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公开(公告)号：US20130243363A1
公开(公告)日：2013-09-19
申请号：US13761526
申请日：2013-02-07
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki Sugiyama
IPC: G02F1/01
CPC classification number: G02F1/225 , G02F1/011 , G02F1/035 , G02F1/3136 , G02F2001/212
Abstract: An optical modulator includes a first coupler that branches an input light into two and outputs a first output light and a second output light; a first Mach-Zehnder interferometer (MZI) that modulates the intensity of the first output light from the first coupler and outputs a third output light; a second MZI that modulates the intensity of the second output light from the first coupler and outputs a fourth output light; a second coupler that combines the third output light from the first MZI and the fourth output light from the second MZI, branches a combined light into two, and outputs a fifth output light and a sixth output light. The interaction length of a branch of the first coupler and that of the second coupler are set such that the wavelength dependence of the splitting ratio of the first coupler is inversely related to that of the second coupler.
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公开(公告)号：US20130223838A1
公开(公告)日：2013-08-29
申请号：US13688624
申请日：2012-11-29
Applicant: Fujitsu Optical Components Limited
Inventor： Masakazu Horishita , Shinichi Sakuramoto
IPC: H04B10/071
CPC classification number: H04B10/071
Abstract: A transmitting apparatus connected via an optical branching apparatus to an optical communication device group includes a control unit that for each periodic transmission period including a first transmission period with a test period in which the optical communication device group is not allowed to transmit optical signals and a second transmission period without the test period, allows the optical communication device group to transmit the optical signals during a period different from the test period; a test light sending unit that sends test light to the optical branching apparatus during the test period; a light receiving unit that receives optical signals transmitted from the optical communication device group, and reflected light of the sent test light; a measuring unit that measures intensity of the reflected light received at different elapsed times after the test light is sent; and an output unit that outputs information based on the measured intensity.
Abstract translation: 经由光分支装置连接到光通信装置组的发送装置包括控制单元，对于每个周期性的传输周期，包括具有不允许光通信设备组发送光信号的测试周期的第一传输周期，以及 没有测试周期的第二传输周期允许光通信设备组在与测试周期不同的时间段内传输光信号; 测试光发送单元，在测试期间将测试光发送到光分支设备; 光接收单元，其接收从光通信设备组发送的光信号和所发送的测试光的反射光; 测量单元，其测量在发射测试光之后在不同经过时间接收的反射光的强度; 以及输出单元，其基于测量的强度输出信息。
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公开(公告)号：US20250155738A1
公开(公告)日：2025-05-15
申请号：US18910343
申请日：2024-10-09
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
Abstract: An optical device includes a first chip and a second chip that has a material having a high electro-optic effect. The first chip includes a first waveguide propagating a beam from a first port, a first branched waveguide propagating the beam from the first waveguide, a turned-back parallel waveguide connecting with the first branched waveguide, and a first parallel waveguide propagating the beam from the turned-back parallel waveguide. The first chip includes a second waveguide propagating a beam from a second port, a second branched waveguide propagating the beam from the second waveguide, and a phase adjustor adjusting a phase of the beam propagating in the first branched waveguide. The second chip includes a second parallel waveguide coupling the first parallel waveguide and the second branched waveguide, and a phase modulator adjusting a phase of the beam propagating in the second parallel waveguide.
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公开(公告)号：US20250102736A1
公开(公告)日：2025-03-27
申请号：US18776536
申请日：2024-07-18
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
IPC: G02B6/293
Abstract: A 90-degree hybrid circuit includes a first and a second waveguide in each of which signal light split by a first coupler propagates. The circuit includes a third and a fourth waveguide in each of which local oscillator light split by a second coupler propagates, and a third coupler that multiplexes the signal light propagated through the first waveguide and the local oscillator light propagated through the third waveguide. The circuit includes a fourth coupler that multiplexes the signal light propagated through the second waveguide and the local oscillator light propagated through the fourth waveguide, and a phase adjustor that adjusts a phase of light propagating through at least one waveguide from among the first to the fourth waveguides. A first total value of optical lengths of the first and the fourth waveguide is shorter than a second total value of optical lengths of the second and the third waveguide.
