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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 120 for “"semiconductor lasers"”.
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Integrated Multiwavelength Semiconductor Lasers
… and linewidth as in today's single-wavelength semiconductor lasers. By utilizing multiple sections of periodic structures, dual-wavelength InGaAs-GaAs ridge waveguide semiconductor lasers have been fabricated. Not only do these dual-wavelength lasers operate at predetermined wavelengths, but …
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Single frequency semiconductor lasers
Single frequency semiconductor lasers are of interest for communication systems and spectroscopy. In communications, narrow linewidth is desirable to minimize dispersion effects and low cross-talk multiple wavelength channels on a single fiber. For GaAs-based lasers, the interest in narrow …
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Mode-locked surface emitting semiconductor lasers
… Vertical External Cavity Surface Emitting Lasers (OP-VECSELs) arc novel semiconductor-based lasers that have many advantages over other lasers in terms of the power scalability, good beam quality, compactness and low cost they can offer. They can be passively mode-locked with a …
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Optically injected multi-mode semiconductor lasers
… of modern life would not function without the lasers. However, the laser is also a window into a system that is strongly emulated by non-linear mathematical systems and are an exceptional apparatus in the development of non-linear dynamics and is often used in the teaching of non-trivial …
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Optically Pumped Thin Platelet Semiconductor Lasers
Made available in DSpace on 2014-12-08T22:24:27Z (GMT). No. of bitstreams: 1 6901366.pdf: 2274020 bytes, checksum: 9865d7ce22e6949db23bd1719b4cd5fd (MD5) Previous issue date: 1968
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Noise and synamics in semiconductor lasers
… 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 into a …
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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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Femtosecond pulse generation in surface-emitting semiconductor lasers
… pumped vertical external-cavity surface-emitting lasers (VECSELs). Continuous wave VECSELs were first designed as a type of semiconductor laser capable of producing high output power in near transform-limited beams. Optical pumping allows the output power of the device to be increased simply by …
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Organic semiconductor lasers with two-dimensional distributed feedback
… a comprehensive investigation of solid-state lasers based on thin films of a disordered organic semiconductors (OS). The high luminescence yield of OS together with their conductivity and the ease of processing them into sub-micron thick films on substrates of virtually any shape and size open …
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Circuit-Level Modeling and Simulation of Semiconductor Lasers
… models for vertical-cavity surface-emitting lasers (VCSELs) and their strong thermally and spatially dependent behavior. The first approach, implemented in both HSPICE and SABER, is a simple thermal model which incorporates a temperature-dependent offset current into the standard laser rate …
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Four-Wave Mixing in Distributed-Feedback Semiconductor Lasers
… four-wave mixing in distributed-feedback lasers with two lasing modes for both the parallel and orthogonally polarizations. For the parallel case, we develop a comprehensive model for dual-pump four-wave mixing. The experiments show that the conversion efficiency has no fundamental …
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High-Speed Modulation of Semiconductor Lasers and Modulators
… schemes. First, modulation schemes on a single semiconductor laser are investigated and compared for the first time. They include electrical modulation, optical modulation, and electrical modulation of an injection-locked laser. Electrical modulation on a single semiconductor is commonly used in …
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Threshold current and modulation response of semiconductor lasers
… imbalance in the active region of quantum well lasers is demonstrated (in contrast to the usual presumption of charge neutrality in the region), and the resulting effect on the threshold current is examined. The investigations are performed with a simple rate equation simulator, as well as with …
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Growth of III-V semiconductor lasers on silicon
The growth of reliable III-V semiconductor lasers on Si would be a significant step toward the fabrication of an opto-electronic integrated circuit, but reliable III-V semiconductor lasers grown on Si have yet to be reported. Many problems not encountered when growing III-V lasers on III-V …
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An optical phase locked loop for semiconductor lasers
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1988.
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Direct tunneling modulation and signal mixing of semiconductor lasers
… the gap between high-speed III-V compound semiconductor transistors and high-speed semiconductor lasers. In a highly integrated fashion, the transistor laser is capable of simultaneous transistor electrical operation and electron-to-photon conversion. The three-terminal transistor structure …
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Design and Analysis of Whispering Gallery Mode Semiconductor Lasers
… prevent the wide spread adoption of WGM lasers as building blocks in large-scale photonic integrated circuits. The first challenge is to reduce the electrical power consumption at desirable levels of light output power. The second target is to obtain directional light emission without …
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Short pulse generation from semiconductor lasers: characterization, modeling and applications
… sobre pulsos ópticos generados por láseres de semiconductor con duración de decenas de picosegundos. El trabajo se ha enfocado sobre diodos láser de cavidad vertical a 1550 nm, transmisores ópticos muy prometedores por sus ventajosas características en el entorno de las comunicaciones ópticas …
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