Effects of reflective coatings on performance of divergence-narrowed external-cavity laser-diode arrays

被引：2
|
作者：
Zheng, YJ [1 ]
Miyajima, H [1 ]
Suzuki, H [1 ]
Kan, H [1 ]
机构：
[1] Hamamatsu Photon KK, Cent Res Lab, Shizuoka 4348601, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 2005年 / 44卷 / 28-32期
关键词：
laser-diode array; external cavity; reflective coating; beam divergence; output efficiency;
D O I：
10.1143/JJAP.44.L935
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
This study was conducted to experimentally investigate how reflective coatings on the front facets of laser-diode arrays (LDAs) affect the performance of external-cavity LDAs, devices that yield divergence-narrowed emission. We compared the performance of two external-cavity LDAs equipped with front facets coated with different reflective coatings (with a low or high reflectivity). Our results confirm that a low reflectivity yields a superior performance in a divergence-narrowed external-cavity LDA. At a high drive current of 39.9 A, the divergence angle of an LDA with a low-reflectivity coating of 3% was suppressed from 8.4 to 1.2 degrees at an available output power of 22.3 W.
引用
收藏
页码：L935 / L937
页数：3
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