Study of a QCW Light-emitting-diode (LED)-pumped Solid-state Laser

Title
Study of a QCW Light-emitting-diode (LED)-pumped Solid-state Laser
Author(s)
이종훈권진혁곽진석배상윤[배상윤]이강인[이강인]
Keywords
FIBER LASER; YAG LASER; ND; EFFICIENCY
Issue Date
201111
Publisher
KOREAN PHYSICAL SOC
Citation
JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.59, no.5, pp.3239 - 3245
Abstract
The lasing of solid-state lasers pumped by light emitting diodes (LEDs) was studied to replace the quasi-continuous-wave (QCW) laser diode in pulse laser pumping. The investigated solid-state gain media included Nd-doped solid-state materials (Nd:YAG, Nd:glass, Nd/Cr:YAG), Ti:sapphire, and solid dye. The gain medium was surrounded by arrays of LEDs very closely. The distribution of the LED radiation absorbed in the gain medium was calculated by using non-sequential may tracing software. The calculated data transferred to the cavity analysis software and the lasing characteristics were simulated. The calculated results for the absorbed LED distribution and the absorption efficiency in the Nd:YAG rod were compared to experimentally measured fluorescence profile and the absorption efficiency and were found to be accurate within an error of 11%. Among the investigated gain media, Nd/Cr:YAG showed the lowest lasing threshold. We also found that the use of reflector in the pumping chamber could lower the lasing threshold of Nd:YAG to half the lasing threshold without the reflector.
URI
http://hdl.handle.net/YU.REPOSITORY/24308http://dx.doi.org/10.3938/jkps.59.3239
ISSN
0374-4884
Appears in Collections:
이과대학 > 물리학과 > Articles
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