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 325 for “"single mode"”.
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Coupling Down Converted Light Into Single Mode Fibers
… the influence of the pump and collection mode parameters on the collection efficiency of Type I down converted photons into single mode fibers. For best single and coincidence counting rates, we find that the mode sizes should be close to the same size and that the mode waists should be …
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Photo-induced birefringence in single-mode optical fiber
Single-mode optical fiber has been widely used not only in long-haul, high speed digital communication systems but also in sensing applications because of its inherent immunity to electromagnetic interference, low transmission loss, wide bandwidth, small size, and light weight. Birefringence is an …
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High-power single-mode vertical-cavity surface-emitting lasers
… of their features. Those that operate in the single-mode regime with sufficiently high power are of particular interest because of the need for an energy-efficient solution to the shrinking bit size in hard disk drives. This work addresses this problem by a careful study of the …
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Analysis of Thermally Diffused Single Mode Optical Fiber Couplers
… of dopants can improve the uniformity of multimode star couplers manufactured by the fused biconical taper technique. The theoretical basis for the same phenomenon in a single mode coupler is developed, on the basis of the theory of diffusion and the Gaussian approximation for circular fibers. …
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Time domain chromatic dispersion measurements in single mode optical fibers
… chromatic dispersion measurement system for single-mode optical fibers is presented for easy measurements in both the laboratory and the field. This technique uses a relative group delay of a band of light at slightly different wavelengths from a single pulsed laser diode to determine …
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Analysis and design of broadband single-mode multi-clad fibers
… been paid to the study of dispersion-flattened single-mode fibers which offer a high transmission capacity with low losses through a wide range of wavelengths. However, the existing designs are sensitive to bending and manufacturing tolerances, and are not truly single-mode at most wavelengths …
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Selective mode coupling in microring resonators for single mode semiconductor lasers
Single mode semiconductor laser diodes have many applications in optical communications, metrology and sensing. Edge-emitting single mode lasers commonly use distributed feedback structures, or narrowband reflectors such as distributed Bragg reflectors (DBRs) and sampled grating distributed Bragg …
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Performance analysis of single mode optical fiber star networks with reflections
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
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Simulation of single mode si waveguides and electro-optic coupling modulators
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Loss phenomena in perturbed single-mode optical fibers: investigation and applications
Losses induced in a single-mode fiber due to periodic spatial deformations along the fiber axis have been investigated spectrally. Deformation losses in several single-mode fibers were found to be strongly wavelength dependent. This wavelength dependence was characterized by narrow attenuation …
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Single mode excitation in the shallow water acoustic channel using feedback control
… far-field propagation in a discrete set of modes. Ocean experiments have confirmed the modal nature of acoustic propagation, but no experiment has successfully excited only one of the suite of mid-frequency propagating modes propagating in a coastal environment. The ability to excite a …
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Single mode excitation in the shallow water acoustic channel using feedback control
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Effects of optical nonlinearities on frequency multiplexed single mode optical fiber systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1987.
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An investigation of shallow water mode coupling effects during single mode transmission
Thesis (M.S.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and the Woods Hole Oceanographic Institution), 1994.
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High-power single-mode vertical-cavity surface-emitting lasers via impurity induced disordering
… the influence of IID on electrical, optical, and mode-control properties. A transfer matrix method (TMM) is developed to account for the diffusion of Group III atoms of the distributed Bragg reflectors (DBR) that comprise the VCSEL. In addition, a simple fiber model is used to design the …
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Spatial tracking using an electro-optic nutator and a single-mode optical fiber
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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The development of III-V single-mode lasers based on semiconductor optical amplifier heterostructures
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Experimental Verification for Microwave Processing of Materials in a Single Mode Rectangular Resonant Cavity
… data which will be used to verify numerical models. Accurate test data are essential to the development of precise, comprehensive models that can be used in applicator design and heating control strategies for thermal runaway materials. The experimental program explores the difficulties of …
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