Optimization for Ultrabroadband Polarization Beam Splitters Using a Genetic Algorithm

Optimization for Ultrabroadband Polarization Beam Splitters Using a Genetic Algorithm

We present a design method for a directional coupler-type polarization beam splitter (PBS) for ultrabroadband operation based on a genetic algorithm (GA). The PBS is discretized into short sections, with the geometric parameters of each section optimized using a GA. For PBSs with an operating wavele...

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Bibliographic Details
Main Authors: Po-Han Fu, Tsuan-Yi Huang, Keng-Wei Fan, Ding-Wei Huang
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Photonics Journal
Subjects:
Broadband
optimization
polarization beam splitters
silicon photonics
Online Access:https://ieeexplore.ieee.org/document/8579194/
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Summary:We present a design method for a directional coupler-type polarization beam splitter (PBS) for ultrabroadband operation based on a genetic algorithm (GA). The PBS is discretized into short sections, with the geometric parameters of each section optimized using a GA. For PBSs with an operating wavelength range <italic>&#x03BB;</italic> &#x003D; 1400&#x2013;1650 nm, the insertion losses are less than 0.14 and 0.58 dB, and the maximum crosstalk is &#x2212;20.6 and &#x2212;16.2 dB for the TE and TM modes, respectively. We also analyze the fabrication tolerance in this study.
ISSN:1943-0655

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