Injection-insensitive lateral divergence in broad-area diode lasers achieved by spatial current modulation

High-power broad-area (BA) diode lasers often suffer from low beam quality, broad linewidth, and a widened slow-axis far field with increasing current. In this paper, a two-dimensional current-modulated structure is proposed and it is demonstrated that it can reduce not only the far-field sensitivit...

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Bibliographic Details
Published in:Applied physics express 2016-11, Vol.9 (11), p.112102
Main Authors: Wang, Tao, Tong, Cunzhu, Wang, Lijie, Zeng, Yugang, Tian, Sicong, Shu, Shili, Zhang, Jian, Wang, Lijun
Format: Article
Language:English
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Summary:High-power broad-area (BA) diode lasers often suffer from low beam quality, broad linewidth, and a widened slow-axis far field with increasing current. In this paper, a two-dimensional current-modulated structure is proposed and it is demonstrated that it can reduce not only the far-field sensitivity to the injection current but also the linewidth of the lasing spectra. Injection-insensitive lateral divergence was realized, and the beam parameter product (BPP) was improved by 36.5%. At the same time, the linewidth was decreased by about 45% without significant degradations of emission power and conversion efficiency.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.9.112102