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1.发明公开
公开(公告)号：EP3364244A1
公开(公告)日：2018-08-22
申请号：EP16855482.2
申请日：2016-10-13
发明人： TAKASAKA, Shigehiro
IPC分类号： G02F1/39
CPC分类号： G02F1/395 , G02F1/39 , G02F2001/392 , G02F2203/07 , G02F2203/50 , H04B10/2507 , H04J14/02
摘要： An optical amplifier includes a pump-light source unit, a polarization multiplexer/demultiplexer, a first polarization-sensitive optical amplifying fiber unit, a second polarization-sensitive optical amplifying fiber unit, an optical multiplexer/demultiplexer that is connected to input a pump light beam to each of the first polarization-sensitive optical amplifying fiber unit and the second polarization-sensitive optical amplifying fiber unit, an optical discharge unit that constitutes an optical loop together with the first polarization-sensitive optical amplifying fiber unit and the second polarization-sensitive optical amplifying fiber unit and that discharges the pump light beam having propagated through each of the first polarization-sensitive optical amplifying fiber unit and the second polarization-sensitive optical amplifying fiber unit to outside the optical loop, and an optical circulator that outputs a signal light beam parametrically amplified by the first polarization-sensitive optical amplifying fiber unit and the second polarization-sensitive optical amplifying fiber unit due to the pump light beam in the optical loop, polarization-multiplexed by the polarization multiplexer/demultiplexer, and output from the polarization multiplexer/demultiplexer.
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2.发明公开
公开(公告)号：EP4447238A1
公开(公告)日：2024-10-16
申请号：EP22904276.7
申请日：2022-12-07
发明人： OGOSHI, Haruki , YOSHIDA, Junji , INABA, Yusuke , KIMOTO, Tatsuya , FUNABASHI, Masaki , ICHINO, Seiji , HOJO, Naoya , TAKASAKA, Shigehiro , SUGIZAKI, Ryuichi , THUDSALINGKARNSAKUL, Nitidet , ANANTATHANASARN, Sanguan
IPC分类号： H01S5/50 , G02F1/35 , H01S3/0933 , H01S5/042
摘要： A light source includes a seed light source and a booster amplifier. The seed light source outputs incoherent seed light having a predetermined bandwidth. The booster amplifier serves as a semiconductor optical amplifier that optically amplifies the seed light entered through a first end facet and outputs the amplified light through a second end facet. The booster amplifier has nL being set, which is the product of a refractive index n and a chip length L, so that relative intensity noise (RIN) and ripple are simultaneously suppressed in the amplified light.
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公开(公告)号：EP4131804A1
公开(公告)日：2023-02-08
申请号：EP21776945.4
申请日：2021-03-17
发明人： TAKASAKA, Shigehiro , MAEDA, Koichi , AISO, Keiichi , ARAI, Shinichi , SUGIZAKI, Ryuichi , MUKASA, Kazunori , TSUCHIDA, Yukihiro , TAKAHASHI, Masanori
IPC分类号： H04B10/291 , G02B6/02 , G02B6/036 , H01S3/067 , H01S3/10
摘要： An optical amplifying fiber includes at least a single core portion doped with a rare-earth element; an inner cladding portion that encloses the core portion and that has a lower refractive index than the maximum refractive index of the core portion; and an outer cladding portion that encloses the inner cladding portion and that has a lower refractive index than the refractive index of the inner cladding portion. The inner cladding portion includes a plurality of air bubbles.
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公开(公告)号：EP3851888A1
公开(公告)日：2021-07-21
申请号：EP19860710.3
申请日：2019-08-29
摘要： To provide an optical probe capable of changing a traveling direction of an output beam to a sideward direction. The optical probe includes an optical fiber that outputs a beam from a distal end thereof, and a traveling direction changing unit that changes a traveling direction of the output beam to a sideward direction with respect to the optical fiber. The optical probe includes a holder member that is mounted on a distal end side of the optical fiber and holds the optical fiber, and the traveling direction changing unit may be a reflector that is arranged on the holder member and that reflects output beam.
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公开(公告)号：EP3832254A1
公开(公告)日：2021-06-09
申请号：EP19844627.0
申请日：2019-07-31
摘要： A cable includes: a plurality of optical fiber cores; and one or more optical fiber core wires including one or more of the optical fiber cores, in which the optical fiber core wire is fixed at a plurality of positions in a cable longitudinal direction so as to achieve substantially no displacement in a cable radial direction. The cable may be formed of a plurality of structural materials including transmission lines, and the optical fiber core wire may be fixed at a plurality of positions in the longitudinal direction to at least one of the plurality of structural materials.
