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Invention Application
WO2003083411A1 MULTIPLE EMITTER BORESIGHT REFERENCE SOURCE 审中-公开
多发射体波长参考源

  • Patent Title: MULTIPLE EMITTER BORESIGHT REFERENCE SOURCE
  • Patent Title (中): 多发射体波长参考源
  • Application No.: PCT/US2003/007154
    Application Date: 2003-03-10
  • Publication No.: WO2003083411A1
    Publication Date: 2003-10-09
  • Inventor: BYREN, Robert, W. , ARNN, Edward, L.
  • Applicant: RAYTHEON COMPANY
  • Applicant Address: 2000 East El Segundo Boulevard, P.O. Box 902, El Segundo, CA 90245 US
  • Assignee: RAYTHEON COMPANY
  • Current Assignee: RAYTHEON COMPANY
  • Current Assignee Address: 2000 East El Segundo Boulevard, P.O. Box 902, El Segundo, CA 90245 US
  • Agency: RAUFER, Colin, M.
  • Priority: US10/099,706 20020314
  • Main IPC: G01B11/26
  • IPC: G01B11/26
MULTIPLE EMITTER BORESIGHT REFERENCE SOURCE
Abstract:
An efficient multi-emitter boresight reference source (12). The efficient reference source (12) includes a first mechanism (182) for transmitting a first portion of electromagnetic energy (184) within a first waveband. A second mechanism (186) transmits a second portion of electromagnetic energy (188) within a second waveband different than the first waveband. A third mechanism (148) for combining the first portion of electromagnetic energy and the second portion of electromagnetic energy to yield a uniform reference beam (28). In a specific embodiment, the first mechanism (182) includes a first emitting structure (182), and the second mechanism (186) includes a second emitting structure (186). The first emitting structure (182) and the second emitting structure (186) are semiconductor laser emitting structures. The first waveband (184) and second waveband (188) correspond to wavebands of one or more sensors employing the boresight reference source (12) for beam­alignment purposes. The wavebands (184, 188) include visible and/or infrared portions of the electromagnetic spectrum. The first waveband (184) and second waveband (188) are sufficiently different to eliminate undesirable coupling between first and second laser cavities (182, 186) associated with the first and second emitting structures (182, 186), respectively. The uniform reference beam (28) is a collimated, co-aligned, and multi-spectral reference beam (28), and at least one of the first and second emitting structures (182, 186) includes a Quantum Cascade Laser (QCL) emitting structure. The first emitting structure (182) includes multiple QCL repeat units within a common waveguide region of the first emitting structure (182). The multiple QCL repeat units have different superlattice compositions and/or quantum well thickness, sufficient to cause the first emitting structure (182) to operate at different wavelengths to enhance uniformity of the uniform reference beam (28). The multiple QCL repeat units may also be identical repeat units operating at different temperatures to generate different center wavelengths within each waveband (184, 188). Alternatively, the first emittting structure (182) includes multiple identical QCL
Abstract(Chinese):

一种高效的多发射器视轴参考源（12）。 有效参考源（12）包括用于在第一波段内传输第一部分电磁能（184）的第一机构（182）。 第二机构（186）在不同于第一波段的第二波段内传输电磁能量（188）的第二部分。 一种用于组合第一部分电磁能量和第二部分电磁能量以产生均匀参考光束（28）的第三机构（148）。 在具体实施例中，第一机构（182）包括第一发射结构（182），第二机构（186）包括第二发射结构（186）。 第一发光结构（182）和第二发光结构（186）是半导体激光发射结构。 第一波段（184）和第二波段（188）对应于采用视轴参考源（12）的一个或多个传感器用于波束对准目的的波段。 波段（184,188）包括电磁光谱的可见和/或红外部分。 第一波段（184）和第二波段（188）足够不同，以分别消除与第一和第二发射结构（182,186）相关联的第一和第二激光腔（182,186）之间的不期望的耦合。 均匀参考光束（28）是准直的，共对齐的和多光谱参考光束（28），并且第一和第二发射结构（182,186）中的至少一个包括发射的量子级联激光器（QCL） 结构体。 第一发射结构（182）在第一发射结构（182）的公共波导区域内包括多个QCL重复单元。 多个QCL重复单元具有不同的超晶格组成和/或量子阱厚度，足以使第一发射结构（182）在不同波长下操作以增强均匀参考光束（28）的均匀性。 多个QCL重复单元也可以是在不同温度下工作的相同的重复单元，以在每个波段（184,188）内产生不同的中心波长。 或者，第一发射结构（182）包括多个相同的QCL

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