CAJ | 학술논문

介绍了一种对488 nm蓝光和632.8 nm红光均敏感的双色非水溶性光致聚合物制成的二重全息光栅.理论分析得出此光栅的分辨率＞5 000 line/mm,温度变化时中心波长的漂移几乎为零.实验仪器测得光栅的衍射效率最高达到90%以上,而且该光栅具有成本低和一次成型的优点,适合制作波分复用器.与单波长的二重光栅相比,它解决了由于光的相干性出现的串扰问题,串扰更小,所以在制作光栅时两束光不但可以选择角度入射也可以选择平行入射,同时具有良好的波长选择性和角度选择性.
개소료일충대488 nm람광화632.8 nm홍광균민감적쌍색비수용성광치취합물제성적이중전식광책.이론분석득출차광책적분변솔＞5 000 line/mm,온도변화시중심파장적표이궤호위령.실험의기측득광책적연사효솔최고체도90%이상,이차해광책구유성본저화일차성형적우점,괄합제작파분복용기.여단파장적이중광책상비,타해결료유우광적상간성출현적천우문제,천우경소,소이재제작광책시량속광불단가이선택각도입사야가이선택평행입사,동시구유량호적파장선택성화각도선택성.
The double-layer holographic grating made of a new kind of water-resisting photopolymer which is sensitive to the blue light of 488 nm and red light of 632.8 nm is introduced. Based on the experimental data and theoretical analysis, the characteristics of the material are investigated. The analysis shows that the resolution of this grating is above 5 000 line/mm and its diffraction efficiency is above 90%. The central wavelength drifting of the grating is nearly zero when temperature changes. The grating has many merits, such as one-step forming, low loss, etc. The double-layer holographic grating is suitable for fabricating the wavelength-division multiplexer. The crosstalk question caused by the light coherence has been solved by the technology, and the crosstalk is smaller in comparison with the single-wavelength double-layer grating. During the production of the grating, two incident modes of beam can be chosen arbitrarily, which is oblique incidence and parallel incidence. It has the characteristics of wavelength selection and angle selection.