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Pargmann, Carsten und Hall, Thomas (2010) Off-axis negative-branch unstable resonator with rectangular cross-section. XVIII International Symposium on Gas Flow and Chemical Lasers & High Power Lasers , 30. Aug. - 03. Sep. 2010, Sofia, Bulgarien.
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Kurzfassung
For laser media with large cross-section and low small signal gain neither the stable nor the unstable conventional resonator is an applicable choice. Either the large Fresnel number leads to a multimode operation or the low output coupling ring yields large diffraction effects and therefore a heavily structured far field. In order to reduce these diffraction effects a modified negative-branch unstable resonator (MNBUR) was introduced. In rotational symmetry the off-axis setup provides an output coupling in the shape of a half ring and is accomplished with the help of a scraper. The shape of this scraper can also be modified to adapt the MNBUR to a rectangular symmetry, whereas the spherical resonator mirrors are kept unchanged. The scraper either takes the shape of a rectangular bracket "[" or of the letter "L". The performance of both scrapers is tested using a chemical oxygen iodine laser (COIL) of the 10 kW class. The results are compared to numerical calculations.
| Dokumentart: | Konferenzbeitrag (Vortrag) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Titel: | Off-axis negative-branch unstable resonator with rectangular cross-section | |||||||||
| Autoren: |
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| Datum: | 2010 | |||||||||
| In Open Access: | Nein | |||||||||
| In SCOPUS: | Nein | |||||||||
| In ISI Web of Science: | Nein | |||||||||
| Status: | akzeptierter Beitrag | |||||||||
| Stichwörter: | COIL, unstable resonator, high power laser | |||||||||
| Veranstaltungstitel: | XVIII International Symposium on Gas Flow and Chemical Lasers & High Power Lasers | |||||||||
| Veranstaltungsort: | Sofia, Bulgarien | |||||||||
| Veranstaltungsart: | internationale Konferenz | |||||||||
| Veranstaltungsdatum: | 30. Aug. - 03. Sep. 2010 | |||||||||
| Veranstalter : | Bulgarian Academy of Sciences | |||||||||
| HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | |||||||||
| HGF - Programm: | Luftfahrt | |||||||||
| HGF - Programmthema: | keine Zuordnung | |||||||||
| DLR - Schwerpunkt: | Luftfahrt | |||||||||
| DLR - Forschungsgebiet: | L - keine Zuordnung | |||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | L - Laserforschung und -technologie (alt) | |||||||||
| Standort: | Lampoldshausen | |||||||||
| Institute & Einrichtungen: | Institut für Technische Physik | |||||||||
| Hinterlegt von: | Pargmann, Dr. Carsten | |||||||||
| Hinterlegt am: | 12 Jul 2010 10:54 | |||||||||
| Letzte Änderung: | 12 Jul 2010 10:54 |
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