Waveguide optical isolator based on Mach–Zehnder interferometer
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- 17 April 2000
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 76 (16) , 2158-2160
- https://doi.org/10.1063/1.126284
Abstract
A waveguide optical isolator based on nonreciprocal interference is demonstrated. Ridge waveguides are fabricated in a Mach–Zehnder configuration on a single film of bismuth-, lutetium-, neodymium-iron garnet. With this design, no polarizers are required to achieve extinction in the backward propagation direction. This isolator exhibits a 19 dB extinction ratio at μm. A flat wavelength dependence, to within 2 dB, has been observed in the range between 1.49 and 1.57 μm.
Keywords
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