新型体全息窄带滤光器的光学特性研究

Study on optical properties of novel volume holographic notch filter

用紫外/可见分光光度计测定由DCG记录的透射式体全息窄带带阻滤光器的光谱特性,分析其滤波特性。测量结果分析表明,滤光器有较窄的带宽,其半宽度小于13nm,1/10宽度小于19nm。在400-800nm可见光区域,对其主谱线的相对透过率小于2%,其它谱线的相对透过率大于85%。对半导体泵浦激光器主谱线532.0nm有优良的滤光特性。

Measurements were carried out on th e spectral properties of the transmi ssion volume holo -graphic north DCG filter using an ult raviolet /visible transmittance sp ectrometer.The experimental results show that the filter has a narrow bandwidth,a half -bandwidth less than 13nm,and 1/10width of the bandwidth is less than 19nm.The relative transmittance of ma in spectrum of this filter is less than 2%in the visible region b etween 400nm and 800nm,and,the rela tive transmittance of other spectra are more than 85%.The r esults indicate that this new kind of filter has an excellent filter characteristic to the main sp ectrum of LD -pumped laser at the wavelength of 532.0nm.