M. Takagi

Measurement of the nonlinear refractive index in optical fiber by the cross-phase-modulation method with depolarized pump light.

T. Kato, E. Sasaoka, Y. Suetsugu, 1995, Optics letters.

High Performance Polarization Maintaining Fiber Coils for Fiber Optic Gyroscopes

E. Sasaoka, S. Tanaka, M. Takagi, 1989 .