1
Yasushi Sugaya, Miki Takeda, Susumu Kinoshita, Terumi Chikama: Multi-wavelength light amplifier. Fujitsu, Staas & Halsey, April 25, 2000: US06055092 (64 worldwide citation)

A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, ...


2
Yasushi Sugaya, Miki Takeda, Susumu Kinoshita, Terumi Chikama: Multi-wavelength light amplifier. Fujitsu, Staas & Halsey, April 9, 2002: US06369938 (20 worldwide citation)

A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, ...


3
Yasushi Sugaya, Miki Takeda, Susumu Kinoshita, Terumi Chikama: Multi-wavelength light amplifier. Fujitsu, Staas & Halsey, November 12, 2002: US06480329 (19 worldwide citation)

A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, ...


4
Yasushi Sugaya, Miki Takeda, Susumu Kinoshita, Terumi Chikama: Multi-wavelength light amplifier. Fujitsu, Staas & Halsey, June 4, 2002: US06400499 (14 worldwide citation)

A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, ...


5
Miki Takeda, Susumu Kinoshita: Optical amplifier, optical amplifying apparatus, optical transmitter for use in optical communications system, and optical surge suppression method for the optical amplifier. Fujitsu, Staas & Halsey, January 9, 2001: US06172801 (12 worldwide citation)

There is disclosed a technique regarding an optical amplifier in an optical communications system. In order to effectively suppress optical surges during amplification of signal light, through a simple structure, there is provided an amplifying medium which amplifies input light and outputs the ampl ...


6
Miki Takeda, Susumu Kinoshita, Hiroshi Onaka: Method and device for optical amplification and system having the device. Fujitsu, Staas & Halsey, November 21, 2000: US06151158 (11 worldwide citation)

A device comprising an optical amplifier including an optical amplifying medium, and first and second optical filters operatively connected to the optical amplifier to suppress the wavelength dependence of gain. The medium has an input end and an output end for an optical signal. The medium is pumpe ...


7
Yasushi Sugaya, Miki Takeda, Susumu Kinoshita, Terumi Chikama: Multi-wavelength light amplifier. Fujitsu, Staas & Halsey, May 29, 2007: US07224517 (9 worldwide citation)

A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, ...


8
Yasushi Sugaya, Miki Takeda, Susumu Kinoshita, Terumi Chikama: Multi-wavelength light amplifier. Fujitsu, Staas & Halsey, January 6, 2009: US07474459 (7 worldwide citation)

A multi-wavelength light amplifier includes a first-stage light amplifier which has a first-light amplifying optical fiber amplifying a light input, a second-stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, ...


9
Norifumi Shukunami, Shinya Inagaki, Miki Takeda: Optical amplifying fiber and forming method for fiber grating. Fujitsu, Staas & Halsey, October 17, 2000: US06134046 (6 worldwide citation)

An optical amplifying fiber including a core doped with a rare earth element and having a first refractive index, a cladding surrounding the core and having a second refractive index smaller than the first refractive index, and a fiber grating formed in the core for transmitting signal light having ...


10
Yasushi Sugaya, Miki Takeda, Susumu Kinoshita, Terumi Chikama: Multi-wavelength light amplifier. Fujitsu, Staas & Halsey, April 15, 2014: US08699126 (1 worldwide citation)

A multi-wavelength light amplifier includes a first-stage light amplifier which has a first light amplifying optical fiber amplifying a light input, a second stage light amplifier which has a second light amplifying optical fiber amplifying a first light output from the first-stage light amplifier, ...