Title :
A Measurement of Modal Gain Profile and Its Effect on the Lasing Performance in Vertical-External-Cavity Surface-Emitting Lasers
Author :
Kim, Jun-Youn ; Cho, Soohaeng ; Lee, Junho ; Kim, Gi Bum ; Lim, Seong-Jin ; Yoo, Jaeryung ; Kim, Ki-Sung ; Lee, Sang-Moon ; Shim, Jongin ; Kim, Taek ; Park, YongJo
Author_Institution :
Photonics Project Team in Display Device & Material Lab., Samsung Adv. Inst. of Technol., Suwon
Abstract :
We investigate the effect of relative wavelength difference between material gain and resonance peaks on lasing performance in vertical-external-cavity surface-emitting lasers (VECSELs). We propose a measurement method of the wavelength-dependent modal gain profiles by inserting a birefringent filter inside a cavity in order to modulate the optical loss according to the wavelength. With knowledge of the detailed gain profiles, we achieve a stable green output power of 3.3 W and a power conversion efficiency (= green output power/pump input power) of 17% in VECSEL with a LiB3O5 crystal as an intracavity frequency doubler
Keywords :
birefringence; laser stability; laser variables measurement; lithium compounds; optical filters; optical harmonic generation; optical materials; semiconductor lasers; surface emitting lasers; 17 percent; 3.3 W; LiB3O5; VECSEL; birefringent filter; intracavity frequency doubler; modal gain profile measurement; optical loss; power conversion efficiency; stable green output power; vertical-external-cavity surface-emitting lasers; Gain measurement; Optical filters; Optical materials; Optical modulation; Optical surface waves; Performance gain; Power generation; Surface emitting lasers; Vertical cavity surface emitting lasers; Wavelength measurement; External cavity lasers; high power laser; second-harmonic generation (SHG); vertical-cavity lasers;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.887217
