Inventor

Masataka Shirasaki

Inventor

Winchester, MA, US

Overview

1983–2021

Patent span

Physics

Primary field (CPC G)

Patents· 58 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G02Bprimary

G02BOptical elements, systems or apparatus41%

H04BTransmission26%

G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein11%

H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light4%

G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light3%

H04JMultiplex communication3%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2%

C03BManufacture, shaping, or supplementary processes1%

C03CChemical composition of glasses, glazes or vitreous enamels1%

C12MApparatus for enzymology or microbiology1%

PatentTitleYear

11,041,848Method and system for cell collection based on information regarding change over time2021 8,708,507'Optical apparatus for magnifying a view of an object at a distance'2014 7,193,778'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2007 7,171,071'Optical wavelength division multiplexed system using wavelength splitters'2007 7,158,304'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2007 7,075,723'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2006 6,947,216'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2005 6,909,550'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2005 6,901,183'Optical wavelength division multiplexed system using wavelength splitters'2005 6,786,611'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2004 6,781,758'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2004 6,717,731'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2004 6,607,278'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2003 6,556,742'Optical wavelength division multiplexed system using wavelength splitters'2003 6,481,861'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2002 6,478,433'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2002 6,471,361'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2002 6,390,633'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2002 6,343,866'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2002 6,332,689'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'2001 6,317,526'Optical phase controller and optical switch'2001 6,304,382'Virtually imaged phased array (VIPA) having a varying reflectivity surface to improve beam profile'2001 6,296,361'Optical apparatus which uses a virtually imaged phased array to produced chromatic dispersion'2001 6,226,115'Optical circulator or switch having a birefringent wedge positioned between faraday rotators'2001 6,185,040'Virtually imaged phased array (VIPA) having spacer element and optical length adjusting element'2001 6,169,630'Virtually imaged phased array (VIPA) having lenses arranged to provide a wide beam width'2001 6,144,494'Virtually imaged phased array (VIPA) having spacer element and optical length adjusting element'2000 6,028,706'Virtually imaged phased array (VIPA) having a varying reflectivity surface to improve beam profile'2000 5,999,320'Virtually imaged phased array as a wavelength demultiplexer'1999 5,982,488'Compensator which experiences thermal expansion to compensate for changes in optical distance through a transparent material'1999 5,982,539'Optical device'1999 5,973,838'Apparatus which includes a virtually imaged phased array (VIPA) in combination with a wavelength splitter to demultiplex wavelength division multiplexed (WDM) light'1999 5,969,866'Virtually imaged phased array (VIPA) having air between reflecting surfaces'1999 5,969,865'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'1999 5,930,045'Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion'1999 5,909,522'Chirped waveguide grating router with focal length adjustment'1999 5,838,849'Optical component wherein either an optical field distribution of received light or an optical field distribution of a propagation mode of a receiving waveguide has a double-hump shape'1998 5,812,304'Faraday rotator which generates a uniform magnetic field in a magnetic optical element'1998 5,701,376'Polarized-wave-dispersion- preventive optical fiber and its manufacturing method'1997 5,677,767'Fiber ring interferometer using a Kerr medium optical fiber loop'1997 5,592,500'Laser device'1997 5,535,000'Optical interferometer with squeezed vacuum and reduced guided-acoustic-wave brillouin scattering noise'1996 5,379,144'Optical transmitter'1995 5,281,804'Mirror apparatus for increasing light absorption efficiency of an optical detector'1994 5,276,701'Ring laser employing unidirectional attenuator'1994 5,274,495'Optical amplifier'1993 5,080,486'Spectrum measuring equipment utilizing double-image polarizing element'1992 5,073,331'Modulation method for use in a semiconductor laser and an apparatus therefor'1991 4,806,442'Spatial phase modulating masks and production processes thereof, and processes for the formation of phase-shifted diffraction gratings'1989 4,747,655'Optical wavelength compounding/dividing device'1988 4,712,880'Polarization rotation compensator and optical isolator using the same'1987 4,668,052'Optical switch having low cross-talk for wide range of wavelengths'1987 4,641,926'Polarizing element'1987 4,637,027'Laser light source device'1987 4,609,257'Faraday rotator assembly'1986 4,548,478'Optical device'1985 4,392,722'Prism polarizer'1983 4,387,953'Optical waveguide device with phase matching layers'1983

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1983–2007Patents assigned to FUJITSU LTD (54)· patent assignee history

1983–1999Based in Kawasaki, JP· patent location history

1988–2021Based in Tokyo, JP· patent location history

1992Patents assigned to ADVANTEST CORP (1)· patent assignee history

1994Patents assigned to MASS INST OF TECH (1)· patent assignee history

1994–1997Based in Belmont, MA, US· patent location history

1997–2001Based in Kanagawa, JP· patent location history

1999Patents assigned to LUCENT TECHNOLOGIES INC (1)· patent assignee history

1999–2014Based in Winchester, MA, US· patent location history

2000–2004Patents assigned to AVANEX CORP (16)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
FUJITSU LTD	54	1983–2007
AVANEX CORP	16	2000–2004
ADVANTEST CORP	1	1992
LUCENT TECHNOLOGIES INC	1	1999
MASS INST OF TECH	1	1994

Locations

Location	Patents	Span
Winchester, Massachusetts, US	31	1999–2014
Kawasaki, JP	18	1983–1999
Belmont, Massachusetts, US	4	1994–1997
Tokyo, JP	2	1988–2021
Kanagawa, JP	2	1997–2001