasers …
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Stabilization techniques and silicon-germanium saturable absorbers for high repetition rate mode-locked lasers
The monolithic integration of passively mode-locked solid-state lasers at highest repetition rates has been prevented by Q-switching instabilities and the lack of integrable saturable absorbers to date. In this thesis we demonstrate in theory and experiment that active feedback electronics …
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Analytical and Experimental Methods for Studying Novel Cavity Geometries in Quantum Dot Mode Locked Lasers
… methods to predict and refine Quantum Dot Mode Locked Lasers (QDMLLs) for use in multiple applications are explored. Experimental investigation guided by theory greatly reduces the number of iterations to find solutions to technical problems. The fitness of the theory and methods used for …
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A preconditioned Newton-Krylov method for computing steady-state pulse solutions of mode-locked lasers
… solve the periodic boundary value problem for a mode-locked laser cavity using a specially preconditioned matrix-implicit Newton-Krylov solver. Solutions are obtained at least an order of magnitude faster than with dynamic simulation, the standard method. Our method is demonstrated experimentally …
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External Cavity Multiwavelength Semiconductor Mode-locked Laser Gain Dynamics
External cavity semiconductor mode-locked lasers can produce pulses of a few picoseconds. The pulses from these lasers are inherently chirped with a predominant linear chirp component that can be compensated resulting in sub-picosecond pulses. External cavity semiconductor mode-locked lasers can be …
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Applications and noise properties of high repetition rate : TiSapphire frequency combs
Femtosecond mode-locked lasers are a unique laser technology due to their broad optical bandwidth and potential for linking the optical and radio frequency domains when these lasers are configured as frequency combs. Ti:Sapphire based mode-locked lasers offer considerable advantages over other …
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High-precision optical and microwave signal synthesis and distribution
… pulse synthesis by coherent superposition of mode-locked lasers. Timing and phase synchronization of ultrabroadband Ti:sapphire and Cr:forsterite mode-locked lasers is studied. Subfemtosecond (<0.4 fs) timing synchronization over 12 h is demonstrated. In addition to the timing lock, phase …
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Noise and synamics in semiconductor lasers
… on the noise and dynamics in continuous wave and mode-locked semiconductor lasers is presented. The main focus is on semiconductor cascade lasers and semiconductor mode-locked lasers. In semiconductor cascade lasers, multiple gain stages are connected electrically in series. Each electron injected …
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Ultrashort, High Power, And Ultralow Noise Mode-locked Optical Pulse Generation Using Quantum-dot Semiconductor Lasers
… generation based on active, passive, and hybrid mode-locked quantum dot semiconductor lasers with target applications such as optical interconnect and high speed signal processing. Design guidelines are developed for the single mode operation with suppressed reflection from waveguide …
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Hybrid Silicon Mode-Locked Laser with Improved RF Power by Impedance Matching
<p>The mode-locked laser diode (MLLD) finds a lot of use in applications such as ultra high-speed data processing and sampling, large-capacity optical fiber communications based on optical time-division multiplexing (OTDM) systems. Integrating mode-locked lasers on silicon makes way for highly …
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Mode-locked laser diodes for the 750 – 770 nm spectral region
Ultrashort pulse lasers are widely used in research, industry, medicine, and communications, because of their characteristics of narrow pulse width, high repetition frequency, broad spectrum and high peak power. They are influencing and changing our world. Mode-locking is an effective way to …
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True linearized intensity modulation for photonic analog to digital conversion using an injection-locked mode-locked laser
… thesis. This has been achieved by introducing a mode-locked laser into one of the arms of a Mach-Zehnder interferometer and injection-locking it to the input light (which is pulsed and periodic). By modulating the injection-locked laser, and combining its output light with the light from the …
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Analytical and computational methods for the study of rare event probabilities in dispersive and dissipative waves
… systems that are driven by noise, including models for fiber-based optical communication system and mode-locked lasers. Throughout the last decade, IS has emerged as a valuable tool for improving the efficiency of simulating rare events in such systems. In particular, it has shown great …
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System demonstration of an optically-sampled, wavelength-demultiplexed photonic analog-to-digital converter
… the orders-of-magnitude lower timing jitter of mode-locked lasers and implement optical sampling as a front-end for electronic ADCs. The optical-sampling, wavelength-demultiplexing approach to A/D conversion, which is explored in this thesis, offers key benefits such as ease of scalability to …
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