Inventor
IZUTSU MASAYUKI
JP34 patents
⚠️ This page may combine multiple inventors who share the name “IZUTSU MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NAT INST INF & COMM TECH
24 patentsUS7245787B2Jul 17, 2007
Bias adjustment method for optical SSB modulator or optical FSK modulator
NAT INST INF & COMM TECH20 citations92
US6970655B2Nov 29, 2005
Method and circuit for generating single-sideband optical signal
NAT INST INF & COMM TECH42 citations92
US8023775B2Sep 20, 2011
Super flat optical frequency comb signal generator
NAT INST INF & COMM TECH8 citations84
US7957653B2Jun 7, 2011
Phase control optical FSK modulator
NAT INST INF & COMM TECH17 citations84
US7957652B2Jun 7, 2011
Optical FSK/SSB modulator having intensity balance function
NAT INST INF & COMM TECH17 citations84
US7936996B2May 3, 2011
Automatic adjusting system of frequency shift keying modulator
NAT INST INF & COMM TECH8 citations84
US7853153B2Dec 14, 2010
Fourth harmonic generating system using optical double side-band suppressed carrier modulator
NAT INST INF & COMM TECH14 citations84
US7711215B2May 4, 2010
Optical amplitude modulation system capable of cancelling high order component
NAT INST INF & COMM TECH10 citations84
US7425696B2Sep 16, 2008
Photoelectric oscillator
NAT INST INF & COMM TECH8 citations74
US6791733B2Sep 14, 2004
Resonance type optical modulator using symmetric or asymmetric electrode
NAT INST INF & COMM TECH7 citations72
US7864330B2Jan 4, 2011
Method and device for calibrating a light intensity measurement device
NAT INST INF & COMM TECH6 citations63
US7555223B2Jun 30, 2009
UWB signal generator using optical FSK modulator
NAT INST INF & COMM TECH3 citations63
US7526209B2Apr 28, 2009
Optical frequency shift keying modulator
NAT INST INF & COMM TECH3 citations63
US7421209B2Sep 2, 2008
Optical wavelength multiplexing FSK modulation method
NAT INST INF & COMM TECH5 citations63
US7212331B2May 1, 2007
Reciprocating optical modulator
NAT INST INF & COMM TECH4 citations63
US7106497B2Sep 12, 2006
Low-noise optical frequency converter
NAT INST INF & COMM TECH4 citations63
US6987904B2Jan 17, 2006
Variable-optical-delay apparatus
NAT INST INF & COMM TECH5 citations63
US7236661B2Jun 26, 2007
Tunable dispersion compensation apparatus
NAT INST INF & COMM TECH2 citations57
US8005371B2Aug 23, 2011
Multi-wavelength signal generation device and multi-wavelength light generation method
NAT INST INF & COMM TECH1 citations52
US7962039B2Jun 14, 2011
Multiple wavelength light source, and generation method for multiple wavelength light
NAT INST INF & COMM TECH1 citations52
US7522844B2Apr 21, 2009
Multiple-wavelength optical modulation apparatus
NAT INST INF & COMM TECH1 citations52
US8014684B2Sep 6, 2011
Modulation light signal generating device and FSK modulation signal generating device
NAT INST INF & COMM TECH0 citations42
US7991298B2Aug 2, 2011
DSB-SC modulation system capable of erasing carrier and secondary component
NAT INST INF & COMM TECH0 citations42
US7660030B2Feb 9, 2010
Reciprocating optical modulation system
NAT INST INF & COMM TECH0 citations42
COMM RES LAB INDEPENDENT ADMIN
3 patentsUS6788832B2Sep 7, 2004
Optical modulator and optical signal and electric wave signal converter using same
COMM RES LAB INDEPENDENT ADMIN2 citations62
US6735010B2May 11, 2004
Resonator-type semiconductor optical modulator with asymmetrical electrode structure
COMM RES LAB INDEPENDENT ADMIN0 citations52
US7084649B2Aug 1, 2006
Method and apparatus for measuring three-dimensional distribution of electric field
COMM RES LAB INDEPENDENT ADMIN1 citations48