Mach-Zehnder modulators with active Y-branch structure for precise lightwave control

  • H. Nakajima, Y. Yamaguchi, T. Kawanishi, and M. Izutsu
  • International Conference on Optical Internet (COIN), TC1-2

40 years anniversary of Ti:LiNbO3 and beyond

  • H. Nakajima
  • ECIO-MOC 2014, We2b

Interferometers in Microoptics

  • H. Nakajima
  • Microoptics conference (MOC)

Bandwidth of backward second harmonic generation in ultrafine-structured LiNbO3 waveguide

  • S. Kurimura, M. Shimizu, T. Utsugida, S. Horikawa, K. Fujii, and H. Nakajima
  • ASSL, ATh2A

Wavelength Characteristics of Mach-Zehnder Modulator Using Active Y-branch

  • H. Koyano, Y. Yamaguchi, A. Kanno, T. Kawanishi, M. Izutsu, and H. Nakajima
  • International Topical Meeting on Microwave Photonics / Asia-Pasific Microwave Photonics Conference (MWP/APMP) , TuEB-7

Suppression of Third-order Harmonics in Two-tone Signals Using Cascaded Mach-Zehnder Modulators

  • K. Seki, Y. Yamaguchi, A. Kanno, T. Kawanishi, M. Izutsu, and H. Nakajima
  • International Topical Meeting on Microwave Photonics / Asia-Pasific Microwave Photonics Conference (MWP/APMP) , TuEC-4

Frequency-Quadruple Optical Two-Tone Signal Generation Using Integrated High Extinction-Ratio Mach-Zehnder Modulator

  • Y. Yamaguchi, S. Nakajima, A. Kanno, T. Kawanishi, M. Izutsu, and H. Nakajima
  • International Topical Meeting on Microwave Photonics / Asia-Pasific Microwave Photonics Conference (MWP/APMP) , TuEC-5

Extinction-Ratio and Chirp Tunable LiNbO3 Single-Drive Modulator for Precise Amplitude Modulation

  • Y. Yamaguchi, S. Nakajima, A. Kanno, T. Kawanishi, M. Izutsu, and H. Nakajima
  • European Conference on Optical Communication (ECOC) , Mo.3.4.1

Graphene Integrated Silicon Photonics

  • R. Kou, S. Tanabe, T. Tsuchizawa, K. Warabi, Y. Kobayashi, S. Suzuki, H. Hibino, T. Yamamoto, H. Nakajima, and K. Yamada
  • ECIO-MOC 2014, (Nice, France), Fr3aI4

Selectively formed spot-size converters for efficient coupling in grapheme-integrated silicon photonics

  • Y. Kobayashi, K. Warabi, R. Kou, H. Nishi, T. Tsuchizawa, T. Yamamoto, K. Yamada, and H. Nakajima
  • ECIO-MOC 2014, (Nice, France), Tu3bR1

CW backward second harmonic generation with 720 nm-period domains in a QPM adhered-ridge waveguide

  • M. Shimizu, T. Utsugida, S. Horikawa, K. Fujii, S. Kurimura, and H. Nakajima
  • CLEO 2014, (San Jose, USA), STu3H.3

Q factor variation in grapheme-loaded silicon ring resonators

  • R. Kou, S. Tanabe, T. Tsuchizawa, T. Yamamoto, H. Hibino, H. Nakajima, and K. Yamada
  • CLEO 2014, (San Jose, USA), SM3H.4

High extinction-ratio characteristics over 60 dB Mach-Zehnder modulator with asymmetric powersplitting Y-branches on X-cut Ti:LiNbO3

  • Y. Yamaguchi, S. Nakajima, A. Kanno, T. Kawanishi, M. Izutsu, and H. Nakajima
  • 18th Microoptics Conference (MOC’13), (Tokyo, Japan), H-15

Optical waveguide resonator for one-port refractive index sensing

  • N. Fujiwara, H. Okayama, H. Irikawa, T. Ooka, M. Tsutsui, and H. Nakajima
  • 18th Microoptics Conference (MOC’13), (Tokyo, Japan), H-51

Single Mach-Zehnder Modulator with Active Y-branch for Higher than 60 dB Extinction-Ratio Operation

  • Y. Yamaguchi, S. Nakajima, A. Kanno, T. Kawanishi, M. Izutsu, and H. Nakajima
  • European Conference on Optical Communication (ECOC) , P.2.15

Optical Waveguide Resonator for Refractive Index Change Sensor Using Arrayed Waveguide with Grating to Couple Light Beam

  • H. Irikawa, H. Okayama, N. Fujiwara, T. Ooka and H. Nakajima
  • CLEO-Pacific Rim & OECC/PS 2013 (Kyoto, Japan), TuPL-9

Characterization for optical absorption and polarization dependence of single-layer graphene integrated on a silicon wire waveguide

  • K. Warabi, R. Kou, S. Tanabe, T. Tsuchizawa, S. Suzuki, H. Hibino, H. Nakajima, K. Yamada
  • CLEO-Pacific Rim & OECC/PS 2013

High extinction ratio characteristics of over 60 dB Mach–Zehnder modulator with asymmetric power-splitting Y-branches on X-cut Ti:LiNbO3

  • Y. Yamaguchi, S. Nakajima, A. Kanno, T. Kawanishi, M. Izutsu, and H. Nakajima
  • Jpn. J. Appl. Phys., Vol. 53, No. S82, pp. 08MB03

Efficient- and broadband-coupled selective spot-size converters with damage-free graphene integration process

  • R. Kou, Y. Kobayashi, K. Warabi, H. Nishi, T. Tsuchizawa, T. Yamamoto, H. Nakajima, and K. Yamada
  • IEEE Photon. Journal, Vol. 6, No. 3, pp. 6600409

Optical absorption characteristics and polarization dependence of single-layer graphene on silicon waveguide

  • K. Warabi, R. Kou, S. Tanabe, T. Tsuchizawa, S. Suzuki, H. Hibino, H. Nakajima, and K. Yamada
  • IEICE Trans. Electron., Vol. E97-C, No. 7, pp. 736-743