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公开(公告)号：US20250035851A1
公开(公告)日：2025-01-30
申请号：US18746486
申请日：2024-06-18
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Yurika YANADA , Nobuaki MITAMURA
IPC: G02B6/30
Abstract: An optical device includes an optical element and an optical fiber block. The optical element includes an optical waveguide, a first end face on which an end face of the optical waveguide is disposed, and a second end face protruding from the first end face. The optical fiber block includes an optical fiber, a third end face on which an end face of the optical fiber is disposed, and a fourth end face recessed from the third end face. In the optical device, in a state where the second end face and the fourth end face are fixed so as to be in contact with each other, the first end face and the third end face are connected by butt coupling to optically couple the end face of the optical waveguide and the end face of the optical fiber.
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Patent Agency Ranking
公开(公告)号：US12184338B2
公开(公告)日：2024-12-31
申请号：US17991263
申请日：2022-11-21
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Akira Oka
Abstract: An optical 90-degree hybrid includes two splitters, two combiners and four arm waveguides that connect output ports of the splitters and input ports of the combiners. Each of the splitters, the arm waveguides, and the combiners is a part of an optical waveguide. The optical waveguide is configured so that the phase error generated in the splitters due to wavelength change is suppressed by the phase error generated in the arm waveguides due to the wavelength change. The optical waveguide is further configured so that the phase error generated in the splitters due to deviation of a structure parameter from a certain value (e.g., design value) is suppressed by the phase error generated in the arm waveguides due to the deviation.
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公开(公告)号：US20240377594A1
公开(公告)日：2024-11-14
申请号：US18626932
申请日：2024-04-04
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Akira OKA
Abstract: An optical device includes a first channel waveguide, a second channel waveguide, a slab generator, and a rib waveguide connected to the slab generator. The second channel waveguide includes a first connection connected to the first channel waveguide and a second connection connected to the slab generator, and the second channel waveguide is wider at the second connection than at the first connection. A slab region of the slab generator includes a third connection connected to the rib waveguide, and the slab region widens from the second connection of the second channel waveguide toward the third connection. The effective refractive indexes of the waveguide modes at the first connection are larger in the order of TE0, TM0, and TE1, meanwhile the effective refractive indexes of the waveguide modes at the second and third connections are larger in the order of TE0, TE1, and TM0.
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公开(公告)号：US20240310577A1
公开(公告)日：2024-09-19
申请号：US18431589
申请日：2024-02-02
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Masaki SUGIYAMA
IPC: G02B6/122
CPC classification number: G02B6/1228
Abstract: An optical device includes a substrate, a first layer provided on the substrate on a side away from the substrate, a second layer provided on the substrate on a side closer to the substrate, and a third layer provided between the first layer and the second layer. The optical device includes a first waveguide arranged in the first layer, a second waveguide arranged in the second layer, a third waveguide arranged in the third layer, and a fourth waveguide arranged between the second layer and the substrate. The third waveguide is arranged at a position in which at least the first waveguide and a part of the second waveguide are overlapped in a surface direction of the substrate, and has a structure in which a width of the third waveguide is set to be narrower than a width of each of the first waveguide and the second waveguide.
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99.发明授权公开(公告)号：US12085752B2
公开(公告)日：2024-09-10
申请号：US17880261
申请日：2022-08-03
Applicant: FUJITSU OPTICAL COMPONENTS LIMITED
Inventor： Hoshihiko Toda
CPC classification number: G02B6/125 , G02B6/1228
Abstract: An optical waveguide device has a function of removing or suppressing a higher-order mode component of propagating light. The optical waveguide device includes a curved waveguide having a curved shape where a curvature continuously changes. A first waveguide is coupled to one end of the curved waveguide and a second waveguide is coupled to the other end of the curved waveguide. A curvature of the first waveguide and the curvature of the curved waveguide are equal to each other in a coupling point in which the first waveguide is coupled to the curved waveguide, and a curvature of the second waveguide and the curvature of the curved waveguide are equal to each other in a coupling point in which the second waveguide is coupled to the curved waveguide.
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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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