公开(公告)号：EP0563314A4

公开(公告)日：1994-02-16

申请号：EP92904127

申请日：1991-12-18

Applicant: THE BOEING COMPANY

Inventor： BERANEK, MARK, W. ,  CAPRON, BARBARA, A. ,  HUGGINS, RAYMOND, W. ,  GRIFFITH, DAVID, M. ,  LIVEZY, DARRELL, L. ,  TRAYNOR, TIMOTHY

IPC: G01J3/02 ,  G01J3/18 ,  G01J3/20 ,  G01J3/24 ,  G01J3/28 ,  G01J3/36 ,  G01J3/40 ,  G02B6/32 ,  G02B6/34

CPC classification number: G01J3/20 ,  G01J3/02 ,  G01J3/0259 ,  G01J3/24 ,  G01J3/2803 ,  G01J3/36 ,  G01J3/40 ,  G01J2003/1847 ,  G01J2003/2813 ,  G02B6/29328 ,  G02B6/2938 ,  G02B6/32

Abstract: A spectrograph usable as a demutiplexer/detector in a wavelength division multiplexing optical system. The spectrograph comprises a planar waveguide (50) and a detector array (52). The planar waveguide (50) has a dispersive edge (56) having an inwardly concave shape, an input edge (62), and a straight output edge (64). The dispersive edge (56) has a reflective diffraction grating (60) formed on it, the grating (60) having a variable line spacing. An optical input signal comprising a plurality of different wavelength ranges enters the waveguide at the input edge (62), and travels through the waveguide and strikes the grating (60). The grating (60) focuses the optical energy in each of the wavelength ranges at a focal spot at the output edge (64), the position of each focal spot being a function of wavelength. The detector array (52) comprises a plurality of photodetectors positioned along a straight line, such that the photodetectors are positioned at the focal spots. Each photodetector therefore detects the optical energy in one of the input ranges. A stack of such planar waveguides may be assembled to form a multi-channel spectrograph.

Abstract translation: 一种可用作波分复用光学系统中的解复用器/检测器的光谱仪。 光谱仪包括平面波导（50）和探测器阵列（52）。 平面波导（50）具有具有向内凹形状的色散边缘（56），输入边缘（62）和直线输出边缘（64）。 色散边缘（56）具有形成在其上的反射式衍射光栅（60），光栅（60）具有可变的行距。 包括多个不同波长范围的光输入信号在输入边缘（62）处进入波导，并且穿过波导并撞击光栅（60）。 光栅（60）将光能聚焦在输出边缘（64）处的焦斑处的每个波长范围内，每个焦斑的位置是波长的函数。 探测器阵列（52）包括沿着直线设置的多个光电探测器，使得光电探测器位于焦点处。 因此每个光电检测器检测其中一个输入范围内的光能。 一堆这种平面波导可被组装以形成多通道摄谱仪。