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 106 for “"diode laser"”.
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Ultrashort pulse generation from diode laser devices
… of generation of ultrashort optical pulses from diode lasers. Simple and cost-effective techniques were used to generate high power, high quality optical short pulses at various wavelength windows. The major achievements presented in the thesis is summarised as follows. High power pulses …
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Femtosecond nonlinearities in AlGaAs diode laser amplifers
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Directly diode-laser-pumped titanium-doped sapphire lasers
… 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 …
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Novel diode laser absorption techniques for combustion diagnostics
… such as gas chromatography. In this thesis two laser absorption measurement techniques are applied to measure the soot distribution, and acetylene concentration profiles in a flat-flame burner. The in-situ measurement of the distribution of particulate matter in flames is a key step in …
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Environmental Monitoring - using diode-laser-based spectroscopic techniques
… pollutant emissions related to human activity. Diode-laser-based spectroscopic techniques, being robust and affordable, have a great potential to become an industrially well-established technology for environmental sensing. This thesis deals with the further development of these techniques, …
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Advances in tunable diode laser spectroscopy for aero engine research
Tunable diode laser spectroscopy (TDLS) is a widely used technique for the measurement of gas species and offers in-situ operation, accuracy and faster response time compared to other optical and non-optical gas sensing techniques.The work in this thesis focusses on the measurement of CO2 in the …
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A Cavity-stabilized diode laser for dipole trapping of ytterbium
Bad-cavity lasers using a gain medium with a narrower linewidth than the laser cavity have the potential to achieve very narrow linewidths and extremely long coherence times. Such lasers could serve as active frequency standards or enable very-long-baseline interferometric telescopes at optical …
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Near-infrared tunable diode laser absorption spectrometer for trace gas detection
A ground based near-infrared tunable diode laser absorption spectrometer (TDLAS), capable of measuring methane (CH₄) and nitrous oxide (N₂0) in their natural abundance's within the atmosphere, has been designed and constructed. The spectrometer has high resolution (0.0003 cm⁻¹), high precision …
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Near infrared tunable diode laser spectroscopy for aero engine related applications
Tunable diode laser spectroscopy is a widely used technique for recovering quantitative gas information in a range of industrial applications. Established methods often use readily available, robust and low cost optoelectronic hardware in the near-infrared, with output wavelengths that coincide …
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A narrow linewidth diode laser system for strontium laser cooling applications
The diode laser system for laser cooling on the 1S 0 → 3P1 intercombination line of strontium discussed in this thesis allows us to cool and trap an atomic strontium sample to 15 muK. Samples in this temperature range are useful for the development of the next generation of atomic frequency …
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Diode Laser Spectroscopy for Measurements of Gas Parameters in Harsh Environments
… other gases. Hence, over the last forty years, diode laser spectroscopy (DLS) has become an established method for non-intrusive measurement of gas properties in scientific as well as industrial applications. Wavelength modulation spectroscopy (WMS) is derivative form of DLS that has been …
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Optical manipulation of helium(2(3)S) atoms with a diode laser
A commercial Spectra Diode Laboratories, 1.083 $\mu$m diode laser has been used to efficiently spin polarize an atomic beam of He(2$\sp3$S) metastable atoms by optical pumping on the $\rm 2\sp3S\sb1\rightarrow2\sp3P\sb1$ (D1) transition. The diode laser is an InGaAs/GaAs strained multiquantum well …
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Microwave characterization of vertical cavity surface emitting diode laser and transistor laser
Semiconductor lasers are widely deployed in optical transceivers for optical fiber based short-reach (< 100m) data links. With increasingly growing data traffic worldwide in data centers, developments of faster optical transceivers, hence high-speed semiconductor lasers, are highly demanded. The …
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A 674 nm external cavity diode laser for a ⁸⁸Sr⁺ ion trap
… In this thesis, a 674 nm extended cavity diode laser is built to address an optical quantum bit in ⁸⁸Sr⁺ with the goal of testing such traps. To find this transition, a depletion experiment is performed in which the 674 nm transition depopulates the principal 422 nm transition, causing a …
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Chirp compensation in active mode-locked semiconductor diode laser using a DFB
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Spectroscopy of Tm3+ : YLF as a laser material for diode laser pumping
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1988.
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Femtosecond gain-index coupling in femtosecond nonlinearity measurements of InGaAsP diode laser amplifiers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser
High speed semiconductor lasers are used in optical transceivers for short-reach data links. With fast-growing data capacity and traffic in the data centers around the globe, faster optical transceivers are demanded. A microcavity vertical cavity surface-emitting laser (VCSEL) is able to show a …
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