-
11.发明申请公开(公告)号：US20190229828A1
公开(公告)日：2019-07-25
申请号：US16124766
申请日：2018-09-07
Inventor： Joon Young HUH , Sae-Kyoung KANG , Joon Ki LEE
Abstract: An optical multiplexer including an optical waveguide block including a plurality of waveguides for adjusting an optical path of the plurality of optical signals. Optical signals generated in light sources having different wavelengths are input to ports of one side that is an input end of the optical waveguide block, propagated through waveguides connected to the ports, and output to ports of another side that is an output end of the optical wavelength block. Intervals between the waveguides decrease in a direction from the input end to the output end. Intervals between the ports of the input end are smaller than intervals between the ports of the output end. The optical waveguide block has a structure in which at least one layer having at least one waveguide is laminated.
-
公开(公告)号：US20190182173A1
公开(公告)日：2019-06-13
申请号：US16122200
申请日：2018-09-05
Inventor： Kyeong Eun HAN , Dae Ub KIM , Chan Sung PARK , Jong Tae SONG , Kwang Joon KIM , Joon Ki LEE
IPC: H04L12/863 , H04L12/841 , H04L12/935
Abstract: A parallel scheduling apparatus includes an information managing unit generating a first request information for scheduling, a first scheduling unit performing first scheduling and then generating first matching information on the basis of the first request information, and a second scheduling unit performing second scheduling on the basis of the first request information and the first matching information. The parallel scheduling has an advantage of improving the scheduling performance and lowering the implementation complexity, ensuring low delay and transmission fairness among VOQs at low input traffic, being applied to all scheduling algorithms that perform existing multi-iterations, and providing efficient scheduling in a packet switch having a long RTT time or having a very short time slot or cell size, such as an optical switch.
-
公开(公告)号：US20190115720A1
公开(公告)日：2019-04-18
申请号：US16028723
申请日：2018-07-06
Inventor： Sanghwa YOO , Kwangjoon KIM , Joon Ki LEE
IPC: H01S5/068 , H01S5/125 , H01S5/06 , H04B10/50 , H04B10/572
Abstract: An optical signal transmission apparatus including a temperature-independent wavelength tunable laser includes a distributed Bragg reflector (DBR) laser including a DBR mirror region configured to convert a wavelength of an output optical signal based on a first supply current, and an optical gain region configured to control a gain of the output optical signal based on a second supply current, a semiconductor optical amplifier (SOA) configured to amplify an optical signal output from the DBR laser based on a third supply current, and a processor configured to supply a compensation current to the optical gain region based on a wavelength conversion request, to suppress a wavelength overshoot due to a carrier effect caused by the first supply current provided to the DBR mirror region.
-
14.发明申请公开(公告)号：US20190020438A1
公开(公告)日：2019-01-17
申请号：US16033330
申请日：2018-07-12
Inventor： Sae Kyoung KANG , Joon Ki LEE , Joon Young HUH
IPC: H04J14/02 , H04B10/077 , H04Q11/00
CPC classification number: H04J14/0283 , H04B10/0779 , H04B10/0799 , H04B10/506 , H04J14/022 , H04Q11/0062 , H04Q2011/0083 , H04Q2011/0088 , H04Q2011/0092
Abstract: A transmitter for transmitting an optical signal in an optical communication system includes a plurality of light sources configured to output optical signals; a plurality of first optical couplers configured to multiplex the optical signals, which are output from the plurality of light sources, to generate a first optical signal, and output the first optical signal through a first output port and a second output port of each of the plurality of first optical couplers; a first monitoring unit configured to monitor the first optical signal which is output through the second output port of each of the plurality of first optical couplers; and a controller configured to control an optical output of each of the plurality of light sources on the basis of a result of the monitoring.
-
公开(公告)号：US20170329087A1
公开(公告)日：2017-11-16
申请号：US15484359
申请日：2017-04-11
Inventor： Joon Young HUH , Sae-Kyoung KANG , Joon Ki LEE , Jie Hyun LEE
CPC classification number: G02B6/29367
Abstract: An optical demultiplexing device includes a demultiplexer configured to demultiplex an input light into lights of different wavelength bands, and output the lights of different wavelength bands in a first direction and a second direction, and a detector configured to detect the light output in the first direction and the light output in the second direction.
