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

被引：29

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.

引用

页数：6