Takeshi Fujisawa

50-Gb/s Direct Modulation of a 1.3-μm InGaAlAs-Based DFB Laser With a Ridge Waveguide Structure

Wataru Kobayashi, Tsuyoshi Ito, T. Yamanaka et al. · IEEE Journal of Selected Topics in Quantum Electronics · 2013 · 116 citations

Ridge Waveguide Structure, Photonics, Engineering +12

All-optical logic gates based on nonlinear slot-waveguide couplers

Takeshi Fujisawa, Masanori Koshiba · Journal of the Optical Society of America B · 2006 · 114 citations · Full text

Photonics, Engineering, Optical Properties +9

Polarization-independent optical directional coupler based on slot waveguides

Takeshi Fujisawa, Masanori Koshiba · Optics Letters · 2006 · 103 citations

Slot Waveguides, Photonics, Waveguides +14

Design and Fabrication of 10-/40-Gb/s, Uncooled Electroabsorption Modulator Integrated DFB Laser With Butt-Joint Structure

Wataru Kobayashi, M. Arai, T. Yamanaka et al. · Journal of Lightwave Technology · 2009 · 97 citations

Optical Materials, Engineering, Optical Transmission System +20

Chromatic dispersion profile optimization of dual-concentric-core photonic crystal fibers for broadband dispersion compensation

Takeshi Fujisawa, Kunimasa Saitoh, Keisuke Wada et al. · Optics Express · 2006 · 92 citations · Full text