Widely tunable single-mode slot waveguide quantum cascade laser array

Widely tunable single-mode slot waveguide quantum cascade laser array

We report designs and experimental demonstrations of a widely tunable single-mode quantum cascade laser array based on slot waveguide structures in the mid-infrared region. The laser array device realized a continuous tuning range of 71 cm-1 from 9.66 μm to 10.37 μm at 300 K only using the current t...

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Bibliographic Details
Main Authors: Li, Jinghao, Sun, Fangyuan, Jin, Yuhao, Chua, Yun Da, Tan, Kian Hua, Wicaksono, Satrio, Sirtori, Carlo, Yoon, Soon Fatt, Wang, Qi Jie
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2022
Subjects:
Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Quantum Cascade Laser
Infrared Devices
Online Access:https://hdl.handle.net/10356/155554
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Institution: Nanyang Technological University
Language: English
Description
Summary:We report designs and experimental demonstrations of a widely tunable single-mode quantum cascade laser array based on slot waveguide structures in the mid-infrared region. The laser array device realized a continuous tuning range of 71 cm-1 from 9.66 μm to 10.37 μm at 300 K only using the current tuning without any external heatsink temperature adjustments, in good agreement with the design. Stable single-mode operations free of undesired mode-hops have been obtained over the whole tuning range. Another slot waveguide QCL array with a 41 cm-1 continuous tuning range around 7.3 μm has also been realized with the same design principle, demonstrating the universal applicability of the array design. The broadly continuous tuning with simple processing makes the array device a suitable candidate for mid-infrared sensing and spectroscopy application.

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