Title :
Enhancement of Pumping Efficiency in a Vertical-External-Cavity Surface-Emitting Laser
Author :
Kim, Ki-Sung ; Yoo, Jaeryung ; Kim, Gibum ; Lee, Sangmoon ; Cho, Soohaeng ; Kim, Junyoun ; Kim, Taek ; Park, YongJo
Author_Institution :
Samsung Adv. Inst. of Technol., Suwon
Abstract :
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.
Keywords :
III-V semiconductors; gallium arsenide; indium compounds; laser cavity resonators; optical pumping; quantum well lasers; semiconductor quantum wells; surface emitting lasers; InGaAs; cavity mirror; distributed Bragg reflector; double-band mirror; optical pumping efficiency; pump beam reflector; pumping efficiency; vertical-external-cavity surface-emitting laser; Gallium arsenide; Laser excitation; Mirrors; Optical pumping; Pump lasers; Quantum well lasers; Reflectivity; Semiconductor lasers; Surface emitting lasers; Vertical cavity surface emitting lasers; Double-band mirror (DBM); InGaAs quantum well (QW); high-power lasers; pumping efficiency; resonant periodic gain (RPG); semiconductor lasers; vertical-external-cavity surface-emitting laser (VECSEL);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.908771
