GOALI: Widely Tunable Gasb-Based Diode Lasers for Spectroscopy

GOALI：可广泛调谐的用于光谱的GaSb基半导体激光器该计划的目标是满足当前工业对用于光谱应用的紧凑、高效的中红外激光光源的需求。我们将设计和开发衍射受限的GaSb基二极管激光器，该激光器具有超宽的增益谱，适合直接集成到外腔中。拟议的设备应用包括：炼油厂和管道附近的气体泄漏监测，地下煤矿内的甲烷控制等。这些新设备可用于研究大气中的化学和辐射传输过程，控制温室气体，研究海洋环境和行星研究。根据工业伙伴的设想，用于光谱应用的可调谐激光光源具有很大的商业兴趣。新型激光器将被用于开发商业产品的原型。制作的器件的测试将由石溪大学的学生参与。这项工作将涉及设计一种具有工程化子带结构的具有三层量子阱有源区的新型二极管激光器。在室温下发射的光谱范围从3.1微米到3.4微米的器件将被送到工业合作者进行芯片贴合测试。安装的设备将通过光学测量进行广泛的表征。基于具有宽光增益谱的三层量子阱为有源区设计了不同异质结构的半导体激光器，并对其进行了表征。利用级联泵浦将阈值电流降到最低，以实现在3-4微米光谱范围内的室温工作。建议的工作将包括设计和开发针对锑系异质结构进行优化的超低反射光学薄膜。基于GaSb的半导体激光技术将可用于家庭安全和商业部门的光谱应用。

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.