Work

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

Year: 2025

Type: article

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.

Source: AIP Advances

DOI: 10.1063/5.0276733

Authors: Hengbo Sun, Lijun Hao, Yong Zhao

Institutions: Nanjing Tech University, Jiangnan University

Language: English

Topic: Semiconductor Lasers and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,350

Funder: National Natural Science Foundation of China