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Opt Express. 2012 Dec 10;20(26):B371-6. doi: 10.1364/OE.20.00B371.

An MMI-based polarization splitter using patterned metal and tilted joint.

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  • 1Mitsubishi Electric Research Laboratories, 201 Broadway, Cambridge, MA 02139, USA.


A novel polarization splitter on an InP substrate utilizing an MMI coupler loaded with a dielectric and gold layer pad is proposed and simulated. A tilted joint is used for adjusting the phases of TE and TM modes. The MMI section is less than 540 μm. Simulations show that the device has a polarization extinction ratio over 23 dB and an insertion loss below 0.7 dB over the entire C-band for both TE and TM polarizations. The device design was optimized to maximize the wavelength range and tolerance for manufacturing variations.

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