-
Patent Agency Ranking
公开(公告)号：US20160233961A1
公开(公告)日：2016-08-11
申请号：US15016952
申请日：2016-02-05
Inventor： Joon Young HUH , Jong Hyun LEE , Joon Ki LEE , Sae Kyoung KANG , Jyung Chan LEE
CPC classification number: H04B10/40 , H04B10/5161 , H04B10/541 , H04B10/60 , H04B10/69 , H04L7/0075 , H04L7/0331 , H04L7/0334 , H04L27/0008 , H04L27/0012 , H04L27/02 , H04L27/2067
Abstract: An optical transceiver of a flexible modulation format. The optical transceiver may include an optical transmitter to convert an electrical signal to an optical signal and transmit the optical signal, an optical receiver to receive and convert the optical signal to an electrical signal, s and a controller to set modulation formats of the optical transmitter and the optical receivers according to modulation format information.
Abstract translation: 一种灵活调制格式的光收发器。 光收发器可以包括光发射机，用于将电信号转换为光信号并传输光信号;光接收器，用于接收光信号并将其转换为电信号和控制器，以设置光发射机的调制格式 和光接收机根据调制格式信息。
-
17.发明公开公开(公告)号：US20240146330A1
公开(公告)日：2024-05-02
申请号：US18113756
申请日：2023-02-24
Inventor： In Ki HWANG , Hun Sik KANG , Joon Ki LEE
IPC: H03M13/11
CPC classification number: H03M13/1111
Abstract: Provided are a method of low-complexity decoding based on soft decision and a computing device for performing the method. The method of low-complexity decoding based on soft decision, performed by a computing device, includes receiving a vector, in which a codeword is modulated, through a channel, determining a decoding result by sequentially applying the received vector to one or more decoding algorithms, and decoding the codeword based on an analysis on the decoding result of a detector corresponding to each of the one or more decoding algorithms.
-
公开(公告)号：US20240121002A1
公开(公告)日：2024-04-11
申请号：US18389942
申请日：2023-12-20
Inventor： Seung-Hyun CHO , Joon Ki LEE
IPC: H04B10/2575 , H04B10/077
CPC classification number: H04B10/2575 , H04B10/077 , H04B10/07
Abstract: A test device and method for testing a distributed feedback laser diode (DFB-LD) device for an optical transceiver of a radio over fiber (RoF) system examines the DFB-LD device based on an absolute limiting rating, an operating case environment, and a functional specification, in which the absolute limiting rating is a rating at which there is no fatal damage to the DFB-LD device during a short period of time when each limiting parameter is isolated and all other parameters are in a normal performance parameter, the operating case environment includes an operating temperature, and the functional specification includes parameters to be tested according to an operating condition for the functional specification.
-
公开(公告)号：US20230068004A1
公开(公告)日：2023-03-02
申请号：US17545063
申请日：2021-12-08
Inventor： Sanghwa YOO , Sooyeon KIM , Heuk PARK , Jyung Chan LEE , Joon Ki LEE
Abstract: A silicon photonics-based optical modulator is disclosed. The optical modulator includes first radio frequency (RF) metal electrodes that operate as a ground, phase shifters disposed between the first RF metal electrodes for optically modulating an optical signal transmitted along an optical waveguide, second RF metal electrodes disposed between the phase shifters for providing an RF electrical signal received from a driving driver located outside of the optical modulator through one end, resistor-inductors (RL) connected to another end of the second RF metal electrodes, an inductive line disposed between the RLs and a power supply for applying a bias voltage to the optical modulator and the driving driver, and a silicon capacitor disposed between the RLs and the power supply for preventing a degradation of an RF response characteristic of the silicon photonics-based optical modulator caused by the inductive line.
-
公开(公告)号：US20220326444A1
公开(公告)日：2022-10-13
申请号：US17587194
申请日：2022-01-28
Inventor： Sae-Kyoung KANG , Joon Young HUH , Joon Ki LEE
IPC: G02B6/30
Abstract: An optical fiber coupler includes a plurality of optical fibers parallel to each other in a first direction, an optical fiber array block (FAB) configured to maintain a constant center-to-center distance between the plurality of optical fibers, and an optical waveguide block including a plurality of optical waveguides coupled to the plurality of optical fibers, respectively, and configured to transfer optical signals transmitted through the plurality of optical fibers connected to the optical FAB in a second direction in which a photonics chip is placed and which is different from the first direction.
-
-
-
-
-
-
-
-
-
Search Results
47
records
(took 0.023 seconds)
