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公开(公告)号：US10302866B2
公开(公告)日：2019-05-28
申请号：US15962619
申请日：2018-04-25
Applicant: Finisar Corporation
Inventor： Shiyun Lin , Bryan Park
Abstract: Various embodiments relate to polarization splitters. A polarization splitter may include a silicon nitride (SiN) waveguide core configured to receive an input light signal having a first polarization mode and a second polarization mode. The polarization splitter may further include a silicon (Si) slot waveguide core disposed proximate the SiN waveguide core. The Si slot waveguide core may include a tapered portion at a first end configured to couple the first polarization mode to the Si slot waveguide.
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公开(公告)号：US20190129096A1
公开(公告)日：2019-05-02
申请号：US16195804
申请日：2018-11-19
Applicant: FINISAR CORPORATION
Inventor： Daniel Mahgerefteh , Bryan Park
CPC classification number: G02B6/1228 , G02B6/125 , G02B6/2726 , G02B6/305 , G02B2006/12061 , G02B2006/1209 , G02B2006/12147
Abstract: An optical system includes a silicon (Si) substrate, a buried oxide (BOX) layer formed on the substrate, a silicon nitride (SiN) layer formed above the BOX layer, and a SiN waveguide formed in the SiN layer. In some embodiments, the optical system may additionally include an interposer waveguide adiabatically coupled to the SiN waveguide to form a SiN-interposer adiabatic coupler that includes at least the tapered section of the SiN waveguide, the optical system further including at least one of: a cavity formed in the Si substrate at least beneath the SiN-interposer adiabatic coupler or an oxide overlay formed between a top of a SiN core of the SiN waveguide and a bottom of the interposer waveguide. Alternatively or additionally, the optical system may additionally include a multimode Si—SiN adiabatic coupler that includes a SiN taper of a SiN waveguide and a Si taper of a Si waveguide.
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公开(公告)号：US10768366B2
公开(公告)日：2020-09-08
申请号：US16559474
申请日：2019-09-03
Applicant: FINISAR CORPORATION
Inventor： Bryan Park , Daniel Mahgerefteh , Zheng Yong , Joyce Kai See Poon
Abstract: A system may include a polarization rotator combiner. The polarization rotator combiner may include a first stage, a second stage, and a third stage. The first stage may receive a first component of light with a TE00 polarization and a second component of light with the TE00 polarization. The first stage may draw optical paths of the first and second components together. The second stage may receive the first component and the second component from the first stage. The second stage may convert the polarization of the second component from the TE00 polarization to a TE01 polarization. The third stage may receive the first component and the second component from the second stage. The third stage may convert polarization of the second component from the TE01 polarization to a TM00 polarization. The third stage may output the first component and output the second component.
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公开(公告)号：US10261251B2
公开(公告)日：2019-04-16
申请号：US15692793
申请日：2017-08-31
Applicant: FINISAR CORPORATION
Inventor： Daniel Mahgerefteh , Bryan Park , Jianxiao Chen , Xiaojie Xu , Gilles P. Denoyer , Bernd Huebner
IPC: G02B6/12 , G02B6/122 , G02B6/136 , G02B6/124 , G02B6/126 , G02B6/27 , G02B6/125 , G02B6/30 , G02B6/42
Abstract: In an example, a photonic system includes a Si PIC with a Si substrate, a SiO2 box formed on the Si substrate, a first layer, and a second layer. The first layer is formed above the SiO2 box and includes a SiN waveguide with a coupler portion at a first end and a tapered end opposite the first end. The second layer is formed above the SiO2 box and vertically displaced above or below the first layer. The second layer includes a Si waveguide with a tapered end aligned in two orthogonal directions with the coupler portion of the SiN waveguide such that the tapered end of the Si waveguide overlaps in the two orthogonal directions and is parallel to the coupler portion of the SiN waveguide. The tapered end of the SiN waveguide is configured to be adiabatically coupled to a coupler portion of an interposer waveguide.
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公开(公告)号：US20190109649A1
公开(公告)日：2019-04-11
申请号：US16157946
申请日：2018-10-11
Applicant: Finisar Corporation
Inventor： Gilles P. Denoyer , Dennis Pu , Homero Guimaraes , Faraz Monifi , Bryan Park , Daniel Mahgerefteh
CPC classification number: H04B10/671 , H04B10/69
Abstract: An optical receiver with improved dynamic range may include at least one directional coupler having at least one input configured to couple to an optical fiber. The optical receiver may include a first signal path including a first photodetector coupled to an output of the at least one directional coupler, a first transimpedance amplifier (TIA) including an input coupled to the first photodetector, and an adder coupled to an output of the first TIA. The optical receiver may include a second signal path including a second photodetector coupled to an output of the at least one directional coupler, a second TIA including an input coupled to the second photodetector, and the adder coupled to an output of the second TIA. Further, the optical receiver may include an optical power sensing circuit coupled to at least one of the first TIA, the second TIA, and the adder.
