[1] D. A. Jackson, A. Dandridge, and S. K. Sheem, “Measurement of small phase-shifts using a single-mode optical fiber interferometer,” Optics Letts., vol. 5, no. 4, pp. 139-141, 1980.
[2] D. A. Jackson, R. P. Priest, A. Dandridge, and A. B. Tveten, “Elimination of drift in a single-mode optical fiber interferometer using a piezo-electrically stretched coiled fiber,” Applied Optics, vol. 19, no. 17, pp. 2926-2929, 1980.