Patents by Inventor Young-Bok Choi
Young-Bok Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20220373448Abstract: According to an embodiment of the disclosure, a device for measuring a turbidity of a solution containing fine particles comprises a laser module emitting a laser beam of a predetermined wavelength band, a coupler outputting the laser beam along a first laser path and a second laser path divided from each other, a probe outputting the laser beam output along the first laser path to a container containing the solution, a light receiving element receiving, through the first laser path, the laser beam reflected or scattered by the fine particles in the solution and detecting the received laser beam, and a controller calculating the turbidity based on a strength of the laser beam detected by the light receiving element.Type: ApplicationFiled: May 19, 2022Publication date: November 24, 2022Inventor: Young Bok CHOI
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Patent number: 9755735Abstract: An optical end monitoring apparatus in an optical communication network includes an optical transmitting unit, an optical receiving unit, and a decision unit. The optical transmitting unit generates first and second optical signals with different wavelengths and transmits the first and second optical signals to the optical end terminal over an optical cable. The optical receiving unit receives reflection signals corresponding to the respective first and second optical signals. The decision unit determines whether the optical end terminal is connected to the optical cable using a difference between magnitudes of the respective received reflection signals.Type: GrantFiled: June 27, 2016Date of Patent: September 5, 2017Assignee: FIBERPIA CO., LTD.Inventor: Young-bok Choi
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Patent number: 9753236Abstract: An optical transceiver including an optical transmitter and an optical receiver for performing a bi-directional communication over a single optical transmission fiber is provided. The optical transmitter includes a laser diode, a main body in which a receptacle part corresponding to an optical connector is formed, the optical connector to which a first optical fiber is coupled using a first supporting member, a second supporting member for supporting a portion coupled between the receptacle part and the optical connector, a plane-spring part provided in at least one of the main body and the optical connector. The optical connector has been coupled to the receptacle part. The plane-spring part is configured to provide an elasticity in a first direction to prevent an additional coupling toward the main body, the first direction is opposite toward the main body. The first optical fiber is connected to the optical receiver.Type: GrantFiled: November 11, 2016Date of Patent: September 5, 2017Assignee: FIBERPIA CO., LTD.Inventor: Young Bok Choi
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Publication number: 20170222714Abstract: An optical end monitoring apparatus in an optical communication network includes an optical transmitting unit, an optical receiving unit, and a decision unit. The optical transmitting unit generates first and second optical signals with different wavelengths and transmits the first and second optical signals to the optical end terminal over an optical cable. The optical receiving unit receives reflection signals corresponding to the respective first and second optical signals. The decision unit determines whether the optical end terminal is connected to the optical cable using a difference between magnitudes of the respective received reflection signals.Type: ApplicationFiled: June 27, 2016Publication date: August 3, 2017Inventor: Young-bok CHOI
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Patent number: 8770124Abstract: A device for diminishing flow resistance in a moon pool is disclosed. The device includes a guide structure (16) having a lattice shape. The guide structure includes horizontal guide plates (20), guide ramps (22), longitudinal reinforcing beams (24) and a hinge axis (H). The horizontal guide plates are spaced apart from each other along a longitudinal direction of a hull and arranged in rows along a lateral direction of the hull. The guide ramps are arranged in rows along the lateral direction and coupled to the respective horizontal guide plates. Front ends of the guide ramps are inclined upwards towards a bow side of the hull and spaced apart from rear ends of the adjacent fore horizontal guide plates. The longitudinal reinforcing beams support the horizontal guide plates and the guide ramps. The lattice guide structure is rotated around the hinge axis towards a transit position or a working position.Type: GrantFiled: August 5, 2010Date of Patent: July 8, 2014Assignee: Daewoo Shipbuilding & Marine Engineering Co., Ltd.Inventors: In-Hwan Shim, Young-Bok Choi
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Patent number: 8588612Abstract: A optical detection apparatus includes: an optical splitting unit configured to split a seed lightwave and split upward signal light generated by an optical network unit, based on the seed lightwave; a first control unit configured to control polarizations of the split seed lightwaves based on a first electrical signal; a second control unit configured to control phases of the split seed lightwaves based on a second electrical signal; an optical coupling and signal conversion unit configured to couple the seed lightwaves, of which the polarization and phase are controlled, and the split upward signal lights, convert the coupled optical signals into the first and second electrical signals, and transfer the first and second electrical signals to the first and second control units, respectively; and a signal detection unit.Type: GrantFiled: August 13, 2010Date of Patent: November 19, 2013Assignee: KT CorporationInventors: Soo-Jin Park, Young-Bok Choi
