IEEE Photonics Journal (Jan 2016)

Polarization-Rotator-Free Polarization-Diversity 4 <inline-formula> <tex-math notation="LaTeX">$\times$</tex-math></inline-formula> 4 Si-Wire Optical Switch

  • K. Suzuki,
  • K. Tanizawa,
  • S.-H. Kim,
  • S. Suda,
  • G. Cong,
  • K. Ikeda,
  • S. Namiki,
  • H. Kawashima

DOI
https://doi.org/10.1109/JPHOT.2016.2523985
Journal volume & issue
Vol. 8, no. 2
pp. 1 – 7

Abstract

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We present a polarization-diversity 4×4 optical switch composed of silicon-wire waveguides. The proposed 4×4 switch does not require a polarization rotator, which enforces a modification in a standard complementary metal-oxide-semiconductor (CMOS) process to achieve vertical asymmetry. The switch is fabricated on a 300-mm silicon-on-insulator (SOI) wafer with argon fluoride (ArF) immersion lithography, and its footprint is 2.1 mm × 1.1 mm. The switch exhibited a 12.5-dB on-chip loss, a 1.9-dB polarization-dependent loss, and an approximately 5-ps differential group delay.

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