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公开(公告)号：US10090934B2
公开(公告)日：2018-10-02
申请号：US15347193
申请日：2016-11-09
发明人： Hiroshi Hara , Masanobu Kawamura , Takahiro Saito
摘要： An optical receiver module that receives a wavelength-multiplexed optical signal is disclosed. The optical receiver module includes a first lens, an optical de-multiplexer, second lenses, and photodiodes. The first lens forms a beam waist of the wavelength-multiplexed optical signal output therefrom. The optical de-multiplexer de-multiplexes the wavelength-multiplexed optical signal into optical signals depending on wavelengths thereof and is installed so as to make optical paths for respective optical signals different from each other. The second lenses concentrate the optical signals onto the respective photodiodes. In the optical receiver module, the beam waist of the wavelength-multiplexed optical signal is set in a halfway between a longest path and a shortest path from the first lens to the second lenses.
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公开(公告)号：US20170212320A1
公开(公告)日：2017-07-27
申请号：US15415636
申请日：2017-01-25
发明人： Hiroshi Hara
CPC分类号： G02B6/4245 , G02B6/29367 , G02B6/2938 , G02B6/4206 , G02B6/4214 , G02B6/4215 , G02B6/4246 , G02B6/425 , G02B6/4257 , G02B6/428 , H04B10/69 , H04J14/02
摘要： An optical receiver module that recovers signals from a wavelength multiplexed optical signal is disclosed. The optical receiver module includes photodiodes (PDs) arranged in an array by a pitch, an amplifier that integrates trans-impedance amplifiers (TIAs) each corresponding to the PDs, and a sub-mount that mounts the PDs thereon. The sub-mount provides metal patterns on which the PDs are mounted by the flip-chip bonding. The metal patterns compensate a difference between the pitch of the arrayed PDs and another pitch of the TIAs in the amplifier as maintaining the characteristic impedance thereof substantially equal to each other.
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公开(公告)号：US12104950B2
公开(公告)日：2024-10-01
申请号：US18259598
申请日：2022-01-14
发明人： Hiroshi Hara , Kosuke Okawa
CPC分类号： G01J1/44 , H03F3/45475 , H04B10/60 , H04B10/67 , H05K1/0231 , H05K1/181 , H05K2201/10121
摘要： An optical receiver according to one embodiment includes a transimpedance amplifier including a first pad, a second pad provided on an insulating layer, connected to a cathode wiring layer through a first via, arranged at a position interposing the first pad, and connected to a first cathode pad of a light-receiving element, and a third pad connected to the second cathode pad of the light-receiving element. The light-receiving element is connected to an anode pad mounted on the transimpedance amplifier and connected through an anode electrode and an anode wiring pattern provided on a surface facing the transimpedance amplifier and a first cathode pad and a second cathode pad connected through a cathode electrode and a cathode wiring pattern and arranged at positions interposing the anode pad.
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公开(公告)号：US11901946B2
公开(公告)日：2024-02-13
申请号：US17779673
申请日：2021-06-11
IPC分类号： H04B10/50 , H04B10/564 , G02B6/42 , G02B7/00
CPC分类号： H04B10/501 , G02B6/4286 , G02B7/008 , H04B10/564
摘要： An optical transmitter according to one embodiment includes a housing with an emission end, a light emitting element mounted on a first mounting portion of the housing, and a light receiving element mounted on a second mounting portion of the housing to monitor output light from the light emitting element. The second mounting portion is provided with a carrier, a first resin located on an emission end side of a lower side of the carrier, and a second resin located on a light emitting element side of the lower side of the carrier. A coefficient of thermal expansion of the first resin is smaller than a coefficient of thermal expansion of the second resin.
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公开(公告)号：US11327256B2
公开(公告)日：2022-05-10
申请号：US17163012
申请日：2021-01-29
发明人： Hiroyasu Oomori , Hiroshi Hara
摘要： A package for optical receiver module includes a conductive housing and a feedthrough. The conductive housing includes a first sidewall having an optical port for receiving an optical signal along an optical axis, a second sidewall separated from the first sidewall along the optical axis, and an interior space for housing a photodetector. The feedthrough includes first to third layers extending from the second sidewall to an opposite direction of the first sidewall, and the third layer is provided between the first and second layers. The feedthrough includes first to fourth wirings, a grounding wiring, and a plurality of first conductive cells. The first and second wirings face the interior space. The third wirings, the fourth wiring, the grounding wiring are formed in the first layer or the second layer. The plurality of first conductive cells are arranged in the third layer, and are electrically connected to the grounding wiring.
