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Optics Express|February 12, 2014
120 Gbit/s, polarization-multiplexed 10 Gsymbol/s, 64 QAM coherent transmission over 150 km using an optical voltage controlled oscillatorYixin Wang, Keisuke Kasai, Tatsunori Omiya, et al.
Optics Express|April 4, 2015
2048 QAM (66 Gbit/s) single-carrier coherent optical transmission over 150 km with a potential SE of 15.3 bit/s/HzShohei Beppu, Keisuke Kasai, Masato Yoshida, et al.
Optics Express|January 22, 2015
120 Gbit/s injection-locked homodyne coherent transmission of polarization-multiplexed 64 QAM signals over 150 kmYixin Wang, Keisuke Kasai, Masato Yoshida, et al.
Optics Express|July 1, 2014
Adaptive 4~64 QAM real-time coherent optical transmission over 320 km with FPGA-based transmitter and receiverMasato Yoshida, Toshihiko Hirooka, Keisuke Kasai, et al.
Optics Express|January 26, 2012
Novel RZ-CW conversion scheme for ultra multi-level, high-speed coherent OTDM transmissionMasataka Nakazawa, Keisuke Kasai, Masato Yoshida, et al.
Optics Express|June 11, 2008
64 and 128 coherent QAM optical transmission over 150 km using frequency-stabilized laser and heterodyne PLL detectionMasato Yoshida, Hiroki Goto, Keisuke Kasai, et al.
Optics Express|September 24, 2016
320 Gbit/s, 20 Gsymbol/s 256 QAM coherent transmission over 160 km by using injection-locked local oscillatorYixin Wang, Keisuke Kasai, Masato Yoshida, et al.
Optics Express|August 19, 2018
Single-channel 200 Gbit/s, 10 Gsymbol/s-1024 QAM injection-locked coherent transmission over 160 km with a pilot-assisted adaptive equalizerYixin Wang, Seiji Okamoto, Keisuke Kasai, et al.
Optics Express|September 15, 2015
1024 QAM, 7-core (60 Gbit/s x 7) fiber transmission over 55 km with an aggregate potential spectral efficiency of 109 bit/s/HzMasato Yoshida, Shohei Beppu, Keisuke Kasai, et al.
Optics Express|December 25, 2019
Suppression of large error floor in 1024 QAM digital coherent transmission by compensating for GAWBS phase noiseMasato Yoshida, Naoya Takefushi, Keisuke Kasai, et al.
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