Single-mode, high-power, mid- infrared, quantum cascade laser phased arrays

被引：23
|
作者：
Zhou, Wenjia [1 ]
Wu, Donghai [1 ]
Lu, Quan-Yong [1 ]
Slivken, Steven [1 ]
Razeghi, Manijeh [1 ]
机构：
[1] Northwestern Univ, Ctr Quantum Devices, Dept Elect Engn & Comp Sci, Evanston, IL USA
来源：
SCIENTIFIC REPORTS | 2018年 / 8卷
关键词：
SILICON;
D O I：
10.1038/s41598-018-33024-7
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We demonstrate single-mode, 16-channel, optical phased arrays based on quantum cascade laser technology, with emission wavelengths around 4.8 mu m. The integrated device consists of a distributed feedback seed section, a highly-efficient tree array multi-mode interferometer power splitter, and a 16-channel amplifier array with a 4 degrees angled facet termination. With a single layer Y2O3 coating, the angled facet reflectivity is estimated to be less than 0.1% for suppressing amplifier self-lasing. A peak output power of 30W is achieved with an emission spectrum narrower than 11 nm and a side mode suppression ratio over 25 dB. Far field distribution measurement result indicates a uniform phase distribution across the array output. Using the same phased array architecture, we also demonstrate single-mode 3.8 mu m QCL amplifier arrays with up to 20W output power.
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页数：6
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