利用体相位全息光栅的优良特性,研制光栅式密集型波分复用器(DWDM)。准直后的信道波长通过体相位全息光栅两次衍射,在焦面上实现信道波长的分复用。阐述了体相位全息光栅的独特结构特点,给出了体相位全息光栅式密集型光波分复用器件的原理图,计算出各个信道的位置及间隔,用Zemax仿真出设计模型。相比于薄膜滤光片式器件而言,具有许多独特的优良特性,能够实现更密集更多信道数量的分复用。 Utilizing the excellent characteristics of volume phase holographic gratings, a grating-type DWDM is developed. The collimated channel wavelength is diffracted twice by the bulk phase holographic grating, and the channel wavelength is multiplexed on the focal plane. The unique structure characteristics of volume phase holographic gratings are expounded. The principle diagram of bulk phase holographic grating DWDM devices is given. The position and spacing of each channel are calculated, and the design model is simulated with Zemax. Compared with the thin film filter device, it has many unique and excellent characteristics, enabling more dense and more channel multiplexing.