Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser

We present a low threshold-current and fast wavelength-tuning external cavity quantum cascade laser (EC-QCL) using a scanning galvanometer in the Littman-Metcalf cavity geometry. The EC-QCL could repeatedly swept at 100 Hz over its full tuning range of about 290 nm (2105 cm(−1) to 2240 cm(−1)), prov...

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Autores principales: Jia, Xuefeng, Wang, Lijun, Jia, Zhiwei, Zhuo, Ning, Zhang, Jinchuan, Zhai, Shenqiang, Liu, Junqi, Liu, Shuman, Liu, Fengqi, Wang, Zhanguo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2018
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6203702/
https://www.ncbi.nlm.nih.gov/pubmed/30367319
http://dx.doi.org/10.1186/s11671-018-2765-1
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author Jia, Xuefeng
Wang, Lijun
Jia, Zhiwei
Zhuo, Ning
Zhang, Jinchuan
Zhai, Shenqiang
Liu, Junqi
Liu, Shuman
Liu, Fengqi
Wang, Zhanguo
author_facet Jia, Xuefeng
Wang, Lijun
Jia, Zhiwei
Zhuo, Ning
Zhang, Jinchuan
Zhai, Shenqiang
Liu, Junqi
Liu, Shuman
Liu, Fengqi
Wang, Zhanguo
author_sort Jia, Xuefeng
collection PubMed
description We present a low threshold-current and fast wavelength-tuning external cavity quantum cascade laser (EC-QCL) using a scanning galvanometer in the Littman-Metcalf cavity geometry. The EC-QCL could repeatedly swept at 100 Hz over its full tuning range of about 290 nm (2105 cm(−1) to 2240 cm(−1)), providing a scan rate of 59.3 μm s(−1). The continuous-wave (CW) threshold current of the EC-QCL was as low as 250 mA and the maximum output power was 20.8 mW at 400 mA for a 3-mm-long QCL gain chip. With a sawtooth wave modulation, a scan resolution of < 0.2 cm(−1) can be achieved within the tuning range. The low power-consumption and fast swept-wavelength EC-QCL will be beneficial to many applications.
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spelling pubmed-62037022018-11-06 Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser Jia, Xuefeng Wang, Lijun Jia, Zhiwei Zhuo, Ning Zhang, Jinchuan Zhai, Shenqiang Liu, Junqi Liu, Shuman Liu, Fengqi Wang, Zhanguo Nanoscale Res Lett Nano Express We present a low threshold-current and fast wavelength-tuning external cavity quantum cascade laser (EC-QCL) using a scanning galvanometer in the Littman-Metcalf cavity geometry. The EC-QCL could repeatedly swept at 100 Hz over its full tuning range of about 290 nm (2105 cm(−1) to 2240 cm(−1)), providing a scan rate of 59.3 μm s(−1). The continuous-wave (CW) threshold current of the EC-QCL was as low as 250 mA and the maximum output power was 20.8 mW at 400 mA for a 3-mm-long QCL gain chip. With a sawtooth wave modulation, a scan resolution of < 0.2 cm(−1) can be achieved within the tuning range. The low power-consumption and fast swept-wavelength EC-QCL will be beneficial to many applications. Springer US 2018-10-26 /pmc/articles/PMC6203702/ /pubmed/30367319 http://dx.doi.org/10.1186/s11671-018-2765-1 Text en © The Author(s). 2018 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Nano Express
Jia, Xuefeng
Wang, Lijun
Jia, Zhiwei
Zhuo, Ning
Zhang, Jinchuan
Zhai, Shenqiang
Liu, Junqi
Liu, Shuman
Liu, Fengqi
Wang, Zhanguo
Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser
title Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser
title_full Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser
title_fullStr Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser
title_full_unstemmed Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser
title_short Fast Swept-Wavelength, Low Threshold-Current, Continuous-Wave External Cavity Quantum Cascade Laser
title_sort fast swept-wavelength, low threshold-current, continuous-wave external cavity quantum cascade laser
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6203702/
https://www.ncbi.nlm.nih.gov/pubmed/30367319
http://dx.doi.org/10.1186/s11671-018-2765-1
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