Mid-infrared quantum cascade lasers

Because the operating wavelength of quantum cascade lasers (QCL) can cover Mid-infrared to terahertz wavelengths, they have a wide range of applications in the fields of Astronomical research, remote chemical sensing, security surveillance, secret military weapons detection, spectroscopy, and free s...

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Main Author: Chen, Tuoyang
Other Authors: Wang Qijie
Format: Thesis-Master by Coursework
Language:English
Published: Nanyang Technological University 2021
Subjects:
Online Access:https://hdl.handle.net/10356/152591
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1525912023-07-04T17:40:52Z Mid-infrared quantum cascade lasers Chen, Tuoyang Wang Qijie School of Electrical and Electronic Engineering SARC qjwang@ntu.edu.sg Engineering::Electrical and electronic engineering Because the operating wavelength of quantum cascade lasers (QCL) can cover Mid-infrared to terahertz wavelengths, they have a wide range of applications in the fields of Astronomical research, remote chemical sensing, security surveillance, secret military weapons detection, spectroscopy, and free space communication. Since its introduction in 1994, quantum cascade lasers have evolved from the initial laboratory principle devices to the most promising semiconductor lasers in the infrared band for practical use. In this dissertation, after describing some important theories involved in QCL, the manufacturing processes of two types of QCLs, Ridge QCL and Slot QCL, are described in detail. A typical light intensity-current-voltage (LIV) curve of ridge cavity QCL was achieved. By applying the improved structure of two isolated facet phase sections, the slot QCL realized a single-mode tuning around 10 μm with good Side Mode Suppression Ratio (SMSR) at room temperature. Finally, the contents of this paper are summarized, and future research is anticipated. Keywords: Mid Infrared, Quantum Cascade Laser, Ridge QCL, Slot QCL Master of Science (Electronics) 2021-09-02T00:59:44Z 2021-09-02T00:59:44Z 2021 Thesis-Master by Coursework Chen, T. (2021). Mid-infrared quantum cascade lasers. Master's thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/152591 https://hdl.handle.net/10356/152591 en application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
spellingShingle Engineering::Electrical and electronic engineering
Chen, Tuoyang
Mid-infrared quantum cascade lasers
description Because the operating wavelength of quantum cascade lasers (QCL) can cover Mid-infrared to terahertz wavelengths, they have a wide range of applications in the fields of Astronomical research, remote chemical sensing, security surveillance, secret military weapons detection, spectroscopy, and free space communication. Since its introduction in 1994, quantum cascade lasers have evolved from the initial laboratory principle devices to the most promising semiconductor lasers in the infrared band for practical use. In this dissertation, after describing some important theories involved in QCL, the manufacturing processes of two types of QCLs, Ridge QCL and Slot QCL, are described in detail. A typical light intensity-current-voltage (LIV) curve of ridge cavity QCL was achieved. By applying the improved structure of two isolated facet phase sections, the slot QCL realized a single-mode tuning around 10 μm with good Side Mode Suppression Ratio (SMSR) at room temperature. Finally, the contents of this paper are summarized, and future research is anticipated. Keywords: Mid Infrared, Quantum Cascade Laser, Ridge QCL, Slot QCL
author2 Wang Qijie
author_facet Wang Qijie
Chen, Tuoyang
format Thesis-Master by Coursework
author Chen, Tuoyang
author_sort Chen, Tuoyang
title Mid-infrared quantum cascade lasers
title_short Mid-infrared quantum cascade lasers
title_full Mid-infrared quantum cascade lasers
title_fullStr Mid-infrared quantum cascade lasers
title_full_unstemmed Mid-infrared quantum cascade lasers
title_sort mid-infrared quantum cascade lasers
publisher Nanyang Technological University
publishDate 2021
url https://hdl.handle.net/10356/152591
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