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公开(公告)号：US12047121B2
公开(公告)日：2024-07-23
申请号：US18077829
申请日：2022-12-08
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Koji Otsubo , Kazumasa Takabayashi , Masaki Sugiyama , Shuntaro Makino
IPC: H04B10/69 , H01S5/50 , H04B10/50 , H04B10/516
CPC classification number: H04B10/69 , H04B10/503 , H04B10/5161 , H01S5/50
Abstract: An optical device includes an optical coupler that inputs an optical signal received from a light source, a semiconductor optical amplifier that amplifies the optical signal received from the optical coupler, and a light receiving element that receives spontaneous emission light received from the semiconductor optical amplifier. The optical coupler includes a first input port to which the optical signal received from the light source is input, a second input port that is connected to an input stage of the light receiving element and that is different from the first input, and an output port that is connected to an input stage of the semiconductor optical amplifier, and that outputs optical signal received from the first input port to the semiconductor optical amplifier. The light receiving element receives, via the output port and the second input port, spontaneous emission light received from the semiconductor optical amplifier.
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公开(公告)号：US20190372699A1
公开(公告)日：2019-12-05
申请号：US16369259
申请日：2019-03-29
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro MAKINO , Kazumasa Takabayashi
Abstract: An optical device includes an optical coupler that performs branching of the input light and outputs a first-type branched light and a second-type branched light; a polarization converter that changes the direction of polarization of the second-type branched light output from the optical coupler; and a polarization synthesizer that outputs a polarization multiplexed light by synthesizing the first-type branched light, which is output from the optical coupler, and the second-type branched light, which has the direction of polarization changed by the polarization converter. The optical coupler has the wavelength characteristic that cancels out the wavelength characteristic of the polarization synthesizer regarding the second-type branched light included in the polarization multiplexed light.
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公开(公告)号：US12300973B2
公开(公告)日：2025-05-13
申请号：US17323616
申请日：2021-05-18
Applicant: Fujitsu Optical Components Limited
Inventor： Kazumasa Takabayashi , Shuntaro Makino
Abstract: An integrated photonic device having an array of two or more semiconductor optical amplifiers includes a first semiconductor optical amplifier, which has a first gain region and a second gain region connected by a first connecting waveguide, and a second semiconductor optical amplifier, which is provided in parallel with the first semiconductor optical amplifier and has a third gain region and a fourth gain region connected by a second connecting waveguide. The first gain region and the second gain region are provided on an outer side of the third gain region and the fourth gain region. The first connecting waveguide is configured to connect the first gain region and the second gain region on the outer side of the second connecting waveguide.
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Patent Agency Ranking
公开(公告)号：US20210091530A1
公开(公告)日：2021-03-25
申请号：US16990544
申请日：2020-08-11
Applicant: Fujitsu Optical Components Limited
Inventor： Kazumasa Takabayashi , Suguru Akiyama
Abstract: An optical amplifier includes an optical amplifier chip that includes a pair of semiconductor optical amplifiers (SOAs), a U-shaped waveguide connecting the pair of SOAS, and two electrodes that respectively correspond to the pair of SOAS and are separated from each other, and a base substrate that includes a common metal wiring connecting the two electrodes, and on which the optical amplifier chip is mounted.
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公开(公告)号：US11984696B2
公开(公告)日：2024-05-14
申请号：US16990544
申请日：2020-08-11
Applicant: Fujitsu Optical Components Limited
Inventor： Kazumasa Takabayashi , Suguru Akiyama
CPC classification number: H01S5/0014 , H01S5/04256 , H01S5/101
Abstract: An optical amplifier includes an optical amplifier chip that includes a pair of semiconductor optical amplifiers (SOAs), a U-shaped waveguide connecting the pair of SOAS, and two electrodes that respectively correspond to the pair of SOAS and are separated from each other, and a base substrate that includes a common metal wiring connecting the two electrodes, and on which the optical amplifier chip is mounted.
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公开(公告)号：US20230035193A1
公开(公告)日：2023-02-02
申请号：US17845365
申请日：2022-06-21
Applicant: Fujitsu Optical Components Limited
Inventor： Yukie Iga , Hirotomo Izumi , Kazumasa Takabayashi , Suguru Akiyama
Abstract: A wavelength filter includes a first filter circuit and a second filter circuit. The first filter circuit that has a passband that is obtained from a vernier effect by connecting, in series, a plurality of ring resonators each having a different transmission wavelength interval and that is within a gain band of an optical amplifier, and that passes, from the gain band, light at a selected wavelength and light that has a wavelength in a recursive mode and that is produced on a short wavelength side or a long wavelength side of the selected wavelength. The second filter circuit is connected to the first filter circuit in series and suppresses the light at the wavelength in the recursive mode from the light passing through the first filter circuit.
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公开(公告)号：US20210384709A1
公开(公告)日：2021-12-09
申请号：US17323616
申请日：2021-05-18
Applicant: Fujitsu Optical Components Limited
Inventor： Kazumasa Takabayashi , Shuntaro Makino
Abstract: An integrated photonic device having an array of two or more semiconductor optical amplifiers includes a first semiconductor optical amplifier, which has a first gain region and a second gain region connected by a first connecting waveguide, and a second semiconductor optical amplifier, which is provided in parallel with the first semiconductor optical amplifier and has a third gain region and a fourth gain region connected by a second connecting waveguide. The first gain region and the second gain region are provided on an outer side of the third gain region and the fourth gain region. The first connecting waveguide is configured to connect the first gain region and the second gain region on the outer side of the second connecting waveguide.
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公开(公告)号：US10560213B2
公开(公告)日：2020-02-11
申请号：US16369259
申请日：2019-03-29
Applicant: Fujitsu Optical Components Limited
Inventor： Shuntaro Makino , Kazumasa Takabayashi
Abstract: An optical device includes an optical coupler that performs branching of the input light and outputs a first-type branched light and a second-type branched light; a polarization converter that changes the direction of polarization of the second-type branched light output from the optical coupler; and a polarization synthesizer that outputs a polarization multiplexed light by synthesizing the first-type branched light, which is output from the optical coupler, and the second-type branched light, which has the direction of polarization changed by the polarization converter. The optical coupler has the wavelength characteristic that cancels out the wavelength characteristic of the polarization synthesizer regarding the second-type branched light included in the polarization multiplexed light.
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