Ishida Eiichi, Miura Kengo, Shoji Yuya, Yokoi Hideki, Mizumoto Tetsuya, Nishiyama Nobuhiko, Arai Shigehisa
Opt Express. 2017 Jan 9;25(1):452-462. doi: 10.1364/OE.25.000452.
We fabricated a magneto-optical (MO) isolator with a TE mode nonreciprocal phase shift. The isolator is based on a Mach-Zehnder interferometer composed of 3-dB directional couplers, a reciprocal phase shifter, and a nonreciprocal phase shifter. To realize TE mode operation in the optical isolator, we designed a novel waveguide structure composed of a hydrogenated amorphous silicon waveguide with an asymmetric MO garnet lateral clad on a garnet substrate. The isolator operation is successfully demonstrated in a fabricated device showing the different transmittances between forward and backward directions. The maximum isolation of the fabricated isolator is 17.9 dB at a wavelength of 1561 nm for the TE mode.
我们制造了一种具有TE模式非互易相移的磁光（MO）隔离器。该隔离器基于一个马赫曾德尔干涉仪，它由3分贝定向耦合器、一个互易相移器和一个非互易相移器组成。为了在光隔离器中实现TE模式运行，我们设计了一种新颖的波导结构，该结构由一个氢化非晶硅波导组成，在石榴石衬底上有一个非对称的MO石榴石横向包层。在制造的器件中成功演示了隔离器的运行，该器件显示出正向和反向之间不同的透射率。对于TE模式，制造的隔离器在波长为1561纳米时的最大隔离度为17.9分贝。
