External cavity feedback laser diode bar with narrow bandwidth and good beam quality

su zhouping; zhao yanli; lou qihong; zhou jun

Volume 22 Issue 10

Sep. 2010

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Article Navigation > High Power Laser and Particle Beams > 2010 > 22(10): 0-

li lin-bo, yang jian-lun, zhong yao-hua, et al. 1-D axial X-ray power distribution of wire-array implosions[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

su zhouping, zhao yanli, lou qihong, et al. External cavity feedback laser diode bar with narrow bandwidth and good beam quality[J]. High Power Laser and Particle Beams, 2010, 22.

li lin-bo, yang jian-lun, zhong yao-hua, et al. 1-D axial X-ray power distribution of wire-array implosions[J]. High Power Laser and Particle Beams, 2007, 19.

Citation:

su zhouping, zhao yanli, lou qihong, et al. External cavity feedback laser diode bar with narrow bandwidth and good beam quality[J]. High Power Laser and Particle Beams, 2010, 22.

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External cavity feedback laser diode bar with narrow bandwidth and good beam quality

1.
School of Science,Jiangnan University,Wuxi 214122,China;
2.
Wuxi Zhongxing Optoelectronics Technology Co.Ltd.,Wuxi 214028,China;
3.
Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China

Publish Date: 2010-09-03

Abstract

Abstract

An off-axis external cavity with double feedback is designed to simultaneously reduce spectral bandwidth and improve the beam quality of the laser diode bar. The external cavity is made up of a high-reflection mirror and a blazed grating, where the selected spatial mode can be amplified. The grating can also provide a spectral-sensitive feedback to the laser diode bar. In addition, a half-wave plate is inserted into the grating-feedback branch to control the feedback light amount, and the output laser is taken from the grating-feedback branch. The bandwidth and the beam parameter product are respectively reduced to 0.15 nm and 283 mm·mrad for laser diode bar with the external cavity at a drive current of 16 A. The center wavelength is almost unchanged as the temperature varies, the laser
- laser diode bar,
- external cavity,
- beam parameter product,
- linewidth

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