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公开(公告)号：EP3726673A1
公开(公告)日：2020-10-21
申请号：EP18889588.2
申请日：2018-12-17
发明人： TAKASAKA, Shigehiro , MAEDA, Koichi
摘要： An aim is to provide an optical coupler that contributes increasing pump-efficiency in an optical amplifier, and the optical amplifier. The optical amplifier includes: a main optical fiber (4a, 4Ba, 6a) that includes a core (2ba, 4aa, 4Baa, 6aa) transmitting signal light, an inner cladding portion (4ab, 4Bab, 6ab) formed around an outer periphery of the core (2ba, 4aa, 4Baa, 6ab) and having a refractive index lower than a refractive index of the core (2ba, 4aa, 4Baa, 6aa), and an outer cladding portion (4ac, 6ac) formed around an outer periphery of the inner cladding portion (4ab, 4Bab, 6ab), having a refractive index lower than the refractive index of the inner cladding portion (4ab, 4Bab, 6ab), a part of the outer cladding portion (4ac, 6ac) of which in a longitudinal direction being removed; and at least one pump-light input-output optical fiber (4b, 6b) that is fusion-spliced to the inner cladding portion (4ab, 4Bab, 6ab) of the main optical fiber (4a, 4Ba, 6a) at the portion where the outer cladding portion (4ac, 6ac) is removed, an average refractive index of which in a contact region where the pump-light input-output optical fiber (4b, 6b) is in contact with the inner cladding portion (4ab, 4Bab, 6ab) being larger than the refractive index of the inner cladding portion (4ab, 4Bab, 6ab). Pump-light propagating in the pump-light input-output optical fiber (4b, 6b) is coupled to the inner cladding portion (4ab, 4Bab, 6ab) from the contact region and propagates in the inner cladding portion (4ab, 4Bab, 6ab), or the pump-light propagating in the inner cladding portion (4ab, 4Bab, 6ab) is coupled to the pump-light input-output optical fiber (4b, 6b) from the contact region and propagates in the pump-light input-output optical fiber (4b, 6b).
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公开(公告)号：EP4130818A1
公开(公告)日：2023-02-08
申请号：EP21781589.3
申请日：2021-02-26
发明人： TAKASAKA, Shigehiro , MAEDA, Koichi , SUGIZAKI, Ryuichi , TSURITANI, Takehiro , TAKAHASHI, Hidenori , MORITA, Itsuro
摘要： An optical fiber amplification system includes a first optical fiber amplifier that includes: a first optical amplifying fiber that has a core portion doped with a first rare-earth element and that has a cladding excitation type structure; a first input unit that receives a first signal light which is to be input to the core portion of the first optical amplifying fiber; an excitation-light source that outputs an pump light which causes optical excitation of the first rare-earth element; a pump light combiner that inputs the pump light to the first optical amplifying fiber; and a residual pump light recovery device that recovers a residual pump light which represents some part of the pump light output from the first optical amplifying fiber. The optical fiber amplification system further includes a second optical amplifying fiber which has a core portion doped with a second rare-earth element that is subjected to optical excitation by the residual pump light and which has a cladding excitation type structure; a second input unit that receives a second signal light which is input to the core portion of the second optical amplifying fiber; and a residual pump light combiner that inputs, to the second optical amplifying fiber, the residual pump light recovered by the residual pump light recovery device.
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公开(公告)号：EP2682813B1
公开(公告)日：2020-11-18
申请号：EP12754607.5
申请日：2012-03-05
发明人： TAKASAKA, Shigehiro , MIMURA, Yu
IPC分类号： G02F1/39 , G02F1/35 , H04B10/294 , H01S3/067 , H01S3/30
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10.发明公开SYNCHRONIZED OPTICAL SIGNAL GENERATION DEVICE AND SYNCHRONIZED OPTICAL SIGNAL GENERATION METHOD 审中-公开同步光信号发生装置和同步光信号发生方法
公开(公告)号：EP2040117A1
公开(公告)日：2009-03-25
申请号：EP07768271.4
申请日：2007-07-06
IPC分类号： G02F2/00
CPC分类号： G02F2/002 , G02F2203/56 , H04L7/0075
摘要： A synchronized optical signal generation device includes: optical phase detection means which compares the phase of a reference optical signal and the phase of a beat optical signal and generates a phase error signal; rectifying means which rectifies the phase error signal; and voltage control optical signal generation means which generates and outputs a beat signal according to the rectified phase error signal and feeds back the beat optical signal to the phase detection means. The voltage control optical signal generation means includes: voltage control electric signal generation means which generates and outputs an electric signal corresponding to the rectified phase error signal; an optical comb generation means which generates an optical comb signal having an optical spectrum line of a frequency interval corresponding to the electric signal generated by the voltage control electric signal generation means; 2-mode selection means which selects an optical signal of the optical spectrum line of two wavelengths from the optical comb signal; and 2-mode multiplexing means which multiplexes the optical signals of the selected two wavelengths so as to be outputted as a beat optical signal and feeds backs the beat optical signal to the phase detection means.
摘要翻译： 一种同步光信号发生装置包括：光参考光信号的相位与拍频光信号的相位进行比较并产生相位误差信号的光相位检测装置; 整流装置，其对相位误差信号进行整流; 以及电压控制光信号发生装置，根据整流的相位误差信号产生并输出差拍信号，并将该差拍光信号反馈给相位检测装置。 电压控制光信号产生装置包括：电压控制电信号产生装置，产生和输出对应于整流相位误差信号的电信号; 光梳生成装置，用于生成具有与由电压控制电信号生成装置生成的电信号对应的频率间隔的光谱线的光梳信号; 2模式选择装置，用于从光梳信号中选择两个波长的光谱线的光信号; 以及2模式多路复用装置，其将所选择的两个波长的光信号多路复用，以便作为拍频光信号输出，并将拍频光信号反馈给相位检测装置。
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