Optical add-drop multiplexers based on autocloned photonic crystals. - Masayuki Shirane; Akiko Gomyo; Kenta Miura; Yasuo Ohtera; Hirohito Yamada; Shojiro Kawakami (IEEE J. Sel. Areas Commun., 2005)

Novel Functions in Microscopy Realized by Patterned Photonic Crystals. - Shojiro Kawakami; Yoshihiko Inoue (IEICE Trans. Electron., 2007)

16-ary stokes-vector modulation enabling DSP-based direct detection at 100 Gbit/s. - Kazuro Kikuchi; Shojiro Kawakami (OFC, 2014)

Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch. - Koki Sugiyama; Takafumi Chiba; Ken Tanizawa; Keijiro Suzuki; Takayuki Kawashima; Shojiro Kawakami; Kazuhiro Ikeda; Hitoshi Kawashima; Hiroshi Takahashi; Hiroyuki Tsuda (IEICE Electron. Express, 2017)

3-D PBS & 90 ° Optical Hybrid Circuit using Novel Planar Polarization Optics. - Takayuki Kawashima; Toshikazu Ijiro; Shojiro Kawakami (OFC, 2019)