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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Electric field birefringence and light scattering of polydisperse colloids

Watson, Rupert M. J. January 1992 (has links)
No description available.
12

A multi-sensor global navigation system for autonomous mobile robots

Hope, Julian Charles January 1995 (has links)
No description available.
13

InGaAsP multiple-quantum well Fabry-Perot optical modulators for soliton systems at #lambda# = 1.55 #mu#m

Killey, Robert Ian January 1997 (has links)
No description available.
14

Passive signal processing techniques for miniature fibre Fabry-Perot interferometric sensors

Ezbiri, A. January 1996 (has links)
This thesis describes new signal processing techniques applicable to miniature low finesse Fabry-Perot interferometric sensors. The principle of operation behind the techniques presented resides in the use of the axial modes from a single multimode laser diode to produce a series of phrase shifted interferometric outputs in conjunction with the path imbalance of the sensor microactivity.
15

Thermally Controllable Microring Resonator-based Silicon Photonic Switch

Ng, Han-Yong 01 January 2007 (has links)
A 4 × 4 photonic switch matrix was designed, fabricated and characterized. The photonic switch matrix was based on microring resonator (MR) and was fabricated on relatively low-cost silicon-on-insulator (SOI). Independent wavelength channel switching was accomplished by thermo-optic tuning of the MRs through highly localized resistive micro-heaters. The device was fabricated using the relatively mature silicon fabrication technology. Waveguide patterns were defined with high definition eBeam lithography, etching was done in a reactive-ion etching chamber, and the top cladding SiO2 layer was deposited through plasma-enhanced chemical vapor deposition. Finally, resistive Nichrome micro-heaters were deposited locally directly above each MR to offer the dynamic tuning capability. The strong optical confinement offered by the high index contrast between silicon and SiO2 makes it possible to fabricate micrometer-sized MRs with acceptable optical power loss caused by the small bending radii. The MRs were designed with a uniform diameter of 10 µm to support a wide free spectral range. All waveguides have a design dimension of 450 nm × 250 nm to allow operation exclusively in the fundamental mode at the 1.55 µm wavelength. A FSR of 18 nm with a spectral linewidth of 0.1 nm were observed for the fabricated MRs offering high wavelength selectivity. The device exhibits virtually no thermal crosstalk between adjacent channels, showing no output peak wavelength shift at 0.01 nm wavelength measurement precision by thermally tuning an adjacent MR with electric current as high as 7 mA, which is equivalent to about 2.5 nm in resonance wavelength tuning. The device showed a tuning delay time of about 1 ms. The overall bare chip size of the device is 20 mm × 4 mm. We demonstrated through this work a wavelength selective photonic switch device using low-cost SOI technology that is compact and easy to fabricate. It shows high potential for further development into high port-count photonic switch matrix.
16

EARLY STAGES OF MYELINATION IN RAT OPTIC NERVE

Detering, Nancy Kathleen, 1947- January 1974 (has links)
No description available.
17

Detection of magnetic fields using fibre optic interferrometric sensors

Pratt, R. H. January 1985 (has links)
No description available.
18

Implementation of a Faraday Effect based optical current transducer using digital signal processing techniques

Niewczas, Pawel January 2000 (has links)
No description available.
19

Performance and control of the SAE AS4074.1 Local Area Network for military avionics applications

Burrage, T. M. January 1992 (has links)
No description available.
20

Infantile optic atrophy with dominant mode of inheritance; a clinical and genetic study of 19 Danish families. [Tr. from the Danish].

Kjer, Poul. January 1959 (has links)
Afhandling - Copenhagen.

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