Mitsumi Electric Company Ltd.

Tokyo Institute of Technology

Yuya Shoji

Tetsuya Mizumoto

It is provided a polarization-independent optical isolator without depending on the polarized wave of the light being input to the waveguide-type optical isolator, in particular, it is able to completely isolate the propagating light of the backward direction.

Polarization-independent optical isolator

A waveguide-type broadband optical isolator according to the present invention, comprising: a reciprocal phase shifter which makes a phase difference 3&#x3c0;/2 between a first light wave propagating through a first waveguide and a second light wave propagating through a second waveguide, with a fundamental operating wavelength &#x3bb;, and a nonreciprocal phase shifter which provides a phase difference &#x3c0;/2 for forward propagating waves and a phase difference &#x2212;&#x3c0;/2 for backward propagating waves.

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Tokyo, Japan

Yuya Shoji