A
Akira Hirano
Researcher at Harvard University
Publications - 193
Citations - 3841
Akira Hirano is an academic researcher from Harvard University. The author has contributed to research in topics: Wavelength-division multiplexing & Signal. The author has an hindex of 29, co-authored 189 publications receiving 3692 citations. Previous affiliations of Akira Hirano include Nippon Telegraph and Telephone.
Papers
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Journal ArticleDOI
Distance-adaptive spectrum resource allocation in spectrum-sliced elastic optical path network [Topics in Optical Communications]
Masahiko Jinno,Bartlomiej Kozicki,Hidehiko Takara,Atsushi Watanabe,Yoshiaki Sone,Takafumi Tanaka,Akira Hirano +6 more
TL;DR: A concept of a novel adaptation scheme in SLICE called distance-adaptive spectrum resource allocation, which can save more than 45 percent of required spectrum resources for a 12-node ring network, is presented.
Journal ArticleDOI
Multiflow optical transponder for efficient multilayer optical networking
TL;DR: A novel multiflow optical transponder (OTP) that enables more efficient IP optical networking and a novel optical virtual private line service based on multiflow OTPs that supports multiple optical connections from a single customer site to multiple customer sites with capacity adjustment is discussed.
Proceedings ArticleDOI
Disruption minimized spectrum defragmentation in elastic optical path networks that adopt distance adaptive modulation
TL;DR: Disruption-minimized spectrum defragmentation in dynamic elastic optical path networks that adopt distance adaptive modulation is evaluated and the number of accommodated paths is improved by 10% by the introduction of make-before-break rerouting.
Proceedings ArticleDOI
Dynamic routing and frequency slot assignment for elastic optical path networks that adopt distance adaptive modulation
Tatsumi Takagi,Hiroshi Hasegawa,Ken-ichi Sato,Yoshiaki Sone,Bartlomiej Kozicki,Akira Hirano,Masahiko Jinno +6 more
TL;DR: A dynamic routing and frequency slot assignment algorithm for SLICE networks that employ distance adaptive modulation is proposed and it is verified that the spectrum utilization penalty that stems from non-uniform bandwidth allocation is marginal.
Journal ArticleDOI
320 Gbit/s (8 × 40 Gbit/s) WDM transmission over 367 km with 120 km repeater spacing using carrier-suppressed return-to-zero format
Yutaka Miyamoto,Akira Hirano,Kazushige Yonenaga,Akihide Sano,Hiromu Toba,K. Murata,O. Mitomi +6 more
TL;DR: In this paper, the authors demonstrate +11 dBm-per-channel 320 Gbit/s (8/spl times/40 Gbps) transmission over a 367 km zero-dispersion-flattened transmission line with 120 km repeater spacing using a nonlinearity-tolerant carrier-suppressed return-to-zero format.