Enhancement of Pumping Efficiency in a Vertical-External-Cavity Surface-Emitting Laser

Enhancement of Pumping Efficiency in a Vertical-External-Cavity Surface-Emitting Laser

We report an improved optical pumping efficiency in a vertical-external-cavity surface-emitting laser (VECSEL) by employing the double-band mirror (DBM), which acts as a pump beam reflector as well as a cavity mirror. The optical pumping efficiency of a VECSEL with the DBM was increased by 23%, as c...

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Veröffentlicht in:IEEE photonics technology letters 2007-12, Vol.19 (23), p.1925-1927
Hauptverfasser: Kim, Ki-Sung, Yoo, Jaeryung, Kim, Gibum, Lee, Sangmoon, Cho, Soohaeng, Kim, Junyoun, Kim, Taek, Park, Yongjo
Format: Artikel
Sprache:eng
Schlagworte:
Beams (radiation)
Bragg reflectors
Double-band mirror (DBM)
Gallium arsenide
high-power lasers
Holes
InGaAs quantum well (QW)
Laser excitation
Mirrors
Optical pumping
Photonics
Pump lasers
pumping efficiency
Pumps
Quantum well lasers
Reflectivity
Reflectors
resonant periodic gain (RPG)
Semiconductor lasers
Surface emitting lasers
Vertical cavity surface emitting lasers
vertical-external-cavity surface-emitting laser (VECSEL)
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Zusammenfassung:We report an improved optical pumping efficiency in a vertical-external-cavity surface-emitting laser (VECSEL) by employing the double-band mirror (DBM), which acts as a pump beam reflector as well as a cavity mirror. The optical pumping efficiency of a VECSEL with the DBM was increased by 23%, as compared to one with the conventional distributed Bragg reflector. It was found that the use of the DBM was more effective in the VECSEL with the shorter absorption layer thickness.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2007.908771