| 单词 | reflection grating |
| 释义 | reflection grating A type of diffraction grating comprising grooves ruled into a surface that can be either plane or concave. In a distributed feedback laser (DFB laser), a diffraction grating with a concave surface serves to focus light without affecting the spectra. This approach is much more effective than the mirror technique employed with a Fabry-Perot laser and vertical cavity surface-emitting laser (VCSEL). See also DFB laser, diffraction, diffraction grating, Fabry-Perot laser, and VCSEL. |
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