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公开(公告)号：US09798084B2
公开(公告)日：2017-10-24
申请号：US15354643
申请日：2016-11-17
Applicant: Google Inc.
Inventor： Lieven Verslegers , Ryohei Urata
CPC classification number: G02B6/124 , G02B6/12 , G02B6/126 , G02B6/2706 , G02B6/2773 , G02B6/30 , G02B6/34 , G02B2006/12061 , G02B2006/12104
Abstract: This disclosure provides systems, methods, and apparatus for a photonic chip. The photonic chip includes one or more electronic components in addition to one or more optical components. An optical coupler can be utilized for coupling external optical fibers or sources with the optical components. The optical coupler can include a beam splitter for splitting an incident light having both trans-electric (TE) and trans-magnetic (TM) polarizations into two beams having only TE and TM polarizations. The light beam with TM polarization is incident on a grating coupler on the chip having a horn section, which includes gratings. The light beam is reflected onto the grating coupler such that the direction of TM polarization is within the first plane of incidence, and the first beam of light is incident on the first plurality of gratings at an angle with respect to a normal to the plane of the first grating coupler.
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公开(公告)号：US20170146736A1
公开(公告)日：2017-05-25
申请号：US15354643
申请日：2016-11-17
Applicant: Google Inc.
Inventor： Lieven Verslegers , Ryohei Urata
CPC classification number: G02B6/124 , G02B6/12 , G02B6/126 , G02B6/2706 , G02B6/2773 , G02B6/30 , G02B6/34 , G02B2006/12061 , G02B2006/12104
Abstract: This disclosure provides systems, methods, and apparatus for a photonic chip. The photonic chip includes one or more electronic components in addition to one or more optical components. An optical coupler can be utilized for coupling external optical fibers or sources with the optical components. The optical coupler can include a beam splitter for splitting an incident light having both trans-electric (TE) and trans-magnetic (TM) polarizations into two beams having only TE and TM polarizations. The light beam with TM polarization is incident on a grating coupler on the chip having a horn section, which includes gratings. The light beam is reflected onto the grating coupler such that the direction of TM polarization is within the first plane of incidence, and the first beam of light is incident on the first plurality of gratings at an angle with respect to a normal to the plane of the first grating coupler.
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公开(公告)号：US20170153391A1
公开(公告)日：2017-06-01
申请号：US15354655
申请日：2016-11-17
Applicant: Google Inc.
Inventor： Lieven Verslegers , Ryohei Urata , Hong Liu
CPC classification number: G02B6/124 , G02B6/12 , G02B6/126 , G02B6/30 , G02B6/34 , G02B6/4246 , G02B2006/12102 , G02B2006/12121 , G02B2006/12142 , G02B2006/12147 , G02B2006/12164 , H04B10/2504 , H04B10/40
Abstract: This disclosure provides systems, methods, and apparatus for a photonic chip. The photonic chip includes one or more electronic components in addition to one or more optical components. Grating couplers can be utilized for coupling light incident from an optical fibers or lasers with the optical components on the photonic chip. The grating couplers can be designed to have a wide bandwidth to support applications such as wave division multiplexing (WDM). The wide bandwidth can be achieved by reducing a mode field diameter (MFD) of the light beams incident on the grating couplers, and selecting a beam size of the optical couplers to be substantially equal to MFD. The bandwidth can be further improved by using thin silicon layer for fabricating the ridges of the grating coupler. Grating couplers with relatively large beam sizes can be utilized for coupling light output by lasers with the optical components on the chip.
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