| Efficient coupling from semiconductor lasers into single-mode fibers with tapered hemispherical ends H Kuwahara, M Sasaki, N Tokoyo Applied Optics 19 (15), 2578-2583, 1980 | 182 | 1980 |
| Modulation and demodulation techniques in optical heterodyne PSK transmission systems T Chikama, S Watanabe, T Naito, H Onaka, T Kiyonaga, Y Onoda, ... Journal of lightwave technology 8 (3), 309-322, 1990 | 113 | 1990 |
| Optimal 40 Gb/s modulation formats for spectrally efficient long-haul DWDM systems T Hoshida, O Vassilieva, K Yamada, S Choudhary, R Pecqueur, ... Journal of lightwave technology 20 (12), 1989-1996, 2002 | 101 | 2002 |
| Compensation of pulse shape distortion due to chromatic dispersion and Kerr effect by optical phase conjugation S Watanabe, T Chikama, G Ishikawa, T Terahara, H Kuwahara IEEE photonics technology letters 5 (10), 1241-1243, 1993 | 100 | 1993 |
| Optical circulator H Kuwahara US Patent 4,650,289, 1987 | 90 | 1987 |
| Optical coherent broad-band transmission for long-haul and distribution systems using subcarrier multiplexing S Watanabe, T Terahara, I Yokota, T Naito, T Chikama, H Kuwahara Journal of lightwave technology 11 (1), 116-127, 1993 | 66 | 1993 |
| Compact polarization-independent optical circulator M Shirasaki, H Kuwahara, T Obokata Applied optics 20 (15), 2683-2687, 1981 | 52 | 1981 |
| Numerical comparison of NRZ, CS-RZ and IM-DPSK formats in 43 Gbit/s WDM transmission O Vassilieva, T Hoshida, S Choudhary, G Castanon, H Kuwahara, ... LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society …, 2001 | 47 | 2001 |
| Polarization diversity optical receiver for coherent optical communication T Naito, T Chikama, S Watanabe, T Kiyonaga, Y Onoda, H Kuwahara, ... US Patent 4,965,858, 1990 | 44 | 1990 |
| Receiver for coherent optical communication T Naito, T Chikama, S Watanabe, T Kiyonaga, Y Onoda, H Kuwahara US Patent 5,115,332, 1992 | 42 | 1992 |
| Fundamental investigation of internal arcs in SF/sub 6/gas-filled enclosures H Kuwahara, T Miyamoto, S Sakuma, T Yamauchi, K Yoshinaga IEEE Trans. Power Appar. Syst.;(United States), 1982 | 30 | 1982 |
| Reliability and application of metal oxide surge arresters for power systems S Tominaga, K Azumi, T Nagai, M Imataki, H Kuwahara IEEE Transactions on Power Apparatus and Systems, 805-816, 1979 | 29 | 1979 |
| Dual balanced optical signal receiver H Kuwahara, T Chikama, T Kiyonaga, C Ohsawa US Patent 5,003,626, 1991 | 27 | 1991 |
| Efficient and reflection insensitive coupling from semiconductor lasers into tapered hemispherical-end single-mode fibers H Kuwahara, M Sasaki, N Tokoyo, M Saruwatari, K Nakagawa proc. 6th European conf. Opt. commun, 191-194, 1980 | 22 | 1980 |
| Optical isolator for semiconductor lasers H Kuwahara Applied Optics 19 (2), 319-323, 1980 | 22 | 1980 |
| Injection-locked 1.5? m InGaAsP/InP lasers capable of 450 Mbit/s transmission over 106 km H Nishimoto, H Kuwahara, M Motegi Electronics Letters 14 (19), 509-510, 1983 | 21 | 1983 |
| Efficient light coupling from semiconductor lasers into tapered hemispherical-end fibers H Kuwahara, H Furuta Proceedings of the IEEE 67 (10), 1456-1457, 1979 | 20 | 1979 |
| A semi-transparent mirror-type directional coupler for optical fiber applications H Kuwahara, S Saito IEEE Transactions on Microwave Theory and Techniques 23 (1), 179-180, 1975 | 20 | 1975 |
| Non-linear tolerant and spectrally efficient 86Gbit/s RZ-DQPSK format for a system upgrade O Vassilieva, T Hoshida, S Choudhary, H Kuwahara Optical Fiber Communication Conference, ThE7, 2003 | 18 | 2003 |
| Reflected light in the coupling of semiconductor lasers with tapered hemispherical end fibers H Kuwahara, Y Onoda, M Goto, T Nakagami Applied optics 22 (17), 2732-2738, 1983 | 18 | 1983 |
