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Title: Power scaling of Tm:YLF-pumped Ho:YAG lasers
Author: So, Sik
ISNI:       0000 0004 2667 6826
Awarding Body: University of Southampton
Current Institution: University of Southampton
Date of Award: 2007
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Reported in this thesis are methodologies for power-scaling Ho:YAG lasers for both the continuous-wave (CW) and Q-switched regime. Advancement in Ho:YAG laser power is made possible through the improvements in output power of the Tm:YLF pump lasers. The slab geometry provides good thermal management characteristics which helps to overcome the limitations set by the thermally-induced stress fracture when scaling output power of Tm:YLF lasers. In conjunction with the use of novel holmium cavity designs that allow the use of slab pump lasers, high-power Ho:YAG lasers are realised. of 18.3 x 3.3. The slope efficiency was 61 % with respect to the thulium incident power, and the lasing wavelength was 2090 nm. Pulse energies as high as 14 mJ were achieved when Q-switched at 20 Hz, with a pulse duration of 17 ns. Further future improvements in output power and beam quality are also discussed.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: TK Electrical engineering. Electronics Nuclear engineering ; QC Physics