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公开(公告)号：US20220376107A1
公开(公告)日：2022-11-24
申请号：US17817384
申请日：2022-08-04
申请人： II-VI Delaware, Inc.
摘要： There is disclosed a method for manufacturing a MOSFET with lateral channel in SiC, said MOSFET comprising simultaneously formed n type regions comprising an access region and a JFET region defining the length of the MOS channel, and wherein the access region and the JFET region are formed by ion implantation by using one masking step. The design is self-aligning so that the length of the MOS channel is defined by simultaneous creating n-type regions on both sides of the channel using one masking step. Any misalignment in the mask is moved to other less critical positions in the device. The risk of punch-through is decreased compared to the prior art. The current distribution becomes more homogenous. The short-circuit capability increases. There is lower Drain-Source specific on-resistance due to a reduced MOS channel resistance. There is a lower JFET resistance due to the possibility to increase the JFET region doping concentration.
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公开(公告)号：US20220368446A1
公开(公告)日：2022-11-17
申请号：US17664714
申请日：2022-05-24
申请人： II-VI Delaware, Inc.
发明人： Peigang HU , Yajun WANG
摘要： Coherent optical multiplexing 1+1 protection disclosed herein uses multiplexers, each having multiplexing and demultiplexing sub-units. Relay ports of a node are connected with the multiplexers, and each relay port is configured to input and output optical signals with the corresponding multiplexer. Two transmission ports of the node are connected with disjoint paths and are configured to input and output optical signals therewith. The node includes: a first optical splitter having input ports connected with the relay ports and two output ports connected with the two transmission ports; an optical switch connected with the transmission ports respectively via two input interfaces; a second optical splitter, which is a 1×N optical splitter, having one input port connected with an output interface of the optical switch and having output ports connected with the relay ports. The solution is reliable in implementation, has low insertion loss, and has good transmission performance.
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公开(公告)号：US20220365339A1
公开(公告)日：2022-11-17
申请号：US17317059
申请日：2021-05-11
申请人： II-VI Delaware, Inc
发明人： Jiang-Huai ZHOU , Glenn D BARTOLINI
摘要： An optoelectronic device, including a tunable optical filter or tunable optical filter with photodiode, uses voltage differentials to filter an optical signal passing along an optical path. A membrane has an electrode and is disposed adjacent a fixed mirror and another. A central portion of the membrane is distanced from the fixed mirror and has an aperture in which a second mirror is disposed. This second mirror translates with the membrane at a freespace gap relative to the fixed mirror when the electrodes are subject to the voltage differentials. In turn, the freespace gap is configured as a Fabry-Perot etalon to pass one or more spectral frequencies of the optical signal along the optical path. The membrane is shaped and reinforced to limit possible bowing. The translatable mirror in the aperture of the membrane is also shaped and reinforced to limit it from possible bowing as well.
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公开(公告)号：US20220353162A1
公开(公告)日：2022-11-03
申请号：US17811832
申请日：2022-07-11
申请人： II-VI Delaware, Inc.
IPC分类号： H04L43/0852 , H04B10/077 , H04B10/079
摘要： A method for determining timing information in an optical communication link includes transmitting a falling edge from a transceiver positioned at a near end of the optical communication link and simultaneously starting a first timer at the transceiver positioned at the near end of the link. The transmitted falling edge is received at a transceiver positioned at a far end of the link. A falling edge is transmitted from the transceiver positioned at the far end of the link after a response delay. The transmitted falling edge is received at the transceiver positioned at the near end of the link while the first timer is simultaneously terminated at the transceiver positioned at the near end of the link and the elapsed time is recorded. The total link delay is determined based on the elapsed time.
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公开(公告)号：US20220321212A1
公开(公告)日：2022-10-06
申请号：US17806892
申请日：2022-06-14
申请人： II-VI Delaware, Inc.
IPC分类号： H04B10/071 , H04B10/25
摘要： Modules for optical time-domain reflectometry (OTDR) are connected via at least one fiber link of a fiber optic communication network. The modules can perform OTDR operations on the at least one fiber link. In addition, the modules can establish an inter-node communication channel between each other on the at least one fiber link. The channel allows the OTDR modules to synchronize their OTDR operations and to exchange information, such as OTDR traces, between each other.
