发射波长4.5 μm的低阈值gasb带间级联激光器

IF 2.5 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-09-11 DOI:10.1109/LPT.2025.3609298

Wenxiang Huang;Shiyu Hu;Junjie Tu;Peng Wang;Wenquan Ma;Yanhua Zhang;Jianliang Huang

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引用次数: 0

摘要

我们提出了一种低阈值的高性能带间级联激光器（ICLs），在室温（RT）下发射功率为4.5~\mu$ m。广域ICL器件的RT阈值输入功率密度为782 W/cm ${}^{\mathbf{2}}$，阈值电流密度为163 a /cm ${}}^{\mathbf{2}}$，大大低于发射波长超过$4\mu$ m的ICL的先前记录220 a /cm ${}^{\mathbf{2}}$。对于连续波（CW）工作，具有向下安装和背面高反射涂层的窄脊器件。在$20~ ${\circ}$ C时，阈值电流和功率密度分别为220 A/cm ${}^{\mathbf{2}}$和1056 W/cm ${}^{\mathbf{2}}$，在相同温度下输出的最大功率为33 mW。同样的窄脊器件也在连续模式下工作，温度高达$78~^{\circ}$ C，比先前报道的ICLs在超过$4~\mu$ m波长区域的最高工作温度高$12~^{\circ}$ C。

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Low-Threshold GaSb-Based Interband Cascade Lasers Emitting at 4.5 μm

We present low-threshold high-performance interband cascade lasers (ICLs) emitting at

$4.5~\mu$

m at room temperature (RT). The broad-area ICL device had a RT threshold input power density of 782 W/cm

${}^{\mathbf {2}}$

and a threshold current density of 163 A/cm

${}^{\mathbf {2}}$

that is substantially lower than the previous record of 220 A/cm

${}^{\mathbf {2}}$

for ICLs with emitting wavelengths beyond

$4\mu$

m. For continuous-wave (CW) operation, the narrow-ridge device with epi-down mounting and a high-reflection coating on the back facet, exhibited threshold current and power densities of only 220 A/cm

${}^{\mathbf {2}}$

and 1056 W/cm

${}^{\mathbf {2}}$

$20~^{\circ }$

C, respectively, and delivered a maximum power of 33 mW at the same temperature. The same narrow-ridge device also operated in CW mode at temperatures up to

$78~^{\circ }$

C, which is

$12~^{\circ }$

C higher than the previously reported maximum operating temperature for ICLs in the wavelength region beyond

$4~\mu$

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来源期刊

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.