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Patent Agency Ranking
公开(公告)号：US10132997B2
公开(公告)日：2018-11-20
申请号：US15596958
申请日：2017-05-16
Applicant: Finisar Corporation
Inventor： Daniel Mahgerefteh , Bryan Park
Abstract: An optical system includes a silicon (Si) substrate, a buried oxide (BOX) layer formed on the substrate, a silicon nitride (SiN) layer formed above the BOX layer, and a SiN waveguide formed in the SiN layer. In some embodiments, the optical system may additionally include an interposer waveguide adiabatically coupled to the SiN waveguide to form a SiN-interposer adiabatic coupler that includes at least the tapered section of the SiN waveguide, the optical system further including at least one of: a cavity formed in the Si substrate at least beneath the SiN-interposer adiabatic coupler or an oxide overlay formed between a top of a SiN core of the SiN waveguide and a bottom of the interposer waveguide. Alternatively or additionally, the optical system may additionally include a multimode Si—SiN adiabatic coupler that includes a SiN taper of a SiN waveguide and a Si taper of a Si waveguide.
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公开(公告)号：US20180149811A1
公开(公告)日：2018-05-31
申请号：US15826673
申请日：2017-11-29
Applicant: Finisar Corporation
Inventor： Bryan Park , Daniel Mahgerefteh , Zheng Yong , Joyce Kai See Poon
CPC classification number: G02B6/126 , G02B6/12007 , G02B6/1228 , G02B6/125 , G02B6/14 , G02B6/2726 , G02B6/2766 , G02B6/2773 , G02B6/29352 , G02B2006/12035 , G02B2006/12061 , G02B2006/12097 , G02B2006/12119 , G02B2006/1215 , G02B2006/12152
Abstract: A system may include a polarization rotator combiner. The polarization rotator combiner may include a first stage, a second stage, and a third stage. The first stage may receive a first component of light with a TE00 polarization and a second component of light with the TE00 polarization. The first stage may draw optical paths of the first and second components together. The second stage may receive the first component and the second component from the first stage. The second stage may convert the polarization of the second component from the TE00 polarization to a TE01 polarization. The third stage may receive the first component and the second component from the second stage. The third stage may convert polarization of the second component from the TE01 polarization to a TM00 polarization. The third stage may output the first component and output the second component.
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公开(公告)号：US09874691B2
公开(公告)日：2018-01-23
申请号：US15208170
申请日：2016-07-12
Applicant: Finisar Corporation
Inventor： Daniel Mahgerefteh , Bryan Park , Jianxiao Chen , Xiaojie Xu , Gilles P. Denoyer , Bernd Huebner
IPC: G02B6/00 , G02B6/122 , G02B6/136 , G02B6/124 , G02B6/126 , G02B6/27 , G02B6/125 , G02B6/30 , G02B6/12 , G02B6/42
CPC classification number: G02B6/1228 , G02B6/1221 , G02B6/1223 , G02B6/124 , G02B6/125 , G02B6/126 , G02B6/136 , G02B6/2726 , G02B6/2773 , G02B6/305 , G02B6/4208 , G02B6/4215 , G02B2006/12038 , G02B2006/12061 , G02B2006/12069 , G02B2006/12097 , G02B2006/12121 , G02B2006/12123 , G02B2006/12147 , G02B2006/12157 , G02B2006/12164
Abstract: In an example, a coupled system includes a first waveguide, at least one second waveguide, and an interposer. The first waveguide has a silicon (Si) core having first refractive index n1 and a tapered end. The at least one second waveguide each has a silicon nitride (SiN) core having a second refractive index n2. The interposer includes a third waveguide having a third refractive index n3 and a coupler portion, where n1>n2>n3. The tapered end of the first waveguide is adiabatically coupled to a coupler portion of one of the at least one second waveguide. A tapered end of one of the at least one second waveguide is adiabatically coupled to the coupler portion of the third waveguide of the interposer. The third waveguide of the interposer has an optical mode size that is similar to the mode size of a standard single mode optical fiber.
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公开(公告)号：US10797801B2
公开(公告)日：2020-10-06
申请号：US16157946
申请日：2018-10-11
Applicant: Finisar Corporation
Inventor： Gilles P. Denoyer , Dennis Pu , Homero Guimaraes , Faraz Monifi , Bryan Park , Daniel Mahgerefteh
Abstract: An optical receiver with improved dynamic range may include at least one directional coupler having at least one input configured to couple to an optical fiber. The optical receiver may include a first signal path including a first photodetector coupled to an output of the at least one directional coupler, a first transimpedance amplifier (TIA) including an input coupled to the first photodetector, and an adder coupled to an output of the first TIA. The optical receiver may include a second signal path including a second photodetector coupled to an output of the at least one directional coupler, a second TIA including an input coupled to the second photodetector, and the adder coupled to an output of the second TIA. Further, the optical receiver may include an optical power sensing circuit coupled to at least one of the first TIA, the second TIA, and the adder.
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公开(公告)号：US20200096700A1
公开(公告)日：2020-03-26
申请号：US16697037
申请日：2019-11-26
Applicant: FINISAR CORPORATION
Inventor： Bryan Park , Zheng Yong , Joyce Kai See Poon
Abstract: Various polarization rotator splitter (PRS) configurations are disclosed. In an example embodiment, a system includes a PRS that includes a silicon nitride (SiN) rib waveguide core that includes a rib and a ridge that extends vertically above the rib, the SiN rib waveguide core having a total height hSiN from a bottom of the rib to a top of the ridge, a rib height hrib from the bottom of the rib to a top of the rib, a rib width wrib, and a top width wSiN of the ridge. The rib width wrib varies along at least a portion of a length of the SiN rib waveguide core.
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