GOALI: Widely Tunable Gasb-Based Diode Lasers for Spectroscopy

目标：用于光谱学的广泛可调谐镓基二极管激光器该计划的目标是解决当前工业对用于光谱学应用的紧凑高效中红外激光源的需求。将设计和开发由DayLight Solutions的工业合作者开发的具有超宽增益光谱的衍射限制的基于gasb的二极管激光器，适用于直接集成到外部腔中。该装置的应用包括：炼油厂和管道附近的气体泄漏监测，地下煤矿的甲烷控制等。这些新装置可用于研究大气中的化学和辐射转移过程、控制温室气体、海洋环境研究和行星研究。正如工业合作伙伴所设想的那样，光谱应用的可调谐激光源具有重要的商业利益。新型激光器将用于商业产品原型的开发。在石溪大学学生的参与下，将对制造的设备进行测试。这项工作将涉及设计一种新型的三层量子阱有源区和工程化子带结构的二极管激光器。在室温下，在3.1至3.4微米光谱区域内发射的器件将被发送给工业合作伙伴进行贴模测试。安装的设备将通过光学测量广泛表征。本文将制备具有宽增益光谱的三层量子阱有源区不同异质结构的二极管激光器。级联泵浦将用于最小化阈值电流，以在3至4µm的光谱区域实现室温操作。提出的努力将包括设计和开发针对锑基异质结构优化的超低反射光学涂层。基于gasb的二极管激光技术将可用于家庭安全和商业领域的光谱应用。

GOALI: Widely Tunable GaSb-based Diode Lasers for SpectroscopyThe objective of this program is to address the current industrial need for compact efficient mid-infrared laser sources for spectroscopic applications. Diffraction limited GaSb-based diode lasers with extra-broad gain spectra suitable for direct integration into external cavity state-of-the-art spectroscopic systems developed by industrial collaborators at DayLight Solutions will be designed and developed. The proposed device applications include: gas leak monitoring in refineries and near the pipe lines, methane control inside underground coal mines and others. The new devices can be used for studies of chemical and radiation transfer processes in atmosphere, control of greenhouse gasses, for studies of marine environments and planetary research. There is significant commercial interest in tunable laser sources for spectroscopic applications as envisioned by industrial partner. Novel lasers will be utilized for development of the prototypes of the commercial products. The testing of the fabricated devices will be performed with participation of Stony Brook University students.This work will involve the design of a novel type of diode lasers with triple layer quantum well active region with engineered subband structure. Devices emitting in spectral region from 3.1 to 3.4 microns at room temperature will be sent to the industrial collaborator to perform die-attach tests. The mounted devices will be extensively characterized via optical measurements. Diode lasers with different heterostructure designs for the active region based on triple layer quantum wells having wide optical gain spectra will be fabricated and characterized. Cascade pumping will be utilized to minimize threshold current to achieve room temperature operation in the spectral region from 3 to 4 µm. The proposed efforts will include the design and development of ultra-low-reflection optical coatings optimized for antimonide-based heterostructures. The GaSb-based diode laser technology will be available for spectroscopic applications in home security and commercial sectors.