P

Inventor

KOSAKA JUNYA

JP42 patents
⚠️ This page may combine multiple inventors who share the name “KOSAKA JUNYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

40 patents
US6038062AMar 14, 2000

Optical amplifier, method of controlling the output light from the optical amplifier, optical transmission system and method of controlling an optical transmission path

HITACHI LTD110 citations99
US5675432AOct 7, 1997

Optical amplification apparatus

HITACHI LTD128 citations99
US6094296AJul 25, 2000

Optical amplification apparatus

HITACHI LTD74 citations97
US6229641B1May 8, 2001

Optical amplifier, method of controlling the output light from the optical amplifier, optical transmission system and method of controlling an optical transmission path cross reference to related application

HITACHI LTD69 citations96
US5986800ANov 16, 1999

Optical amplification apparatus

HITACHI LTD45 citations96
US5864423AJan 26, 1999

Optical amplifier, method of controlling the output light from the optical amplifier, optical transmission system and method of controlling an optical transmission path

HITACHI LTD34 citations96
US6195480B1Feb 27, 2001

Optical transmission device and optical transmission system employing the same

HITACHI LTD27 citations93
US6483630B2Nov 19, 2002

Optical amplifier, method of controlling the output light from the optical amplifier, optical transmission system and method of controlling an optical transmission path cross reference to related application

HITACHI LTD14 citations92
US6433925B1Aug 13, 2002

Optical fiber amplifier and optical transmission system using the same

HITACHI LTD41 citations92
US6233091B1May 15, 2001

Optical amplifier unit control methods, optical amplifier systems and systems which use the methods and amplifier systems

HITACHI LTD20 citations92
US6091539AJul 18, 2000

Optical amplifier apparatus and control method thereof, and optical transmission system using optical amplifier apparatus

HITACHI LTD30 citations92
US6078422AJun 20, 2000

Optical amplifier unit control methods optical amplifier systems and systems which use the methods and amplifier systems

HITACHI LTD29 citations92
US6373622B1Apr 16, 2002

Optical amplification apparatus

HITACHI LTD9 citations82
US6256141B1Jul 3, 2001

Optical amplification apparatus

HITACHI LTD13 citations82
US6674938B2Jan 6, 2004

Optical amplifier, optical transmission equipment, optical transmission system, and method thereof

HITACHI LTD4 citations74
US6671084B2Dec 30, 2003

Optical amplifier

HITACHI LTD7 citations74
US6580550B1Jun 17, 2003

Filter with variable transmission character, optical transmission equipment and method of optical transmission

HITACHI LTD12 citations74
US6577438B2Jun 10, 2003

Method and apparatus for monitoring and controlling gain tilt in an optical amplifier

HITACHI LTD7 citations74
US6525871B2Feb 25, 2003

Optical amplification apparatus

HITACHI LTD6 citations74
US6490387B2Dec 3, 2002

Optical transmission device and optical transmission system employing the same

HITACHI LTD10 citations74
US6459527B1Oct 1, 2002

Optical amplifier apparatus and control method thereof, and optical transmission system using optical amplifier apparatus

HITACHI LTD11 citations74
US6400475B1Jun 4, 2002

Optical transmission system and optical communications device

HITACHI LTD12 citations74
US6321002B1Nov 20, 2001

Optical amplifier, optical transmission equipment, optical transmission system, and method thereof

HITACHI LTD10 citations74
US6314217B1Nov 6, 2001

Optical transmission device and optical transmission system employing the same

HITACHI LTD10 citations74
US6297902B1Oct 2, 2001

Light amplification medium control method, light amplification apparatus and system using the same

HITACHI LTD10 citations74
US6262835B1Jul 17, 2001

Optical amplifier unit control methods, optical amplifier systems and systems which use the methods and amplifier systems

HITACHI LTD11 citations74
US6229936B1May 8, 2001

Optical amplifier, optical transmission equipment, optical transmission system, and method thereof

HITACHI LTD12 citations74
US5943162AAug 24, 1999

Optical amplifier, optical amplifying method and optical transmission system using the optical amplifier

HITACHI LTD11 citations74
US5835260ANov 10, 1998

Optical amplifier, optical amplifying method and optical transmission system using the optical amplifier

HITACHI LTD9 citations74
US6532103B1Mar 11, 2003

Optical fiber amplifier and optical transmission system using the same

HITACHI LTD11 citations73
US6771854B2Aug 3, 2004

Optical transmission system and optical coupler/branching filter

HITACHI LTD11 citations72
US6563978B2May 13, 2003

Optical transmission system and optical coupler/branching filter

HITACHI LTD8 citations72
US6859308B2Feb 22, 2005

Optical amplifier

HITACHI LTD1 citations63
US6839164B2Jan 4, 2005

Optical transmission equipment and supervisory system thereof

HITACHI LTD6 citations63
US6836587B2Dec 28, 2004

Optical transmission device and optical transmission system employing the same

HITACHI LTD3 citations63
US6671431B2Dec 30, 2003

Optical transmission device and optical transmission system employing the same

HITACHI LTD2 citations63
US6496617B2Dec 17, 2002

Optical amplifier, optical transmission equipment, optical transmission system, and method thereof

HITACHI LTD3 citations63
US6867909B2Mar 15, 2005

Filter with variable transmission character, optical transmission equipment and method of optical transmission

HITACHI LTD0 citations52
US6839161B2Jan 4, 2005

Optical amplification apparatus

HITACHI LTD0 citations52
US6829408B2Dec 7, 2004

Optical amplifier, optical transmission equipment, optical transmission system, and method thereof

HITACHI LTD0 citations52

HITACHI COMM TECH LTD

1 patent

ASAHI CHEMICAL IND

1 patent