• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 256
  • 49
  • 29
  • 26
  • 20
  • 19
  • 16
  • 16
  • 5
  • 4
  • 2
  • 2
  • 1
  • 1
  • 1
  • Tagged with
  • 530
  • 92
  • 70
  • 70
  • 67
  • 60
  • 56
  • 54
  • 52
  • 51
  • 51
  • 51
  • 47
  • 45
  • 42
  • 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.
1

Applying vertical mirror reflector and ring resonator in the design and fabrication of photonic integrated devices

Tseng, Wen-Hsin 30 July 2007 (has links)
The purpose of this thesis is to design and fabricate vertical mirror reflector. We fabricated semiconductor laser and optical filter by vertical mirror reflector and bended waveguide. By this design, we could bend the incident optical mode and get the power splitter with coupling coefficient is 0, 0.15 and 0.5. In order to make total internal reflection in vertical reflective mirror, we used ICP-RIE dry etching process to fabricate vertical and smooth mirror. By BPM simulation, we showed that the device volume was decreased to 50%. In the semiconductor laser, we fabricated the Fabry-Perot laser by optical waveguide reflector with one input and two inputs. In addition, we also fabricated a reformatory Fabry-Perot laser by the ring resonator with one 3dB coupler, two 90o angle reflectors, and bended waveguide. In the semiconductor optical filter, we design 2¡Ñ2 90o angle reflector whose coupling coefficient is 0.15, and ring resonator with two 2¡Ñ2 90o reflector and bended waveguide. In fabrication process, first, we defined the device pattern by using photo-lithography technique. Second, we etched ridge waveguide by using dry etching and wet etching method. In order to decrease the scattering loss, we deep etched bended waveguide and the reflector. Then, we etched the reflector mirror by ICP-RIE dry etching process. Finally, we used polyimide to flatten the sides of the ridge waveguide and evaporated metal electrode. In the device characteristic, we obtained a power splitter with 65 percent and 35 percent output. It demonstrates that the light was reflected from reflective mirror to output port.
2

Low impedance wheel resonators for low voltage and low power applications = Niederohmige Speichenrad-Resonatoren für die Anwendungen in Systemen mit kleiner Spannung und geringer Leistung

Nawaz, Mohsin January 2009 (has links)
Erlangen-Nürnberg, Univ., Diss., 2009.
3

Cavity cooling and spectroscopy of a bound atom-cavity system

Maunz, Peter L. W. January 2005 (has links) (PDF)
München, Techn. Univ., Diss., 2005. / Computerdatei im Fernzugriff.
4

Einzelne Kalziumionen in einem optischen Resonator dreidimensionale Vermessung der Feldverteilung /

Guthöhrlein, Gerhard Robert. January 2001 (has links)
München, Univ., Diss., 2001. / Computerdatei im Fernzugriff.
5

Cavity cooling and spectroscopy of a bound atom-cavity system

Maunz, Peter L. W. January 2005 (has links) (PDF)
München, Techn. University, Diss., 2005.
6

Single atom detection in low finesse cavities

Haase, Albrecht. January 2005 (has links) (PDF)
Heidelberg, University, Diss., 2005.
7

Kontrollierte Erzeugung einzelner Photonen in einem optischen Resonator hoher Finesse

Hennrich, Markus. January 2003 (has links) (PDF)
München, Techn. Universiẗat, Diss., 2003.
8

A micromachined silicon accelerometer

Pember, Andrew January 1995 (has links)
No description available.
9

Investigation of microwave converters using Perovskite-type materials

Nakhwal, Jaspal Singh January 1992 (has links)
No description available.
10

Novel self-adaptive Nd:YAG laser resonators

Udaiyan, Darren January 1998 (has links)
No description available.

Page generated in 0.0511 seconds