PROJECT TITLE :

A High Extinction Ratio Polarization Beam Splitter With MMI Couplers on InP Substrate

ABSTRACT:

A high extinction ratio (ER) polarization beam splitter with three different multimode interference couplers on InP substrate was designed by a three-dimensional beam propagation method. Simulations show that the polarization ER (PER) is over 34 dB and internal loss is <0.8 dB for both TE and TM polarizations. The PER imbalance between the two polarization states has been reduced to 22 dB. The total length of the device is $< 950~mu text{m}$ . The effects of the width of the input port on the performance of the device are discussed in detail.


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