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Patent Agency Ranking
公开(公告)号：US12197002B2
公开(公告)日：2025-01-14
申请号：US17519424
申请日：2021-11-04
Inventor： Young-Tak Han , Seoktae Kim , Sang Ho Park , Yongsoon Baek , Jang Uk Shin , Seok Jun Yun , Seo Young Lee
Abstract: Disclosed are a heterogeneously integrated optical modulator and a manufacturing method thereof. The modulator includes a substrate having a trench, an input waveguide disposed at one side of the trench, an output waveguide disposed at the other side of the trench, a first Mach-Zehnder interferometer including first branch waveguides disposed between the input waveguide and the output waveguide and a heater disposed on one of the first branch waveguides, and second Mach-Zehnder interferometers connected to each of the first branch waveguides.
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公开(公告)号：US10809457B2
公开(公告)日：2020-10-20
申请号：US16373551
申请日：2019-04-02
Inventor： Seo Young Lee , Young-Tak Han
Abstract: Provided is an optical circuit element, and more particularly, is an optical circuit element that splits one optical signal into two polarization signals, or couples two polarization signals into one optical signal. The optical circuit element includes a plurality of input couplers to which an optical signal is input, a plurality of output couplers from which an optical signal is output, a first path and a second path configured to connect the input couplers and the second couplers to each other, and at least one wave plate.
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公开(公告)号：US09893810B2
公开(公告)日：2018-02-13
申请号：US15133945
申请日：2016-04-20
Inventor： Seo Young Lee , Young Tak Han , Jong Hoi Kim , Joong Seon Choe , Chun Ju Youn , Hyun Do Jung
IPC: H01L31/0232 , H04B10/25 , G02B6/00
CPC classification number: H04B10/2504 , G02B6/00 , G02B6/4249 , G02B6/4279
Abstract: There is provided a receiver optical module including a photodetector having a plurality of channels, a capacitor disposing block formed on an upper portion of the photodetector, a plurality of capacitors formed on the capacitor disposing block, and an electrical wiring configured to connect the plurality of capacitors to electrodes of a plurality of channels of the photodetector, wherein the plurality of capacitors are formed on the capacitor disposing block such that distance between the capacitors and the electrodes of the corresponding channels are the same. Distortion and loss of signal characteristics of high frequency can be reduced and quality of a signal can be enhanced.
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公开(公告)号：US11381315B2
公开(公告)日：2022-07-05
申请号：US17156073
申请日：2021-01-22
Inventor： Young-Tak Han , Seok Jun Yun , Seoktae Kim , Sang Ho Park , Yongsoon Baek , Jang Uk Shin , Seo Young Lee
Abstract: Disclosed is an optical transmitter module including a directly modulated laser transmitter based on a directly modulated laser (DML) and an arrayed waveguide grating (AWG) chip that is vertically polished. The directly modulated laser transmitter includes a directly modulated laser chip array including one or more directly modulated laser chips, an impedance matching circuit that allows each of the one or more directly modulated laser chips to operate at a critical speed of 100 Gbps per channel or higher, and a radio frequency-flexible printed circuit board (RF-FPCB) that transmits a radio frequency (RF) modulating signal to the directly modulated laser chip array. The arrayed waveguide grating chip includes an optical waveguides that transfer multi-channel optical signals and a wavelength multiplexer that multiplexes the multi-channel optical signals. The directly modulated laser transmitter and the arrayed waveguide grating chip are spaced apart from each other and are optically coupled in chip-to-chip.
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公开(公告)号：US11005570B2
公开(公告)日：2021-05-11
申请号：US16846948
申请日：2020-04-13
Inventor： Seo Young Lee , Young-Tak Han , Jong-Hoi Kim
Abstract: Provided are a coherent optical receiver and a fabrication method thereof, the coherent optical receiver including a substrate, signal and local input waveguides extending in a first direction parallel to a top surface of the substrate and configured to receive an optical signal, a first optical circuit element including a first optical waveguide connected to the signal input waveguide and a trench provided in one side of the first optical waveguide in parallel to the first direction, a second optical circuit element including a second optical waveguide connected to the first optical waveguide, a slit crossing the second optical waveguide, and a wavelength plate inserted to the slit, and third optical circuit elements connected to the second optical circuit element, wherein the first to third optical circuit elements are monolithically integrated in the substrate.
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