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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 14,
  • Issue 8,
  • pp. 081301-
  • (2016)

Design of an ultra-broadband and fabrication-tolerant silicon polarization rotator splitter with SiO2 top cladding

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Abstract

An ultra-broadband and fabrication-tolerant silicon polarization rotator splitter is proposed in this Letter. Benefitting from the broadband and low-loss characteristics of the bi-level taper and counter-tapered coupler, the designed device has a simulated insertion loss and crosstalk of less than 0.2 and −15 dB in the waveband from 1290 to 1610 nm. These characteristics make it valuable in applications with large bandwidth requirements, such as full-grid Coarse wavelength division multiplexer (CWDM) and diplexer/triplexer fiber-to-the-home systems. The fabrication tolerance of the design is also analyzed, showing that the device performance is quite stable with normal manufacturing errors in silicon photonics foundries.

© 2016 Chinese Laser Press

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