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首页> 外文学位 >Demonstration of mid-infrared equilateral-triangle-resonator lasers.
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Demonstration of mid-infrared equilateral-triangle-resonator lasers.

机译：演示中红外等边三角形谐振器激光器。

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摘要

As a worldwide issue, air pollution has a substantial impact on everyday human life. There are surging demands for convenient ways of detecting pollution gases. Tunable diode laser absorption spectroscopy (TDLAS), operating in the mid-infrared region, is gaining increasing attention for pollution detection because of its high sensitivity and fast response. However, the lack of tunable single-mode mid-infrared lasers has delayed the development of TDLAS techniques. In this research, a novel cavity of equilateral-triangle-resonator (ETR) laser structure is investigated for the development of a tunable single-mode mid-infrared laser.; GaSb-based InGaAsSb materials are used for the laser active region material because of their excellent performance in the 2.0-3.0 mum wavelength range, which corresponds to one of the trace gas detection windows. InGaAsSb lasers at long wavelengths face the problem of performance degradation attributed to poor carrier confinement in the active region. Based on theoretical modeling, high Al-content AlGaAsSb layers are used as the barrier layer to overcome this problem. Fabricated 2.8 mum InGaAsSb laser diodes with an optimal active region design demonstrate improved performance and realize continuous-wave operation at room temperature. Long wavelength InGaAsSb lasers are demonstrated in pulsed mode up to 3.12 mum at room temperature, which is very close to the latest world record.; Mid-infrared ETR microlasers are fabricated on a GaSb-based InGaAsSb laser structure using processing techniques of photolithography and inductively coupled plasma etching. A 1.9 mum single-mode ETR microlaser is demonstrated operating continuous-wave at 77 K for the first time in the world. The peak wavelength of the single-mode laser emission is successfully tuned continuously over 3.2 nm. This device serves as a prototype to study the feasibility of the ETR cavity structure for the development of the tunable single-mode mid-infrared lasers for gas sensing applications.
机译：空气污染已成为世界性问题，对人类的日常生活产生了重大影响。对检测污染气体的简便方法的需求日益增加。可调谐二极管激光吸收光谱法（TDLAS）在中红外区域运行，由于其高灵敏度和快速响应，因此越来越受到污染检测的关注。但是，由于缺少可调谐的单模中红外激光器，已经延迟了TDLAS技术的发展。在这项研究中，研究了一种新型的等边三角形谐振腔（ETR）激光器结构，用于开发可调谐单模中红外激光器。基于GaSb的InGaAsSb材料用于激光有源区材料，是因为它们在2.0-3.0微米波长范围内具有出色的性能，该波长范围对应于痕量气体检测窗口之一。长波长的InGaAsSb激光器面临着由于有源区中的载流子约束不良而导致的性能下降的问题。基于理论建模，高Al含量的AlGaAsSb层用作阻挡层以克服此问题。制造的2.8微米InGaAsSb激光二极管具有最佳的有源区设计，具有更高的性能，并在室温下实现了连续波操作。在室温下以脉冲模式演示了长波长InGaAsSb激光器，最高可达3.12微米，非常接近最新的世界纪录。使用光刻和感应耦合等离子体刻蚀技术在基于GaSb的InGaAsSb激光器结构上制造中红外ETR微激光器。 1.9毫米单模ETR微激光在世界上首次以77 K的连续波运行。单模激光发射的峰值波长已成功地在3.2 nm范围内连续调谐。该设备用作研究ETR腔结构在开发用于气体传感应用的可调单模中红外激光器方面的可行性的原型。

著录项

  • 作者

    Cao, Yong.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 126 p.
  • 总页数 126
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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