| dc.date.accessioned | 2014-03-26T10:09:04Z | |
| dc.date.available | 2014-03-26T10:09:04Z | |
| dc.date.issued | 2014-03-26 | |
| dc.identifier.uri | urn:nbn:de:hebis:34-2014032645242 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/2014032645242 | |
| dc.description.sponsorship | Faculty of science, Al-Azhar University, Assiut, Egypt.
General Directorate of Missions in Egypt.
Egyptian Culture Bureau and Study Mission in Berlin.
German Academic Exchange Services (DAAD). | ger |
| dc.language.iso | eng | |
| dc.rights | Urheberrechtlich geschützt | |
| dc.rights.uri | https://rightsstatements.org/page/InC/1.0/ | |
| dc.subject | Optical gain | eng |
| dc.subject | Spiro compounds | eng |
| dc.subject | Organic lasers | eng |
| dc.subject | Amplified spontaneous emission | eng |
| dc.subject | Variable stripe length method | eng |
| dc.subject.ddc | 500 | |
| dc.subject.ddc | 530 | |
| dc.subject.ddc | 540 | |
| dc.subject.ddc | 620 | |
| dc.title | Optical Characterization of Organic Gain Materials for UV-emitting Hybrid Complex Coupled VCSELs | eng |
| dc.type | Dissertation | |
| dcterms.abstract | In this thesis, optical gain measurement setup based on variable stripe length method is designed, implemented and improved. The setup is characterized using inorganic and organic samples. The optical gain of spiro-quaterphenyl is calculated and compared with measurements from the setup. Films with various thicknesses of spiro-quaterphenyl, methoxy-spiro-quaterphenyl and phenoxy-spiro-quaterphenyl are deposited by a vacuum vapor deposition technique forming asymmetric slab waveguides. The optical properties, laser emission threshold, optical gain and loss coefficient for these films are measured. Additionally, the photodegradation during pumping process is investigated. | eng |
| dcterms.abstract | In dieser Arbeit wird ein Aufbau zur Bestimmung der optischen Verstärkung, basierend auf der Methode der Variablen-Streifen-Länge, konzipiert, umgesetzt und verbessert. Der Aufbau wird mit anorganischen und organischen Proben charakterisiert. Die optische Verstärkung von Spiro-Quaterphenyl wird berechnet und mit experimentellen Messungen verglichen. Filme verschiedener Schichtdicken von Spiro-Quaterphenyl, Methoxy-Spiro-Quaterphenyl und Phenoxy-Spiro-Quaterphenyl werden durch ein Vakuum-Aufdampfsystem deponiert und bilden asymmetrische Plattenwellenleiter. Es werden die optischen Eigenschaften, der Laser-Emissions-Schwellwert, der optische Gewinn und der Verlustkoeffizient für diese Filme gemessen. Zusätzlich wird die Photodegradation während des Pumpprozesses untersucht. | ger |
| dcterms.accessRights | open access | |
| dcterms.creator | Abdel-Awwad, Mohamed Ahmed Haridy | |
| dc.contributor.corporatename | Kassel, Universität, FB 16, Elektrotechnik / Informatik | |
| dc.contributor.referee | Hillmer, Hartmut (Prof. Dr.) | |
| dc.contributor.referee | Fuhrmann-Lieker, Thomas (Prof. Dr.) | |
| dc.subject.pacs | Optical gain | eng |
| dc.subject.pacs | Spiro compounds | eng |
| dc.subject.pacs | Organic lasers | eng |
| dc.subject.pacs | Amplified spontaneous emission | eng |
| dc.subject.pacs | Variable stripe length method | eng |
| dc.subject.swd | Optischer Gewinn | ger |
| dc.subject.swd | Spiroverbindungen | ger |
| dc.subject.swd | VCSEL-Laser | ger |
| dc.date.examination | 2014-02-20 | |
