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.
Results
Showing 1 to 20 of 27 for “"Ti:Sapphire laser"”.
-
Investigating noise reduction in an octave-spanning Ti:sapphire laser
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2004.
-
Characterisation and assessment of a broadband tunable Ti:Sapphire laser for use in C.A.R.S. spectroscopy
This thesis deals specifically with the operation of the Ti:Sapphire laser. The laser was obtained from BMI Industries in a kit form. The component parameters were first determined to use in theoretical models of the laser's operation. The laser was then assembled and optimized in order to get the …
-
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 …
-
Sub-femtosecond precision timing distribution, synchronization and coherent synthesis of ultrafast lasers
… sub-femtosecond measurement, control and distribution of ultrafast optical pulse trains, with respect to pulse timing and phase. First, analytical analysis of the balanced optical cross-correlator (BOC) for attosecond precision pulse timing measurement is presented for both short and long crystal …
-
461nm laser for studies in ultracold neutral strontium
A 461 nm laser was constructed for the purposes of studying ultracold neutral strontium. The dipole-allowed 1 S0 → 1P1 transition at 460.862 nm can be used in laser cooling and trapping; optical imaging, Zeeman slowing, and photoassociative spectroscopy. We produce light at this wavelength by …
-
Directly diode-laser-pumped titanium-doped sapphire lasers
Titanium-doped sapphire is one of the most versatile laser gain materials. Tunable between 0.7 m and 1.1 m and capable of generating femtosecond pulses, the Ti:sapphire laser has become an important tool for many applications. Its ubiquitous use across many scientific disciplines is increasingly …
-
An ultrafast thermal emission spectrometer for investigating temporal thermal emission of metal thin-films and their reactive derivatives
… system was constructed for studying the reaction of nanolaminate thermites in both the temporal and spectral domains. 1mJ pulses from a Ti:Sapphire laser, stretched to 10ps, were focused onto sample films affixed to glass slides. The emission generated by the ablation of the films was …
-
A novel few-cycle optical source in the mid-infrared
… I designed, simulated, and implemented a novel optical pulse generation system which is shown to be able to generate exceptionally short optical pulses in the mid-infrared, tunable from 2-4[mu]m with pulse widths as low as 1.5 optical cycles at 3.5[mu]m (18fs). Energies as high a 1[mu]J were …
-
Investigation of broadband laser spectral fluctuation to CARS
An investigation is made into the major factors contributing to shot-to-shot spectral fluctuations in a broadband dye laser with a view to reducing noise in Coherent Anti-Stokes Raman Spectroscopy (CARS). Combinations of three dyes and methods of quantifying noise in spectra are investigated. …
-
Femtosecond optical parametric oscillators for the mid-infrared
… in this thesis is concerned with the generation and characterisation of femtosecond pulses in the near and mid-infrared spectral regions. The three optical parametric oscillators which were constructed were synchronously- pumped by a self-modelocked femtosecond Ti:sapphire laser. …
-
A novel single-cycle optical source in the mid-infrared
In this thesis, I demonstrate the generation of single-optical-cycle pulses in the mid-infrared, which are generated using adiabatic difference frequency in an aperiodically polled lithium niobate crystal. The input pulses were generated in amplified Ti:Sapphire laser system, the construction of …
-
Optimization of sub-10 femtosecond titanium sapphire lasers
Kerr-lens mode locked Ti:sapphire lasers are the backbone of most ultrafast and attosecond pulse generation systems. As such when building such systems the experimentalist desires an easy to use and robust system to produce femtosecond pulses for use in experiments. Towards this end I will discuss …
-
Investigation of Multi-Photon Excitation in Argon with Applications in Hypersonic Flow Diagnostics
<p>Non-intrusive flow diagnostics are essential for studying the physics of hypersonic flow wake regions. To advance the development of next generation hypersonic vehicles and to improve computational fluid dynamics techniques in the hypersonic regime, NASA needs a suitable non-intrusive diagnostic …
-
Octave-spanning lasers for optical metrology applications
… frequency comb based on a prismless, Ti:sapphire laser. It covers in detail the design and construction of the laser system, as well as the electronic stabilization scheme used to control the frequencies of the mode comb. The system developed is suitable for optical metrology …
-
3 GHz Yb-fiber laser based femtosecond sources and frequency comb
Many applications require femtosecond lasers of high repetition rate. In the time domain, a higher repetition rate means more pulses in a fixed time period. For nonlinear bio-optical imaging in which photo-induced damage is caused by pulse energy rather than average power, increasing pulse …
-
Developing a spin polarized helium ion source for surface electronic structure studies
… energy spin polarized He$\sp+$ source for application in studies of electron spin correlations in ion neutralization at surfaces is described. The source is based on an optically pumped helium discharge. An rf discharge is used to produce metastable helium atoms in a clean pyrex glass cell. A 300 …
-
Toward single-cycle optical pulses
Single-cycle optical pulses, the never-before-achieved regime, have a great potential for attosecond science and phase-sensitive nonlinear optics. To achieve single-cycle optical pulses by active synchronization, three major steps are required. Firstly, two very stable and broadband mode-locked …
-
Electronic States near Surfaces - a) Analysis of calculation methods using semi-infinite boundary conditions; b) Sensitive detection using laser photoelectron spectroscopy
Photoelectron spectroscopy with pulsed laser excitation can provide a low-background, sensitive view of electronic states in the band gap and photo-populated states above the Fermi level. Measurements of photoelectron emission for ultra-high vacuum cleaved surfaces of CdSe, excited by 4.5 and 5.9 …
-
Gallium and titanium diffused optical waveguide devices in sapphire
… describes new methods to realise an integrated Ti:Sapphire laser using thermal ionic diffusion. Passive and active waveguides were fabricated by thermal diffusion of gallium and titanium ions in sapphire.<br/><br/>Theoretical simulations were established which describe the potential of planar …
-
Addition and recombination reactions of unsaturated radicals using a novel laser kinetics spectrometer
This thesis describes the construction of a novel, low-noise laser kinetics spectrometer. A quasi-CW (picosecond pulse), tunable Ti:Sapphire laser is used to detect various transient species in laser flash photolysis kinetics experiments via direct absorption. The spectral range of the laser, when …
Page 1 of 2