Title :
Polarization-independent waveguide optical isolator based on nonreciprocal phase shift
Author :
Fujita, J. ; Levy, M. ; Osgood, R.M. ; Wilkens, L. ; Dötsch, H.
Author_Institution :
Microelectron. Sci. Lab., Columbia Univ., New York, NY, USA
Abstract :
A polarization-independent waveguide optical isolator based on nonreciprocal interference is proposed. The design uses simultaneous TE and TM nonreciprocal phase shifts obtained from geometric asymmetry in horizontal and vertical axes of waveguide cross section along with opposing transverse and vertical magnetic fields in interferometer arms. A design to achieve such an isolator is described. Both TE and TM nonreciprocal phase shifts comparable to the theoretical counterparts have also been experimentally observed from a single waveguide.
Keywords :
light interferometers; light polarisation; magneto-optical isolators; optical communication equipment; optical design techniques; optical phase shifters; optical planar waveguides; optical waveguide components; TE nonreciprocal phase shifts; TM nonreciprocal phase shifts; design uses; geometric asymmetry; horizontal axes; nonreciprocal interference; nonreciprocal phase shift; polarization-independent waveguide optical isolator; simultaneous TE/TM nonreciprocal phase shifts; single waveguide; transverse magnetic fields; vertical axes; vertical magnetic fields; waveguide cross section; waveguide optical isolator; Geometrical optics; Interference; Isolators; Magnetic fields; Optical interferometry; Optical polarization; Optical waveguide theory; Optical waveguides; Phase shifting interferometry; Tellurium;
Journal_Title :
Photonics Technology Letters, IEEE
