Negative differential resistance in InP/AlGaInAs laser diodes under continuous current stress

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-05-15 DOI:10.1016/j.optlastec.2025.113196

Zhengqun Xue , Bingkun Chi , Yuping Chen

引用次数: 0

Abstract

We investigate the negative differential resistance (NDR) in InP/AlGaInAs laser diodes under continuous current stress. Experiments conducted on 1550 nm distributed feedback (DFB) lasers reveal significant performance degradation as the devices approach or exhibit NDR. The primary mechanism underlying these changes is attributed to the initiation of intrinsic conduction in quantum well layers which has the highest operating temperatures, lowest doping levels, and narrowest bandgaps. This process leads to operating voltage saturation and reduction, as well as irreversible degradation of the active region. Following the onset of NDR, increased impurity and defect densities in the active region elevate the current that induced the NDR again. The similar phenomena were also observed in 1310 nm InP/AlGaInAs Fabry-Perot (FP) lasers. These findings provide crucial basis for further research and improvement in the reliability of lasers at high currents, as well as defining their safe operating current range.

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连续电流应力下InP/AlGaInAs激光二极管的负差分电阻

研究了连续电流应力下InP/AlGaInAs激光二极管的负差分电阻（NDR）。在1550 nm分布反馈（DFB）激光器上进行的实验表明，当器件接近或表现出NDR时，性能会显著下降。这些变化的主要机制归因于具有最高工作温度、最低掺杂水平和最窄带隙的量子阱层中本征传导的启动。这一过程导致工作电压饱和和降低，以及有源区域的不可逆退化。在NDR发生后，有源区杂质和缺陷密度的增加提高了再次诱发NDR的电流。在1310 nm的InP/AlGaInAs Fabry-Perot （FP）激光器中也观察到类似的现象。这些发现为进一步研究和提高激光器在大电流下的可靠性以及确定其安全工作电流范围提供了重要的基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems