公开(公告)号：US20140308005A1

公开(公告)日：2014-10-16

申请号：US14041860

申请日：2013-09-30

Applicant: Korea Institute of Science and Technology

Inventor： Sang Bae Lee ,  Kwan Il Lee ,  Kyung Shik Lee

IPC: G02B6/34

CPC classification number: G02B6/29334 ,  G02B6/02042

Abstract: An optical element includes a multicore optical fiber, the multicore optical fiber including an inner core and at least one peripheral core arranged around the inner core and having an effective refractive index different from that of the inner core, and an optical fiber grating formed at the multicore optical fiber to cause an optical signal to be coupled between different cores among the inner core and the at least one peripheral core. The optical element allows a signal of a specific wavelength to be dropped added from an optical signal. Since the optical element may be fabricated easily, designed in a small size and mass-produced reproducibly at low costs, the optical element may be advantageously utilized for an optical communication network such as a wavelength division multiplexing network, an ultra-high speed optical communication system, an optical sensor system or the like.

Abstract translation: 光学元件包括多芯光纤，所述多芯光纤包括内芯和围绕所述内芯布置的具有与所述内芯不同的有效折射率的至少一个外围芯，以及形成在所述内芯上的光纤光栅 多芯光纤，以使光信号耦合在内芯和至少一个外围核之间的不同芯之间。 光学元件允许从光信号中添加特定波长的信号。 由于光学元件可以容易地制造，以低成本可重复地小尺寸和大规模生产设计，所以光学元件可以有利地用于光通信网络，例如波分复用网络，超高速光通信 系统，光学传感器系统等。

公开(公告)号：US12292315B2

公开(公告)日：2025-05-06

申请号：US17534454

申请日：2021-11-24

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Gukbeen Ryu ,  Wookjin Jeong ,  Sang Bae Lee ,  Wonsuk Lee ,  In Soo Kim ,  Jongbum Kim ,  Kwan Il Lee

IPC: G01D5/353

Abstract: Embodiments relate to a Brillouin distributed optical fiber sensor including a first light source to output a first light having a modulated intensity at a preset frequency, an optical modulation unit to generate Brillouin probe light and Brillouin pump light using the first light and apply the Brillouin probe light and the Brillouin pump light to one end and the other end of a test optical fiber, respectively, a second light source to apply a second light with a frequency that is different from a frequency of the first light to one end of the test optical fiber in a direction opposite to the Brillouin pump light, and an optical detection unit to detect Brillouin scattered light generated by interaction between the Brillouin pump light and the Brillouin probe light in the test optical fiber.

公开(公告)号：US11105659B2

公开(公告)日：2021-08-31

申请号：US16687692

申请日：2019-11-19

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Kwan Il Lee ,  Gukbeen Ryu ,  Sang Bae Lee ,  In Soo Kim ,  Wonsuk Lee

IPC: G01D5/353 ,  H01S5/00 ,  H01S5/12 ,  G02B27/28

Abstract: Embodiments relate to a dual Brillouin distributed optical fiber sensing system and a sensing method using Brillouin scattering that detects an event area in which an event occurred quickly by simultaneously measuring multiple correlation points located in an optical fiber under test by using a pump signal modulated with a pulsed gating signal and a continuous wave probe signal, and then precisely measures the corresponding event area by using the probe signal modulated with the pulsed gating signal and the pump signal.

公开(公告)号：US09477045B2

公开(公告)日：2016-10-25

申请号：US14041860

申请日：2013-09-30

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Sang Bae Lee ,  Kwan Il Lee ,  Kyung Shik Lee

IPC: G02B6/34 ,  G02B6/293 ,  G02B6/02

CPC classification number: G02B6/29334 ,  G02B6/02042

Abstract: An optical element includes a multicore optical fiber, the multicore optical fiber including an inner core and at least one peripheral core arranged around the inner core and having an effective refractive index different from that of the inner core, and an optical fiber grating formed at the multicore optical fiber to cause an optical signal to be coupled between different cores among the inner core and the at least one peripheral core. The optical element allows a signal of a specific wavelength to be dropped added from an optical signal. Since the optical element may be fabricated easily, designed in a small size and mass-produced reproducibly at low costs, the optical element may be advantageously utilized for an optical communication network such as a wavelength division multiplexing network, an ultra-high speed optical communication system, an optical sensor system or the like.

Abstract translation: 光学元件包括多芯光纤，所述多芯光纤包括内芯和围绕所述内芯布置的具有与所述内芯不同的有效折射率的至少一个外围芯，以及形成在所述内芯上的光纤光栅 多芯光纤，以使光信号耦合在内芯和至少一个外围核之间的不同芯之间。 光学元件允许从光信号中添加特定波长的信号。 由于光学元件可以容易地制造，以低成本可重复地小尺寸和大规模生产设计，所以光学元件可以有利地用于光通信网络，例如波分复用网络，超高速光通信 系统，光学传感器系统等。