[1] M. P. Varnham, R. D. Birch, D. N. Payne. Helical-core circularly-birefringent fibers. Proc. IOOC/ECOC., (Venice, Italy), 1985. 135~138
[2] R. D. Birch. Fabrication and characterisation of circularly-birefringent helical fibers. Electron. Lett., 1987, 23(1): 50~52
[3] R. Ulrich, A. Simon. Polarisation Optics of twisted single-mode fibers. Appl. Opt., 1979, 18(13): 2241
[4] A. W. Snyder, J. D. Love. Optical waveguide theory. New York: Chapman and Hall, 1983. 474
[5] J. R. Qian, C. D. Hussey. Circular birefringence in helical-core fiber. Electron. Lett., 1986, 22(10): 515~517