Author:
Yang Pengchang,Zhang Jinchuan,Gu Zenghui,Liu Chuanwei,Zhao Yue,Cheng Fengmin,Zhai Shenqiang,Zhuo Ning,Liu Junqi,Wang Lijun,Liu Shuman,Liu Fengqi
Abstract
Abstract
In this work, we demonstrated high-power quantum cascade laser (QCL) arrays lasing at λ ~ 5 µm by employing an optimized coupled-ridge waveguide (CRW) structure. Five-element QCL arrays were simulated and fabricated through a two-step etching method to extend the CRW structure to a mid-wave infrared regime. A lateral far-field with the main peak near a diffraction-limited intensity curve of about 10° was observed by properly designing a geometric shape of the ridges and interspaces. By introducing a buried 2nd-order distributed feedback (DFB) grating, substrate emission with a radiation power above 1 W at 25 °C is achieved. Single longitudinal mode operation is obtained by changing the temperature of the heatsink with a good linear wavelength tuning coefficient of –0.2 cm–1/K.
Subject
Materials Chemistry,Electrical and Electronic Engineering,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Reference17 articles.
1. High power, continuous wave, quantum cascade ring laser;Bai;Appl Phys Lett,2011
2. High power, widely tunable, mode-hop free, continuous wave external cavity quantum cascade laser for multi-species trace gas detection;Centeno;Appl Phys Lett,2014
3. High power continuous operation of a widely tunable quantum cascade laser with an integrated amplifier;Slivken;Appl Phys Lett,2015
4. High power broad area quantum cascade lasers;Bai;Appl Phys Lett,2009
5. Electrically pumped photonic crystal distributed feedback quantum cascade lasers;Bai;Appl Phys Lett,2007
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献