1. Effect of Heat Spreader Location on Lasing Properties of End-Pumped Vertical-External-Cavity Surface-Emitting Lasers
- Author
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Ki-Sung Kim, Soohaeng Cho, Jun-Youn Kim, Jaeryung Yoo, Taek Kim, Sang-Moon Lee, Seong-Jin Lim, Gi Bum Kim, Junho Lee, and Yongjo Park
- Subjects
Materials science ,Physics and Astronomy (miscellaneous) ,business.industry ,Slope efficiency ,General Engineering ,General Physics and Astronomy ,Diamond ,engineering.material ,Laser ,Vertical-external-cavity surface-emitting-laser ,Power (physics) ,law.invention ,Optical pumping ,Optics ,law ,Heat spreader ,engineering ,Optoelectronics ,business ,Lasing threshold - Abstract
We characterize the lasing properties of two configurations of end-pumped vertical-external-cavity surface-emitting lasers: one with an intracavity diamond heat spreader, the other with an extracavity heat spreader. A pump-power-limited CW output power of 9.2 W at 1060 nm and a slope efficiency of ~50.3% are achieved with the extracavity heat spreader. With the intracavity heat spreader, the output power and slope efficiency are 7.6 W and 42.2%, respectively. The difference in the slope efficiency can be explained by the difference in absorption efficiency, caused by different spatial distributions of the absorbed pump light.
- Published
- 2007
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