A direct measurement of the birefringence of a planar waveguide obtained by Na+ – K+ ion exchange was performed with a double Lloyd interferometer. The results are compared with those obtained by a round-robin test involving the same sample. Birefringence of as much as Δn = (2.0 ± 0.2) × 10−3 was measured.
© 1996 Optical Society of America
Original Manuscript: February 12, 1996
Published: August 15, 1996
E. Fazio, G. C. Righini, W. A. Ramadan, and M. Bertolotti, "Direct measurement of birefringence in ion-exchanged planar waveguides," Opt. Lett. 21, 1238-1240 (1996)