G. Baxter, N. M. Dragomir, A. Roberts, S. F. Collins, P. M. Farrell, A. J. Stevenson, and D. D. Garchev, "DIC imaging of an optical fiber Bragg grating,"
in Optical Fiber Communications Conference, A. Sawchuk, ed.,
Vol. 70 of OSA Trends in Optics and Photonics
(Optical Society of America, 2002), paper ThGG62.