| 摘要 |
A wavelength selective detector, method of manufacture, and method of operation are disclosed. The wavelength selective detector includes an etalon, first and second collimating optical elements, and first and second optical detectors. The etalon has first and second surfaces, which are substantially parallel. The first collimating optical element has a first focal length to substantially collimate, within the etalon, a first portion of light from a light source. The second collimating optical element has a second focal length, shorter than the first focal length, to substantially collimate, within the etalon, a second portion of light from the light source. The first and second optically collimating optical elements are coupled to first and second optics portions of the first surface of the etalon, respectively. The first and second optical detectors are configured to receive the first and second portions of light, respectively, after they pass through the etalon.
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