为制作宽带稳定的光纤偏振控制器件，提出了一种具有宽带稳定偏振拍长的多孔光纤模型.该模型通过调节纤芯附近一对特殊气孔和本底气孔的大小、形状以及气孔的间距，在包层中引入特定非对称结构.由于多孔光纤的偏振拍长对这些特定的非对称结构参量的误差扰动不敏感，而利用这些特定非对称结构产生的具有不同变化趋势的双折射相互补偿可以抑制双折射的非线性变化，因此不仅能有效降低偏振拍长的波长敏感性，而且能够同时降低偏振拍长对包层结构参量误差的敏感性.研究结果表明：以偏振拍长的相对变化率小于±4%为限，在1 550 nm波长窗口附近工作带宽达到200 nm，同时包层结构几何参量的误差容限达到0.1 μm量级，为实际拉制具有宽带稳定偏振拍长的多孔光纤提供了较为可行的工艺结构参量.

For making a polarization control device with stable wideband, a novel holey birefringence fiber with stable beatlength in broadband was proposed. Some specific asymmetrical structures were introduced into the cladding by adjusting a pair of the special holes near the core, the shape and size of holes in background and the lattice pitches. The polarization beat length is not sensitive to disturbances of these asymmetric structure parameters. The polarization beat length sensitivity to wavelength was reduced effectively, and the polarization beat length sensitivity to the errors of the cladding structures was also reduced through the mutual compensation of birefringence with different trends to suppress non-linear changes. The research results showed that the operating bandwidth was up to 200 nm near the 1 550 nm wavelength window if the relative change of polarization beat length must to be less than ±4%, while the error tolerance of the clad structure geometry parameter was reached 0.1 μm. A more feasible process structure parameters was provided for the actual drawing the holey fiber with broadband stable polarization beat length.