Measurement of optical nonreciprocal phase shift in a bi-substituted Gd 3 Fe 5 O 12 film and application to waveguide-type optical circulator

An waveguide-type optical circulator can be constructed with an optical nonreciprocal phase shifter and 3-dB directional couplers. We have measured nonreciprocal phase shift in a Bi-substituted Gd 3 Fe 5 O 12 (abbreviated as Bi:GdIG) thin film. It is shown that the optical circulator of several millimeters length can be realized by using Bi:GdIG.

[1]  Y. Naito,et al.  Stress birefringence in YIG and Bi:YIG thin films , 1984 .

[2]  R. T. Lynch,et al.  Stress birefringence in ferrimagnetic garnets , 1973 .

[3]  K. Ando,et al.  Annealing effects on growth-induced optical birefringence in liquid-phase-epitaxial-grown Bi-substituted iron garnet films , 1985 .

[4]  J. Castera,et al.  Studies of magneto-optical effects in garnets thin film waveguides , 1977 .

[5]  A. Clark,et al.  Elastic Constants of Single-Crystal YIG , 1961 .

[6]  T. Suhara,et al.  Microgratings for high-efficiency guided-beam deflection fabricated by electron-beam direct-writing techniques. , 1980, Applied optics.

[7]  F. Auracher,et al.  A new design for an integrated optical isolator , 1975 .

[8]  S. Williamson,et al.  New High-Precision Photoelectric Universal Polarimeter and Birefringence Compensator* , 1964 .

[9]  Y. Okamura,et al.  Magnetooptic rib waveguides in YIG: an experiment. , 1984, Applied optics.

[10]  T. Hibiya,et al.  Refractive index of Bi‐substituted gadolinium iron garnet films grown by liquid‐phase epitaxy , 1985 .

[11]  M Shirasaki,et al.  Compact polarization-independent optical circulator. , 1981, Applied optics.

[12]  T Matsumoto,et al.  Polarization-independent optical circulator: an experiment. , 1980, Applied optics.

[13]  J. Warner,et al.  Nonreciprocal Magnetooptic Waveguides , 1975 .

[14]  R Ulrich,et al.  Measurement of thin film parameters with a prism coupler. , 1973, Applied optics.

[15]  Waveguide mode conversion by magnetic linear birefringence of Bi‐substituted iron garnet films tilted from (111) , 1985 .

[16]  J. Castera,et al.  Isolator in integrated optics using the Faraday and Cotton-mouton effects , 1977 .

[17]  Y. Naito,et al.  Nonreciprocal Propagation Characteristics of YIG Thin-Film , 1981 .