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公开(公告)号：US11067762B2
公开(公告)日：2021-07-20
申请号：US16775322
申请日：2020-01-29
发明人： Hiroshi Hara
摘要： An optical module according to an aspect of the present disclosure includes a substrate having a base plane, an optical circuit element having an optical waveguide and a reflector, a support member, a photo detector mounted on the base plane, the photo detector including a condenser lens and a light-receiving layer. The light beam travels along an optical path from the reflector to the tangent plane, the optical path having a shortest distance set to be smaller than a preset value, and as viewed from a direction perpendicular to the base plane, the light beam has an optical axis set apart from the top of the condenser lens by an offset distance.
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公开(公告)号：US10707970B2
公开(公告)日：2020-07-07
申请号：US16152566
申请日：2018-10-05
发明人： Kazuaki Mii , Hiroshi Hara , Fumihiro Nakajima
摘要： A wavelength de-multiplexing system that receives a wavelength multiplexed signal and generates electrical signals corresponding to the optical signals is disclosed. The optical receiver module includes a lens, a lens unit, and an optical de-multiplexer (O-DeMux). The lens converts the wavelength multiplexed signal into a quasi-collimated beam. The lens unit narrows a diameter of the quasi-collimated beam. The O-DeMux de-multiplexes the narrowed quasi-collimated beam coming from the lens unit by wavelength selective filters (WSFs) each having optical distances from the lens unit different from each other.
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公开(公告)号：US10432339B2
公开(公告)日：2019-10-01
申请号：US16150332
申请日：2018-10-03
发明人： Masanobu Kawamura , Hiroshi Hara
摘要： A process of assembling an optical receiver module that receives a wavelength multiplexed signal is disclosed. The process includes a step of sequentially mounting a wavelength selective filter (WSF), a prism, a mirror, and first and second optical de-multiplexers (o-DeMuxes) each on the carrier. The WSF transmits a first wavelength multiplexed signal but reflects a second wavelength multiplexed signal. The prism includes first and second surfaces, where the first surface reflects the wavelength multiplexed signal toward the WSF, while the second surface receives a second wavelength multiplexed signal coming from the WSF. The mirror reflects the first wavelength multiplexed signal transmitting through the WSF. The first and second o-DeMuxes de-multiplex the first and second wavelength multiplexed signals.
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公开(公告)号：US20190212508A1
公开(公告)日：2019-07-11
申请号：US16245303
申请日：2019-01-11
发明人： Hiroshi Hara
IPC分类号： G02B6/42 , H01S5/022 , G02B6/43 , H01L23/495
摘要： An optical module that provides a bridge substrate for carrying a driving signal from a wiring substrate to a laser diode (LD) element is disclosed. The optical module provides a carrier, first and second assemblies, and the bridge substrate. The first assembly, which includes the LD element, stacks a first compensating substrate and a semiconductor substrate on the carrier, where the semiconductor substrate includes the LD element. The second assembly stacks a second compensating substrate and the wiring substrate on the carrier. The first compensating substrate is made of a material same with a material of the wiring substrate and has a thickness same with that of the wiring substrate. The second compensating substrate is made of a material same with a material of the semiconductor substrate and has a thickness same with that of the semiconductor substrate.
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公开(公告)号：US20190103936A1
公开(公告)日：2019-04-04
申请号：US16150332
申请日：2018-10-03
发明人： Masanobu Kawamura , Hiroshi Hara
CPC分类号： H04J14/0215 , G02B6/42 , H04B10/60 , H04B10/675 , H04J14/02 , H04J14/0261
摘要： A process of assembling an optical receiver module that receives a wavelength multiplexed signal is disclosed. The process includes a step of sequentially mounting a wavelength selective filter (WSF), a prism, a mirror, and first and second optical de-multiplexers (o-DeMuxes) each on the carrier. The WSF transmits a first wavelength multiplexed signal but reflects a second wavelength multiplexed signal. The prism includes first and second surfaces, where the first surface reflects the wavelength multiplexed signal toward the WSF, while the second surface receives a second wavelength multiplexed signal coming from the WSF. The mirror reflects the first wavelength multiplexed signal transmitting through the WSF. The first and second o-DeMuxes de-multiplex the first and second wavelength multiplexed signals.
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