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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 21 for “"waveguide laser"”.
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Pulsed laser deposition of chalcogenide glass materials for potential waveguide laser applications
… many applications for small scale, solid state lasers in the near infrared, where conversely there are very few such devices. A lasing device in a rare earth doped gallium-lanthanum-sulphide thin film is attractive due to emission at wavelengths in the 2 to 5 µm region where many gasses and …
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Pulsed laser deposition of thick multilayer garnet crystal films for waveguide laser devices
… this project was to use the technique of pulsed laser deposition (PLD) to fabricate thick multilayered garnet crystal planar waveguides with rare-earth ion doped cores for use as planar waveguide laser devices. Planar waveguides are of interest because of the implications of their structure, …
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Far-Infrared Guided Wave Optics Experiments Using a Waveguide Laser With a Hybrid Output Mirror
Made available in DSpace on 2014-12-12T20:54:23Z (GMT). No. of bitstreams: 1 7624062.pdf: 4810342 bytes, checksum: 3d085567b5672133f7bb1751066d812a (MD5) Previous issue date: 1976
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Abscheidung von Neodym-Phosphatglas mittels pulsed laser deposition zur Fertigung integrierter Wellenleiterlaser
An integrated waveguide laser can consist of a pump diode laser monolithically joined to a thin film deposited in front of a pump diode on a common mount. For this purpose, a material suitable for low-temperature processing and integration with optical and electronic components has to be …
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Efficient, high-power operation of CW Yb:YAG and Q-switched Nd:YAG planar waveguide lasers
The planar waveguide gain medium o ers a good approach to creating a high- power lasers. Excellent thermal properties allow for lasers with good beam-quality and high-e ciency. A Neodymium doped YAG planar waveguide laser was actively Q-switched using a hybrid unstable resonator and acousto-optic …
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Fabrication and measurements of surface-etched grating distributed Bragg reflector laser
A laser diode emits light at a specific wavelength band and can be used in specific applications depending on its wavelength. However, the bandwidth of the laser gain is relatively broad, so a distributed Bragg reflector (DBR) laser is used to make a narrow linewidth laser. The thesis discusses …
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Simulation, Fabrication, and Characterization of Semiconductor Lasers
Semiconductor lasers are very important in today’s world, considering their applications in communication, medical, spectroscopy and also in our daily lives.This thesis discusses three different types of laser: broad area, ridge waveguide and mode locking laser. Broad area laser (BAL) is the …
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Pulsed Laser Deposition von Er:ZBLAN-Schichten für den Aufbau eines integrierten Wellenleiterlasers im grünen Spektralbereich
A production of laser active Er:ZBLAN thin films (1um) with pulsed laser deposition (PLD) on MgF2 substrates is presented in this dissertation. Er:ZBLAN films with low droplet density (<10 per 100x100um2) were produced with PLD for the first time. Optical properties (absorption- and emmision …
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UV-written devices in rare-earth doped silica-on-silicon grown by FHD
… of channels in a three-layer buried waveguide structure are then considered and results on the physical behaviour of the channels and spectroscopic properties of the rare-earth ions are reported. This study has resulted in the first demonstration of an all-UV-written waveguide laser …
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Planar waveguide devices fabricated by pulsed laser deposition
… to be a comprehensive study on the use of pulsed laser deposition to fabricate planar waveguide devices. As such, a thorough review into the state of the art of current activities in this area is initially presented. A buried Nd:GGG waveguide laser has been fabricated for the first time by PLD and …
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Design and fabrication of quantum-dot lasers
Semiconductor lasers using quantum-dots in their active regions have been reported to exhibit significant performance advantages over their bulk semiconductor and quantum-well counterparts namely: low threshold current, high differential gain and highly temperature stable light-current …
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Development of ultrashort pulse fiber lasers for optical communication utilizing semiconductor devices
… 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 exhibiting only induced absorption is used to stabilize a GHz repetition rate active …
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Growth and characterization of mid-infrared phosphide-based semiconductor diode lasers
A diode laser emitting at mid-infrared wavelength (2~5 pm) is an ideal light source for petrochemical or industrial-important gas sensing. Antimony-based III-V compound semiconductor material is the most prominent pseudomorphic epitaxy candidate for this application. However, phosphide-based …
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Tapered waveguide lasers
… concerns the design and fabrication of tapered waveguide lasers to allow efficient, high-power diode-pumping and produce diffraction-limited, near-symmetrical output, whilst maintaining a monolithic design compatible with integrated optical circuits. <br/><br/>The design rules required for …
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Bipolar cascade lasers
… the design and modeling of the Bipolar Cascade Laser (BCL), a new type of quantum well laser. BCLs consist of multiple single stage lasers electrically coupled via tunnel junctions. The BCL ideally operates by having each injected electron participate in a recombination event in the topmost …
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High repetition rate fiber and integrated waveguide femtosecond lasers
Femtosecond lasers and the development of frequency combs have revolutionized multiple fields like metrology, spectroscopy, medical diagnostics and optical communications. However, to enable wider adoption of the technology and new applications like photonic sampling, optical arbitrary waveform …
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Application of Carbon Dioxide Waveguide Lasers to Infrared Saturation Spectroscopy
The development of tunable lasers has made possible spectroscopy at a resolution previously unattainable. Although continuous-wave broadly tunable sources in the 10 pm region do not yet exist , waveguide carbon dioxide lase r s offer a useful tunability about a large number of emission lines in …
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Novel active waveguide devices in direct-bonded structures
… studies on the use of direct bonding for optical waveguide fabrication. The direct bonding technique involves contacting two ultra-clean polished surfaces to form an adhesive-free vacuum-tight bond. Optical materials bonded in this way can be formed into waveguide devices, and this work extends …
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Multi-Watt, diode-pumped planar waveguide lasers
… on progress towards diode-bar pumped crystal waveguide lasers with a high-power, high-quality output. <br/><br/>It is shown that in order to accommodate the highly divergent, non-diffraction limited output from a diode-bar pump source, a waveguide with a relatively large numerical aperture …
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High-average-power planar waveguide lasers
… towards high-average-power diode-pumped planar waveguide lasers. As a format of the laser active medium, planar waveguides take advantage of their extreme slab geometry, which is compatible with that of high-power diode lasers, offer a great degree of versatility of the pump arrangement, have …
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