A V-ridge transmission grating is proposed to realize polarizer under second Bragg incidence. The grating can transmit the energy of TE-polarization light and TM-polarization light to -2nd and 0th orders, respectively. It is found that efficiency of 99.31 % can be reached in -2nd order under TE polarization and 0th order under TM polarization. By finite element method analysis, the grating has the optical characteristics of high efficiency and high extinction ratio. When the grating parameters such as the period and the thickness of the grating layer fluctuate within a certain range, it has few effect on the beam splitting effect and has a good tolerance. The presented V-ridge polarizer can have certain application value for optical fiber communication and laser system.

提出了一种V脊透射光栅来实现第二布拉格入射下的偏振器。光栅可以将TE偏振光和TM偏振光的能量分别传输到-2阶和0阶。发现在TE极化下以-2阶和在TM极化下以0阶可以达到99.31％的效率。通过有限元分析，光栅具有高效率和高消光比的光学特性。当光栅参数如光栅层的周期和厚度在一定范围内波动时，对分束效果影响很小，具有良好的公差。提出的V型脊偏振器对光纤通信和激光系统具有一定的应用价值。