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公开(公告)号：US20140205229A1
公开(公告)日：2014-07-24
申请号：US13911550
申请日：2013-06-06
Applicant: EOSpace Inc.
Inventor： Suwat Thaniyavarn
IPC: G02F1/225
CPC classification number: G02F1/225 , G02F1/0316 , G02F1/0356 , G02F1/2255 , G02F2001/212 , G02F2201/127
Abstract: Improved optical interferometric modulators have a small waveguide spacing so that the waveguide pair are close to the central electrode, to enhance electro-optic interaction. Asymmetric waveguides with differential indices are used to effectively de-couple the waveguide pair. Multiple sections of asymmetric waveguide pairs with alternating differential indices are used to achieve chirp-free operation. Another version of the device utilizes transmission-line electrode that weave closer to one of the waveguide pair alternately between sections. Another version of the device utilizes waveguide structure that one of the waveguide is closer to the central electrode in alternate section. To improve efficiency further, a DC bias is provided on the outer electrodes configured as an RF-ground but DC-float electrodes. Another improvement is to have a slot is cut underneath the waveguide region to effectively reduce to thickness of the substrate. These improvements lead to higher modulator efficiency.
Abstract translation: 改进的光学干涉式调制器具有小的波导间隔，使得波导对靠近中心电极，以增强电光相互作用。 使用具有差分指数的非对称波导来有效地去耦合波导对。 使用具有交替差分指数的不对称波导对的多个部分来实现无啁啾操作。 该器件的另一个版本利用传输线电极，它们在部分之间交替地编织在波导对中的一个上。 该器件的另一个版本使用波导结构，其中一个波导在交替部分更靠近中心电极。 为了进一步提高效率，在被配置为RF接地但DC浮子电极的外部电极上提供DC偏压。 另一个改进是在波导区域下面切割槽以有效地减小到衬底的厚度。 这些改进导致更高的调制器效率。
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公开(公告)号：US11841562B1
公开(公告)日：2023-12-12
申请号：US16551786
申请日：2019-08-27
Applicant: Eospace Inc.
Inventor： David Emil Moilanen , Suwat Thaniyavarn , Walter Charczenko
CPC classification number: G02F1/0316 , G02F1/035 , G02F1/0356 , G02F2202/20 , G02F2203/50
Abstract: Electro-optic modulation of multiple phase modulator waveguides with a single electrode is made possible by determining places of equal electric field strength. Substrate extensions support edges of a wide hot electrode and ground electrodes equally spaced from the wide hot electrodes. Waveguides are positioned in the extensions separated from the electrodes by buffer layers. A wide microstrip hot electrode on a buffer layer, wider substrate and ground has multiple waveguides in the substrate below the buffer layer. A thinned substrate has a microstrip hot electrode and spaced coplanar grounds with multiple waveguides located on both sides. Decreasing substrate thickness flattens the electric field strength between the electrodes and allows multiple waveguides located between the central hot and outer ground electrodes. Adjacent waveguides with different asymmetric waveguide index portion staged along their length eliminate cross talk.
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公开(公告)号：US11385517B1
公开(公告)日：2022-07-12
申请号：US15821110
申请日：2017-11-22
Applicant: EOSpace Inc.
Inventor： Suwat Thaniyavarn
Abstract: A Dual-polarization optical modulator that can be used to modulate light in both polarization states, in which the operating points of each polarization state can be set at any arbitrary point independently from each other. A novel architecture for an optically-controlled Phased-array beam forming system utilizing this unique dual-polarization is proposed to facilitate simple and practical implementation.
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公开(公告)号：US10018888B2
公开(公告)日：2018-07-10
申请号：US13911550
申请日：2013-06-06
Applicant: EOSpace Inc.
Inventor： Suwat Thaniyavarn
CPC classification number: G02F1/225 , G02F1/0316 , G02F1/0356 , G02F1/2255 , G02F2001/212 , G02F2201/127
Abstract: Improved optical interferometric modulators have a small waveguide spacing so that the waveguide pair are close to the central electrode, to enhance electro-optic interaction. Asymmetric waveguides with differential indices are used to effectively de-couple the waveguide pair. Multiple sections of asymmetric waveguide pairs with alternating differential indices are used to achieve chirp-free operation. Another version of the device utilizes transmission-line electrode that weave closer to one of the waveguide pair alternately between sections. Another version of the device utilizes waveguide structure that one of the waveguide is closer to the central electrode in alternate section. To improve efficiency further, a DC bias is provided on the outer electrodes configured as an RF-ground but DC-float electrodes. Another improvement is to have a slot is cut underneath the waveguide region to effectively reduce to thickness of the substrate. These improvements lead to higher modulator efficiency.
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