Global ETD Search
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 41 for “"Mode-locking"”.
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Quantum theory of mode locking.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 1971
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Mode-locking of thulium-doped and Erbium-doped fiber lasers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Development and application of saturable absorbers to femtosecond solid-state laser mode-locking
… types of saturable absorbers to self-starting mode-locking in solid-state lasers was examined. The first part of this thesis describes the use of an epitaxially grown saturable Bragg reflector to mode-lock an extended cavity femtosecond Cr:LiSAF laser. Inexpensive single mode diodes were used …
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Continuous wave mode locking for the determination of the acoustic nonlinearity parameter B/A
The acoustic nonlinearity parameter B/A of the nonlinearity of the equation of state for a fluid. Its significance can be found in numerous fields including shockwaves, bio-chemistry and medicine. Recent studies in the field of biomedical ultrasound have necessitated a simple and accurate means of …
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An overview of laser operation and modelocking of a vertical external cavity surface emitting laser (VECSEL)
… and ultrashort pulses generated from passive mode-locking. In this work, we give a brief overview of the VECSEL structure, previous VECSEL literature, how lasing in a VECSEL works, and how mode locking in a VECSEL works.
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Development of ultrashort pulse fiber lasers for optical communication utilizing semiconductor devices
… absorption on the stability of continuous-wave mode-locking is considered theoretically. Picosecond pulses are produced from an Er/Yb waveguide laser using a semiconductor saturable absorber mirror, and the influence of two-photon absorption on mode-locking is studied. A semiconductor mirror …
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High power ultra-short pulse Quantum-dot lasers
… 1.3 µm wavelengths is demonstrated through novel mode-locking regimes such as dual-wavelength mode-locking, wavelength bistability and broad tunability. Moreover, broad pulse repetition rate tuning using an external cavity configuration is presented. A high peak power of 17.7 W was generated from …
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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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Novel Approaches to Power Scaling In Mode-Locked Laser Diode Based Ultrashort Pulse Sources
… to upscaling the average output power of mode-locked laser diode ultrashort pulse sources were investigated. This was done with the motivation of developing mode-locked laser diode based light sources for nonlinear bioimaging applications to which high repetition rate pulse sources such as …
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Mode-locked laser diodes for the 750 – 770 nm spectral region
… They are influencing and changing our world. Mode-locking is an effective way to generate ultrashort pulses. Semiconductor mode-locked lasers are excellent candidates for ultrashort pulse generation due to their advantages in compactness, weight, energy efficiency and cost. In this …
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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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The development of components for ultrafast all-optical communication networks
… of producing pulses shorter than a picosecond. Mode-locking of laser cavities is an attractive method of ultrashort pulse generation. A semiconductor saturable absorber mirror is a monolithically integrated device utilized for passive mode-locking of a wide variety of lasers. The development of …
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Design, optimization, and applications of few-cycle Ti:Sapphire lasers
Ti:Sapphire mode-locked lasers are a unique technology that enables a wide variety of applications. Owing to the ultrabroadband nature of the Ti:sapphire crystal and the invention of precisely engineered dispersion-compensating mirrors (DCMs), these lasers are now capable of generating stable pulse …
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Radio frequency and terahertz signals generated by passively mode-locked semiconductor lasers
… for example: Q-switching, gain switching or mode-locking schemes. In general the active or passive mode-locking techniques require the use of a modulator or a saturable absorber in order to achieve the phase synchronisation. The laser diodes studied in this thesis, are demonstrated to operate …
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Generation and storage of ultrashort pulses using optical fiber devices
… were investigated for this thesis: actively modelocked fiber lasers, optical fiber ring buffers, and passively mode-locked fiber lasers. Intra-cavity soliton compression was employed in an actively mode-locked fiber laser to reduce the pulse width by a factor of 4.4 below the pulse widths …
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Charge-Density-Wave Transport in Quasi - One-Dimensional Conductors
… in response to applied dc voltages and of mode-locking phenomena observed in response to combined ac and dc voltages indicate a nearly complete analogy with similar effects observed in Josephson junctions. Even though these effects result from CDW interaction with randomly-distributed …
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Bidirectional mode-locked fiber ring laser
In modern day world, advances in technology are constantly pushing the limits of improvement in measurement accuracy. With each passing year, government agencies and contract companies increase investment in research of high precision, ultra sensitive, instruments. Over the last decade, …
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The quasi mode-locked regime: glassy disorder and turbulent dynamics in fiber laser
In this work, we investigate the quasi mode-locked (QML) regime in a Yb-doped mode-locked fiber laser, a new and largely unexplored operating phase where intensity fluctuations reveal complex collective behavior. Although this regime may be familiar to experimentalists working with mode-locked …
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