標題: | High-power and single-mode VCSEL arrays with single-polarized outputs by using package-induced tensile strain |
作者: | Shi, Jin-Wei Khan, Zuhaib Horng, Ray-Hua Yeh, Hsiao-Yun Huang, Chun-Kai Liu, Cheng-Yi Shih, Jie-Chen Chang, Yung-Hao Yen, Jia-Liang Sheu, Jinn-Kong 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
公開日期: | 1-九月-2020 |
摘要: | In this work, we demonstrate a novel high-power vertical-cavity surface-emitting laser (VCSEL) array with highly single-mode (SM) and single-polarized output performance without significantly increasing the intra-cavity loss and threshold current (Ith). By combining a low-loss zinc-diffusion aperture with an electroplated copper substrate, we can obtain a highly SM output (side mode suppression ratio >50 dB) with a wry narrow divergence angle (1 / e(2) : similar to 10 degrees) under high output power (3.1 W; 1% duty cycle) and sustain a single polarization state, with a polarization suppression ratio of around 9 dB, under the full range of bias currents. Compared to the reference device without the copper substrate, the demonstrated array can not only switch the output optical spectra from quasi-SM to highly SM but also maintain a close threshold current value (Ith: 0.8 versus 0.7 mA per unit device) and slope efficiency. The enhancement in fundamental mode selectivity of our VCSEL structure can be attributed to the single-polarized lasing mode induced by tensile strain, which is caused by the electroplated copper substrate, as verified by the double-crystal x-ray measurement results. (C) 2020 Optical Society of America |
URI: | http://dx.doi.org/10.1364/OL.398896 http://hdl.handle.net/11536/155312 |
ISSN: | 0146-9592 |
DOI: | 10.1364/OL.398896 |
期刊: | OPTICS LETTERS |
Volume: | 45 |
Issue: | 17 |
起始頁: | 4839 |
結束頁: | 4842 |
顯示於類別: | 期刊論文 |