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Dive into the research topics where Norihisa Naganuma is active.

Publication


Featured researches published by Norihisa Naganuma.


optical fiber communication conference | 2000

Flexibly variable spectrum equalizer for spectral tilt compensation

Nobuaki Mitamura; Hiroshi Nagaeda; N. Shukunami; Norihisa Naganuma; N. Fukushima

A new variable-spectrum-equalizer (VSEQ) which combines the polarization dependence of dielectric film with magneto-optics is proposed and demonstrated. The VSEQ features flexible equalization capability with a simple drive-circuit maintaining wide dynamic-range (7 dB) and wide bandwidth (35 nm).


Archive | 2005

Optical switch device

Shinji Maruyama; Norihisa Naganuma


Archive | 1998

Optical device and optical amplifier

Norihisa Naganuma


Archive | 1997

Optical multiplexer/demultiplexer and wavelength division multiplexing module

Norihisa Naganuma; Teruhiro Kubo; Nobuhiro Fukushima


Archive | 1999

Optical amplifier and fiber module for optical amplification

Norihisa Naganuma; Norifumi Shukunami


Archive | 1996

Optical repeater having redundancy

Norihisa Naganuma


Archive | 1989

Polarization beam coupler including a splitter for producing an output monitor beam

Norihisa Naganuma; Hisashi Takamatsu; Kenichi Abe


Archive | 2002

Wavelength characteristic control device, gain equalizer, and light amplifier

Norihisa Naganuma


Archive | 2002

Light source apparatus, optical amplifier and optical communication system

Norihisa Naganuma; Norifumi Shukunami


Archive | 2002

METHOD FOR GAIN EQUALIZATION, AND DEVICE AND SYSTEM FOR USE IN CARRYING OUT THE METHOD

Norihisa Naganuma

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