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公开(公告)号：US12078877B2
公开(公告)日：2024-09-03
申请号：US17836074
申请日：2022-06-09
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
Abstract: An optical device includes a rib waveguide that is a thin-film lithium niobate (LN) crystal, a buffer layer that is laminated on the rib waveguide, and an electrode that applies voltage to the rib waveguide. The buffer layer includes a thick-film part that is laminated on a rib of the rib waveguide, and thin-film parts that are laminated on slabs of the rib waveguide, where the slabs are located on both sides of the rib, and that have smaller thicknesses than a thickness of the thick-film part.
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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：US11914189B2
公开(公告)日：2024-02-27
申请号：US17450620
申请日：2021-10-12
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
CPC classification number: G02B6/125 , G02F1/0353 , G02F1/0356 , G02F1/2255
Abstract: An optical device includes a plurality of first Si waveguides that split and output an optical signal received from an input unit, plurality of LN waveguides that are included in a LN modulator and that transmit the optical signals that are split and output by the first Si waveguides, and a plurality of second Si waveguides that multiplex and output the associated optical signals that are output from the plurality of respective LN waveguides. The device includes an output unit that outputs the optical signal multiplexed by the second Si waveguides, and a plurality of Mach-Zehnder interferometers disposed on each of waveguides connected by the first Si waveguides, the LN waveguides, and the second Si waveguides, respectively. When there are differences among waveguide lengths of the LN waveguides, the device is configured such that the optical path lengths of the waveguides for the respective Mach-Zehnder interferometers are equalized.
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公开(公告)号：US20230296927A1
公开(公告)日：2023-09-21
申请号：US18062748
申请日：2022-12-07
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
IPC: G02F1/01
CPC classification number: G02F1/0147 , G02F1/011 , G02F1/0121 , G02F2201/063 , G02F2201/066 , G02F2201/12 , G02F2201/42
Abstract: 1An optical device includes a substrate, a dielectric substance that is laminated on the substrate, an optical waveguide that is surrounded by the dielectric substance, and a heater electrode that is disposed on the optical waveguide and that is surrounded by the dielectric substance. The optical waveguide is a rib type optical waveguide that includes a slab and a rib on the slab, that is located below the heater electrode, and that has a structure in which a width of the slab is less than or equal to 11 times a width of the rib.
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公开(公告)号：US20230046400A1
公开(公告)日：2023-02-16
申请号：US17836074
申请日：2022-06-09
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
Abstract: An optical device includes a rib waveguide that is a thin-film lithium niobate (LN) crystal, a buffer layer that is laminated on the rib waveguide, and an electrode that applies voltage to the rib waveguide. The buffer layer includes a thick-film part that is laminated on a rib of the rib waveguide, and thin-film parts that are laminated on slabs of the rib waveguide, where the slabs are located on both sides of the rib, and that have smaller thicknesses than a thickness of the thick-film part.
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Patent Agency Ranking
公开(公告)号：US20220291567A1
公开(公告)日：2022-09-15
申请号：US17591395
申请日：2022-02-02
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
Abstract: An optical device includes a substrate W, a RF modulating unit, and a phase adjustment unit 220. The RF modulating unit is provided on the substrate W and modulates light in accordance with a RF signal. The phase adjustment unit 220 is provided on the substrate W and adjusts the phase of an optical signal modulated by the RF modulating unit. The phase adjustment unit 220 includes a heater 2200 and a to-be-heated optical waveguide 2201. The to-be-heated optical waveguide 2201 is provided between a thin film LN substrate 32 and a buffer layer 33 of the substrate W, and is formed of a material having a thermo-optical effect. The heater 2200 is provided at a position opposite the to-be-heated optical waveguide 2201, with the buffer layer 33 therebetween on the substrate W, and heats the to-be-heated optical waveguide 2201.
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公开(公告)号：US11320486B2
公开(公告)日：2022-05-03
申请号：US16503696
申请日：2019-07-05
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
IPC: G01R31/3185 , G02B27/28 , H04B10/40 , G01R31/28
Abstract: An optical device is formed on an optical IC chip. The shape of the optical IC chip is rectangular or parallelogram. The optical device induces: an optical device circuit; a first optical waveguide that is coupled to the optical device circuit; a pad that is electrically connected to the optical device circuit; a grating coupler; and a second optical waveguide that is coupled to the grating coupler. The pad is formed in a region close to a first side of the optical IC chip. The grating coupler is formed in a specified region, which is not close to the first side, on the optical IC chip. The first optical waveguide and the second optical waveguide are respectively extended to an edge of the optical IC chip.
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公开(公告)号：US10746924B2
公开(公告)日：2020-08-18
申请号：US15178945
申请日：2016-06-10
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
Abstract: An optical communication device includes a support substrate, an optical waveguide, and a detector. The optical waveguide includes a first cladding layer that is formed on the support substrate, and is composed of silicon oxide or a material containing silicon oxide; a second cladding layer formed on the first cladding layer; and a core that is formed within the second cladding layer or between the first cladding layer and the second cladding layer, and is composed of silicon or a silicon-containing material. The detector contacts a part of the core, and is adapted to detect an intensity of light propagating through the core.
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公开(公告)号：US20200044739A1
公开(公告)日：2020-02-06
申请号：US16505139
申请日：2019-07-08
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
IPC: H04B10/25 , H04B10/40 , H04B10/073 , G01J4/04
Abstract: An optical device is formed on an optical IC chip. The optical device includes: an optical device circuit; a first optical waveguide that is coupled to the a first grating coupler; a second grating coupler; a polarization rotator that is coupled to the first grating coupler; a polarization beam combiner or a polarization beam splitter that is coupled to the polarization rotator and to the second grating coupler; and a second optical waveguide that is coupled to the polarization beam combiner or to the polarization beam splitter. The first optical waveguide and the second optical waveguide respectively extend to an edge of the optical IC chip.
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公开(公告)号：US20190041577A1
公开(公告)日：2019-02-07
申请号：US16048753
申请日：2018-07-30
Applicant: Fujitsu Optical Components Limited
Inventor： Masaki Sugiyama
IPC: G02B6/12
Abstract: A tunable optical source includes a substrate, a light source disposed on the substrate, and a wavelength selecting element configured to select light of a specific wavelength as output light, from light emitted from the light source, in accordance with a control signal. On the substrate, a wavelength filter including multiple output ports and a photodetector are disposed. The wavelength filter is configured to receive a part of the output light and to output light beams to the respective output ports. The photodetector is configured to receive the light beam output from one of the output ports. The tunable optical source further includes an inspection waveguide connecting to the photodetector at one end, and an inspection light input unit for inputting inspection light provided at the other end of the inspection waveguide.
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