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journal article·2025-08-01Open access

Chirped InAs/InP quantum dot material platform enabling ultra-broad spectral tuning in external cavity lasers

Hengbo Sun, Lijun Hao, Yong Zhao

AIP Advances· Volume 15· Issue 8
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Source abstract

Abstract

We demonstrate a novel ultra-broadband tunable InAs/InP quantum dot (QD) external-cavity laser incorporating a chirped multilayer QD active region. By engineering the epitaxial material to feature chirped quantum dot layers, we broaden the photoluminescence spectrum. The influence of cavity length and facet coating conditions on the tuning range is also systematically investigated, enabling optimization of the laser’s spectral performance. Under an injection current of 1.5 A and using an anti-reflective (AR, R ≈ 0%)/high-reflective (HR, R ≈ 85%) facet coating configuration, a continuous tuning bandwidth of 160 nm spanning 1430–1590 nm is achieved. This result provides a promising route for next-generation broadband optical communication systems, high-resolution spectroscopy, and precision optical imaging technologies.
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Research context

OpenAlex topics: Semiconductor Lasers and Optical Devices · Photonic and Optical Devices · Optical Coherence Tomography Applications

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Affiliations

School of Mathematical and Physical Sciences, Nanjing Tech University 1 , Nanjing, Jiangsu 211816,

Jiangsu Huaxing Laser Technology Co., Ltd. 2 , Room 701, Dongfang Guomao Building, Fuzhou Road, Pizhou, Jiangsu 221300,

School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University 3 , Wuxi 214122,

Funding

National Natural Science Foundation of China · Natural Science Foundation of the Jiangsu Higher Education Institution of China · Industry-University Collaborative Education Program, Ministry of Education, China

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