Inventor
HIRONISHI KAZUO
JP21 patents
⚠️ This page may combine multiple inventors who share the name “HIRONISHI KAZUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
18 patentsUS7613403B2Nov 3, 2009
Differential multilevel modulated optical signal receiver apparatus
FUJITSU LTD22 citations92
US6778730B2Aug 17, 2004
Optical signal processing device
FUJITSU LTD22 citations92
US6477300B2Nov 5, 2002
Method, device, and system for waveform shaping of signal light
FUJITSU LTD41 citations92
US6072610AJun 6, 2000
Optical transmission system
FUJITSU LTD33 citations92
US5805320ASep 8, 1998
Cross-connect device
FUJITSU LTD49 citations92
US7631378B2Dec 15, 2009
Optical waveform shaper
FUJITSU LTD8 citations84
US9768907B2Sep 19, 2017
Optical transmission apparatus and wavelength calibration method
FUJITSU LTD8 citations83
US6256137B1Jul 3, 2001
Wavelength converter
FUJITSU LTD17 citations83
US9281913B2Mar 8, 2016
Signal detection circuit and optical transmission equipment
FUJITSU LTD5 citations73
US7751721B2Jul 6, 2010
Optical DQPSK receiver apparatus
FUJITSU LTD5 citations63
US7706695B2Apr 27, 2010
Optical DQPSK receiver apparatus
FUJITSU LTD3 citations63
US7535616B2May 19, 2009
Polarization controlling apparatus and polarization operation apparatus
FUJITSU LTD2 citations62
US7123403B2Oct 17, 2006
Optical signal-to-noise ratio improving device
FUJITSU LTD2 citations62
US9503211B2Nov 22, 2016
Signal detection circuit and optical transmission equipment
FUJITSU LTD1 citations52
US9154233B2Oct 6, 2015
Frequency modulation signal demodulator and light receiving apparatus
FUJITSU LTD0 citations52
US9549233B2Jan 17, 2017
Transmission device and optical network system
FUJITSU LTD0 citations51
US7212334B2May 1, 2007
Optical signal-to-noise ratio improving device
FUJITSU LTD0 citations51
US9054814B2Jun 9, 2015
Front end device and superposing signal detecting device
FUJITSU LTD0 citations42
HIRONISHI KAZUO
3 patentsUS8965221B2Feb 24, 2015
Receiver and cross phase modulation reduction method
HIRONISHI KAZUO11 citations82
US8886057B2Nov 11, 2014
Optical receiver, signal processor, and optical receiving method
HIRONISHI KAZUO4 citations71
US8509628B2Aug 13, 2013
Differential multilevel modulated optical signal receiver apparatus
HIRONISHI KAZUO0 citations50