公开(公告)号：US10447010B2

公开(公告)日：2019-10-15

申请号：US15229432

申请日：2016-08-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Byung-Seok Choi

IPC: H01S5/14 ,  H01S5/0687 ,  H01S5/024 ,  H01S3/106 ,  H01S5/06

Abstract: Provided herein are a method and apparatus for controlling the wavelength of an external-cavity wavelength-tunable laser. The reflectivity or transmittance characteristics of a wavelength depend on the phase difference between light reflected by a wavelength-tunable filter and parasitic reflective light. Thus, when the temperature of a module and current applied to a phase control electrode and an external reflector are changed, the characteristics are changed in a periodic manner. The present disclosure relates to a wavelength control algorithm of determining combinations of these parameters to set conditions having optimum chirping characteristics at a desired wavelength.

公开(公告)号：US10649139B2

公开(公告)日：2020-05-12

申请号：US16215416

申请日：2018-12-10

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Duk Jun Kim ,  Young-Ho Ko ,  Dong-Young Kim ,  Jong-Hoi Kim ,  Yongsoon Baek ,  Jung-Ho Song ,  Dong Hyo Lee ,  Byung-Seok Choi ,  Won Seok Han

IPC: G02B6/10 ,  G02B6/122 ,  G02B6/12 ,  G02B6/30

Abstract: An optical waveguide structure includes a substrate and a core structure disposed on the substrate. The substrate includes a first waveguide region, a second waveguide region, and a transition region between the first waveguide region and the second waveguide region. The core structure includes first core segments arranged in a first direction and a second direction crossing the first direction on the transition region. The core structure includes second core segments arranged in the first direction and the second direction on the second waveguide region. The first direction and the second direction are parallel to a top surface of the substrate.

公开(公告)号：US09148227B2

公开(公告)日：2015-09-29

申请号：US14258699

申请日：2014-04-22

Applicant: Electronics and Telecommunications Research Institute

Inventor： Hyun Soo Kim ,  Dong-Hun Lee ,  Mi-Ran Park ,  Byung-Seok Choi ,  Kisoo Kim ,  O-Kyun Kwon

IPC: H04B10/00 ,  H04B10/50 ,  H04B10/516

CPC classification number: H04B10/501 ,  H04B10/2587 ,  H04B10/272 ,  H04B10/516

Abstract: Provided is a reflective colorless optical transmitter receiving a carrier signal, which is a continuous wave, and outputting a modulated optical signal. The reflective colorless optical transmitter includes a semiconductor optical amplifier (SOA) amplifying an input optical signal allowing the input optical signal to have a gain, an optical modulator connected to the SOA and outputting a modulated optical signal, a high reflectivity facet reflecting the modulated optical signal from the optical modulator, and a Bragg reflection mirror connected to the high reflectivity facet, the optical modulator, and the SOA in series, wherein a Bragg resonator is formed by the Bragg reflecting mirror and the high reflectivity facet.

Abstract translation: 提供了一种反射无色光发射机，其接收作为连续波的载波信号，并输出调制的光信号。 反射无色光发射机包括放大输入光信号以允许输入光信号具有增益的半导体光放大器（SOA），连接到SOA并输出调制光信号的光调制器，反映调制光的高反射面 来自光调制器的信号，以及连接到高反射面的布拉格反射镜，光调制器和SOA串联，其中由布拉格反射镜和高反射面形成布拉格谐振器。

公开(公告)号：US09343614B2

公开(公告)日：2016-05-17

申请号：US14616149

申请日：2015-02-06

Applicant: Electronics and Telecommunications Research Institute

Inventor： Su Hwan Oh ,  Ki-Hong Yoon ,  Kisoo Kim ,  O-Kyun Kwon ,  Oh Kee Kwon ,  Byung-Seok Choi ,  Jongbae Kim

IPC: H01L33/00 ,  H01S5/026 ,  H01S5/14 ,  H01L33/20 ,  B82Y20/00 ,  H01S5/022 ,  H01S5/062 ,  H01S5/10 ,  H01S5/223 ,  H01S5/343 ,  H01S5/22 ,  G02B6/30 ,  G02B6/42

CPC classification number: H01L33/005 ,  B82Y20/00 ,  G02B6/305 ,  G02B6/4206 ,  H01L33/0045 ,  H01L33/20 ,  H01L2933/0016 ,  H01L2933/0058 ,  H01S5/02216 ,  H01S5/02284 ,  H01S5/026 ,  H01S5/06226 ,  H01S5/101 ,  H01S5/1014 ,  H01S5/141 ,  H01S5/2213 ,  H01S5/2224 ,  H01S5/2231 ,  H01S5/34306 ,  H01S2301/176

Abstract: Provided are a high-speed superluminescent diode, a method of manufacturing the same, and a wavelength-tunable external cavity laser including the same. The superluminescent diode includes a substrate having an active region and an optical mode size conversion region, waveguides including an ridge waveguide in the active region and a deep ridge waveguide in the optical mode size conversion region connected to the active waveguide, an electrode disposed on the ridge waveguide; planarizing layers disposed on sides of the ridge waveguide and the deep ridge waveguide on the substrate, and a pad electrically connected to the electrode, the pad being disposed on the planarizing layers outside the active waveguide.

公开(公告)号：US11860376B2

公开(公告)日：2024-01-02

申请号：US16415708

申请日：2019-05-17

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Kap-Joong Kim ,  Chun Ju Youn ,  Heasin Ko ,  Byung-Seok Choi ,  Joong-Seon Choe

IPC: G02B27/28 ,  H04K1/08

CPC classification number: G02B27/283 ,  G02B27/286 ,  H04K1/08

Abstract: Provided is a polarization decomposition device. The polarization decomposition device includes a polarization beam splitter configured to split an optical signal into a first polarized light having a first polarization direction and a second polarized light having a second polarization direction different from the first polarized light, a phase shifter configured to delay a phase of the first polarized light, a polarization rotator configured to rotate the second polarized light so that the polarization direction of the second polarized light is changed, and an interference beam splitter configured to allow the first polarized light in which the phase is delayed and the second polarized light in which the polarization direction is rotated to interfere with each other and split them into a third polarized light and a fourth polarized light.