Abstract

We fabricate and characterize a polarization-diversity 32 × 32 silicon photonics switch by newly introducing SiN overpass waveguides onto our nonduplicate polarization-diversity path-independent insertion-loss switch. The SiN overpass waveguides are used to simplify the optical paths with a uniform path length between the edge couplers and the switch matrix and significantly reduce the number of waveguide intersections. The switch chip is fabricated using a 300-mm silicon-on-insulator wafer pilot line. The fabricated switch comprises more than 7,600 components, making this the largest ever complementary-metal-oxide-semiconductor-based silicon photonics circuit. The switch chip is electrically and optically packaged and evaluated for a sampled port connection with 32 paths, with an average on-chip loss of ∼35 dB and an average polarization-dependent loss of 3.2 dB where 75% of the measured paths exhibit a loss of less than 3 dB. The differential group delay is measured to be 1.7 ps. The performance can be further improved by optimizing the device design.

SiN/Si double-layer platform for ultralow-crosstalk multiport optical switches

Ryotaro Konoike, Keijiro Suzuki, Ken Tanizawa, Satoshi Suda, Hiroyuki Matsuura, Shu Namiki, Hitoshi Kawashima, and Kazuhiro Ikeda
Opt. Express 27(15) 21130-21141 (2019)

Non-duplicate polarization-diversity 8 × 8 Si-wire PILOSS switch integrated with polarization splitter-rotators

Ken Tanizawa, Keijiro Suzuki, Kazuhiro Ikeda, Shu Namiki, and Hitoshi Kawashima
Opt. Express 25(10) 10885-10892 (2017)

Novel polarization diversity without switch duplication of a Si-wire PILOSS optical switch

Ken Tanizawa, Keijiro Suzuki, Kazuhiro Ikeda, Shu Namiki, and Hitoshi Kawashima
Opt. Express 24(7) 6861-6868 (2016)

Ultra-compact 32 × 32 strictly-non-blocking Si-wire optical switch with fan-out LGA interposer

Ken Tanizawa, Keijiro Suzuki, Munehiro Toyama, Minoru Ohtsuka, Nobuyuki Yokoyama, Kazuyuki Matsumaro, Miyoshi Seki, Keiji Koshino, Toshio Sugaya, Satoshi Suda, Guangwei Cong, Toshio Kimura, Kazuhiro Ikeda, Shu Namiki, and Hitoshi Kawashima
Opt. Express 23(13) 17599-17606 (2015)

Compact 2 × 2 polarization-diversity Si-wire switch

Sang-Hun Kim, Ken Tanizawa, Yuya Shoji, Guangwei Cong, Keijiro Suzuki, Kazuhiro Ikeda, Hiroshi Ishikawa, Shu Namiki, and Hitoshi Kawashima
Opt. Express 22(24) 29818-29826 (2014)