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Publication number: 20130255561Abstract: A device for diminishing flow resistance in a moon pool is disclosed. The device includes a guide structure (16) having a lattice shape. The guide structure includes horizontal guide plates (20), guide ramps (22), longitudinal reinforcing beams (24) and a hinge axis (H). The horizontal guide plates are spaced apart from each other along a longitudinal direction of a hull and arranged in rows along a lateral direction of the hull. The guide ramps are arranged in rows along the lateral direction and coupled to the respective horizontal guide plates. Front ends of the guide ramps are inclined upwards towards a bow side of the hull and spaced apart from rear ends of the adjacent fore horizontal guide plates. The longitudinal reinforcing beams support the horizontal guide plates and the guide ramps. The lattice guide structure is rotated around the hinge axis towards a transit position or a working position.Type: ApplicationFiled: August 5, 2010Publication date: October 3, 2013Applicant: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO. LTD.Inventors: In-Hwan Shim, Young-Bok Choi
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Publication number: 20100303462Abstract: A optical detection apparatus includes: an optical splitting unit configured to split a seed lightwave and split upward signal light generated by an optical network unit, based on the seed lightwave; a first control unit configured to control polarizations of the split seed lightwaves based on a first electrical signal; a second control unit configured to control phases of the split seed lightwaves based on a second electrical signal; an optical coupling and signal conversion unit configured to couple the seed lightwaves, of which the polarization and phase are controlled, and the split upward signal lights, convert the coupled optical signals into the first and second electrical signals, and transfer the first and second electrical signals to the first and second control units, respectively; and a signal detection unit.Type: ApplicationFiled: August 13, 2010Publication date: December 2, 2010Inventors: Soo-Jin PARK, Young-Bok Choi
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Publication number: 20030116547Abstract: A plurality of solder layers are disposed on a substrate and an optical component is aligned on each of the solder layer. Laser beams are applied to a corresponding section of the substrate to heat a first solder layer on which a first optical component is positioned. Then, the first solder layer is cooled so that the first optical component is bonded to the substrate. Subsequently, laser beams are applied to a second solder layer to bond a second optical component thereon to the substrate.Type: ApplicationFiled: December 26, 2002Publication date: June 26, 2003Inventors: Young Bok Choi, Soo Jin Park, Ki Tae Jeong, Tae Sang Park
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Patent number: 6344148Abstract: An easy method proposes a passive alignment by using an alignment mark. That is, V-shaped grooves are utilized as alignment marks in place of a metal pattern of the prior art in observing an optical contrast. Also, in order to adjust a height of an optical device, the support made of a metal is formed in the conventional method, whereas in the present invention a height of an optical device is adjusted by etching the silicon substrate and clamped through the use of solder bumps formed in the V-shaped grooves. And also, in this invention, it is possible that V-shaped grooves can be facilely formed on a non-planarized substrate by using a method of burying a mask material during the formation of the V-shaped grooves. By applying the above principle, the present invention proposes a process capable of passive aligning an optical device, a planar lightwave circuit (PLC) and an optical fiber, simultaneously.Type: GrantFiled: November 5, 1999Date of Patent: February 5, 2002Assignee: Korea TelecomInventors: Soo-Jin Park, Ki-Tae Jeong, Tae-Seok Suh, Young-Bok Choi, Sang-Pil Han
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Patent number: 5708746Abstract: A structurally improved rail-type device for mechanically splicing optical fibers while reducing the splicing loss is disclosed. The above splicing device not only has a cladding clamp with a seesaw structure thereby easily splicing the optical fibers, it also separately moves the covers relative to the body to easily perform the tuning operation. Due to coating clamp's protrusions and body's slots engaging with each other, the coating clamp exclusively vertically move relative to the body and prevent the optical fibers from being axially thrust. The splicing device further seperately clamps the coating and cladding parts of the optical fibers, thereby preventing the spliced fibers from breaking due to tensile or torsional force. The sliding motion of the covers relative to the body is achieved by the rails of the covers and rail grooves of the body.Type: GrantFiled: December 12, 1995Date of Patent: January 13, 1998Assignee: Korea Telecommunication AuthorityInventors: Han Ha Kim, Young Tak Lee, Jae Kuk Nam, Byung Chul Lee, Jong Young Ha, Young Bok Choi, Mee Kyung Kim, Jong Sup Kim, Oh Duck Kwon, Kun Ik Jun, Young Kyu Lee