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    • 9. 发明授权
    • Optical spectrum analyzer
    • 光谱分析仪
    • US06343170B1
    • 2002-01-29
    • US09780466
    • 2001-02-12
    • Ilan Sela
    • Ilan Sela
    • G02B634
    • G02B6/29307G01J3/0256G01J3/0259G01J3/18G02B6/29311
    • An optical spectrum analyzer and methods for its use for multiplexing and demultiplexing. The optical spectrum analyzer includes two reflectors in a fixed spatial relationship to a volume phase grating. Input light is reflected by the first reflector to the volume phase grating, diffracted by the volume phase grating towards the second reflector along a first optical path, reflected back to the volume phase grating by the second reflector along a second optical path distinct from the first optical path, diffracted again by the volume phase grating towards the first reflector, and reflected out of the optical spectrum analyzer by the first reflector. Preferably, the reflectors are surfaces of transparent blocks that are optically coupled to the volume phase grating. The reflectors are arranged so that light of a plurality of equally spaced wavelengths, that is input to the optical spectrum analyzer at a single entry point, is demultiplexed to a corresponding plurality of equally spaced exit points. Conversely, individual equally spaced wavelengths, that are input at respective equally spaced entry points, are multiplexed to exit at a common exit point.
    • 一种光谱分析仪及其用于复用和解复用的方法。 光谱分析仪包括与体积相位光栅固定空间关系的两个反射器。 输入光被第一反射器反射到体积相位光栅,沿着第一光路被体积相位光栅衍射到第二反射器,由第二反射器沿着与第一反射器不同的第二光路反射回体积相位光栅 光路,被体积相位光栅再次衍射到第一反射器,并由第一反射器反射出光谱分析仪。 优选地,反射器是光学耦合到体积相位光栅的透明块的表面。 反射器被布置成使得在单个入口点处输入到光谱分析器的多个相等间隔的波长的光被解复用到相应的多个等间隔的出口点。 相反,在相应等间隔的入口点处输入的各个等间隔的波长被多路复用以在共同出口点处退出。