M. Kohtoku

Low-loss waveguides written with a femtosecond laser for flexible interconnection in a planar light-wave circuit

Yusuke Nasu, M. Kohtoku, Yoshinori Hibino · Optics Letters · 2005 · 205 citations

Over 67 GHz Bandwidth and 1.5 V Vπ InP-Based Optical IQ Modulator With n-i-p-n Heterostructure

Yoshihiro Ogiso, Josuke Ozaki, Yuta Ueda et al. · Journal of Lightwave Technology · 2016 · 140 citations

Photonics, Optical Pre Equalization, Engineering +13

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

Optical circuit design based on a wavefront-matching method

Toshikazu Hashimoto, Takashi Saida, I. Ogawa et al. · Optics Letters · 2005 · 78 citations

Polarisation-insensitive travelling-wave electrodeelectroabsorption (TW-EA)modulator with bandwidth over 50 GHz and driving voltage less than 2 V

Kenji Kawano, M. Kohtoku, M. Ueki et al. · Electronics Letters · 1997 · 77 citations