The Role of Coherent Detection
The Role of Coherent Detection
复制标题
相干检测的作用
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Zmuidzinas
中科院分区：
文献类型：
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作者：
J. Zmuidzinas
许多有趣的天体，如星系、分子云、pdr、恒星形成区、原恒星、演化恒星、行星和彗星，都有丰富的亚毫米光谱。为了避免线混合，并能够分辨线形状，通常需要在高分辨率下测量这些光谱。本文讨论了亚毫米波和远红外高分辨光谱的相干探测和直接探测的相对优势和局限性。原则上，直接检测具有基本的灵敏度优势。在实践中，它是di。鉴于现有探测器的灵敏度和对仪器体积的合理限制，Cult难以实现这一优势。因此，相干探测有望在未来的亚毫米和远红外天体物理学中发挥重要作用。
Many interesting astronomical objects, such as galaxies, molecular clouds, PDRs, star - forming regions, protostars, evolved stars, planets, and comets, have rich submillimeter spectra. In order to avoid line blending, and to be able to resolve the line shape, it is often necessary to measure these spectra at high resolution. This paper discusses the relative advantages and limitations of coherent and direct detection for high resolution spectroscopy in the submillimeter and far - infrared. In principle, direct detection has a fundamental sensitivity advantage. In practice, it is di.cult to realize this advantage given the sensitivities of existing detectors and reasonable constraints on the instrument volume. Thus, coherent detection can be expected to play an important role in submillimeter and far - infrared astrophysics well into the future.