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Opt Lett. 2010 Feb 15;35(4):592-4. doi: 10.1364/OL.35.000592.
An experimental demonstration of a moiré reflecting Bragg grating in photo-thermo-refractive glass is carried out. This narrowband filter is obtained by the recording of two reflecting Bragg gratings with different periods. Filters with central wavelength at 1550 nm, bandwidth of 50 pm, and transmission higher than 95% are demonstrated. The methods to decrease bandwidth to 1 pm are finally investigated.
实验演示了在光折变玻璃中莫尔反射布拉格光栅。这种窄带滤波器是通过记录两个具有不同周期的反射布拉格光栅获得的。实验得到了中心波长为 1550nm、带宽为 50pm、透过率高于 95%的滤波器。最后还研究了将带宽降低到 1pm 的方法。