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公开(公告)号：US20220291427A1
公开(公告)日：2022-09-15
申请号：US17652362
申请日：2022-02-24
申请人： II-VI Delaware, Inc.
IPC分类号： G02B5/02 , G02F1/1335 , F21K9/69 , H01L33/60 , F21K9/68
摘要： Incident optical signals propagate within a diffuser substrate and impinge upon an optical diffuser within the diffuser substrate or on its output surface. The optical diffuser redirects or transforms respective portions of each incident signal into corresponding forward- and backward-directed optical signals. The backward-directed signals are redirected or transformed into additional incident signals, and so on. The forward-directed optical signals collectively form the optical output of an illumination source that exhibits reduced speckle. The illumination source can include multiple laser sources formed on or attached to an input surface of the diffuser substrate.
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公开(公告)号：US20220269009A1
公开(公告)日：2022-08-25
申请号：US17663135
申请日：2022-05-12
申请人： II-VI Delaware, Inc.
发明人： Chunyan Jia , Peng Xiao , Zhihua Song , Yingying Liu , Jin'E Hua
摘要： The present disclosure provides a MEMS-based variable optical attenuator (VOA) array, sequentially including an optical fiber array, a micro-lens array, and a MEMS-based micro-reflector array to form a VOA array having several optical attenuation units. The MEMS-based micro-reflectors can change the propagation direction of a beam, causing a misalignment coupling loss to the beam and thereby achieving optical attenuation, with a broad range of dynamic attenuation, low polarization dependent loss and wavelength dependent loss, good repeatability, short response time (at the millisecond level), etc. Arrayed device elements are used as assembly units of the present disclosure, and the assembly of arrayed elements facilitates tuning in batches. Accordingly, automation levels are improved, and the production costs are reduced.
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公开(公告)号：US11425013B2
公开(公告)日：2022-08-23
申请号：US17073078
申请日：2020-10-16
申请人： II-VI Delaware, Inc.
IPC分类号： H04L43/08 , H04L43/0852 , H04B10/077 , H04B10/079
摘要： A method for determining timing information in an optical communication link includes transmitting a falling edge from a transceiver positioned at a near end of the optical communication link and simultaneously starting a first timer at the transceiver positioned at the near end of the link. The transmitted falling edge is received at a transceiver positioned at a far end of the link. A falling edge is transmitted from the transceiver positioned at the far end of the link after a response delay. The transmitted falling edge is received at the transceiver positioned at the near end of the link while the first timer is simultaneously terminated at the transceiver positioned at the near end of the link and the elapsed time is recorded. The total link delay is determined based on the elapsed time.
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公开(公告)号：US11422429B1
公开(公告)日：2022-08-23
申请号：US17236009
申请日：2021-04-21
申请人： II-VI Delaware, Inc.
发明人： Qingyu Li , Jack R. Kelly , Guomin Jiang , Haiji J. Yuan , Yimin Ji , Helen Chen
摘要： A voltage-controlled optical wedge is formed by creating an adjustable voltage gradient along the length of a relatively large-sized LC cell. A pair of bias voltages (AC voltages) are applied at the opposing side terminations of the LC cell, their RMS values selected to create a continuous phase variation along the length of the cell, where a defined phase variation is associated with a specific beam steering angle. Adjustments in the applied bias voltages (specifically, changes in the RMS values of the bias voltages) result in changing the beam steering angle, providing for active, controllable beam steering as a function of time. The LC cell may be configured to provide either a linear or nonlinear continuous phase variation, as preferred for different beam steering applications.
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公开(公告)号：US20220263489A1
公开(公告)日：2022-08-18
申请号：US17661668
申请日：2022-05-02
申请人： II-VI Delaware, Inc.
发明人： Wen-Qing XU , Di Lan , Christopher S. Koeppen
摘要： A bulk acoustic resonator operable in a bulk acoustic mode includes a resonator body mounted to a separate carrier that is not part of the resonator body. The resonator body includes a piezoelectric layer, a device layer, and a top conductive layer on the piezoelectric layer opposite the device layer. The piezoelectric layer is a single crystal of LiNbO3 cut at an angle of 130°±30°. A surface of the device layer opposite the piezoelectric layer is for mounting the resonator body to the carrier.
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