公开(公告)号：US06928098B2

公开(公告)日：2005-08-09

申请号：US10632587

申请日：2003-07-31

Applicant: Dong-Churl Kim ,  Young-Ahn Leem ,  Dae-Su Yee ,  Kyung-Hyun Pakr ,  Sung-Bock Kim ,  Yong-Soon Baek ,  Eun-Deok Sim

Inventor： Dong-Churl Kim ,  Young-Ahn Leem ,  Dae-Su Yee ,  Kyung-Hyun Pakr ,  Sung-Bock Kim ,  Yong-Soon Baek ,  Eun-Deok Sim

IPC: H01S5/12 ,  H01S5/0625 ,  H01S5/065 ,  H01S5/00 ,  H01S3/08

CPC classification number: H01S5/06258 ,  H01S5/0657

Abstract: Disclosed is a high frequency optical pulse source generating stable optical pulses over a wide current range in an optical transmission system to enhance stability and reliability, the high frequency optical pulse source implementing, in one chip, a multi-section distributed feedback (DFB) laser diode with a phase control section arranged between two DFB laser diodes. By controlling the current applied to the electrode of the phase control section while applying currents to the first and second DFB sections, the present invention causes self-mode locking between the compound-cavity modes having similar threshold currents, thereby generating stable tens GHz-level optical pulses. Hence, the present invention generates optical pulses uniformly over a wide current range, thereby enhancing the stability and reliability of the element.

Abstract translation: 公开了一种在光传输系统中在宽电流范围内产生稳定的光脉冲以提高稳定性和可靠性的高频光脉冲源，高频光脉冲源在一个芯片中实现了多段分布反馈（DFB）激光器 二极管，相位控制部分布置在两个DFB激光二极管之间。 通过控制施加到相位控制部分的电极的电流，同时向第一和第二DFB部分施加电流，本发明引起具有类似阈值电流的化合物腔模式之间的自锁定，从而产生稳定的数十GHz级 光脉冲。 因此，本发明在宽电流范围内均匀地产生光脉冲，从而提高元件的稳定性和可靠性。

公开(公告)号：US20110149368A1

公开(公告)日：2011-06-23

申请号：US12788244

申请日：2010-05-26

Applicant: Namje KIM ,  Kyung Hyun Park ,  Young Ahn Leem ,  Sang-Pil Han ,  Chul-Wook Lee ,  Eundeok Sim ,  Jaeheon Shin

Inventor： Namje KIM ,  Kyung Hyun Park ,  Young Ahn Leem ,  Sang-Pil Han ,  Chul-Wook Lee ,  Eundeok Sim ,  Jaeheon Shin

IPC: G02F1/015 ,  H01S5/50

CPC classification number: G02F1/3534 ,  G02F2203/13 ,  G02F2203/70 ,  H01S5/0092 ,  H01S5/02248 ,  H01S5/06216 ,  H01S5/50

Abstract: Provided are a photomixer module and a method of generating a terahertz wave. The photomixer module includes a semiconductor optical amplifier amplifying incident laser light and a photomixer that is excited by the amplified laser light to generate a continuous terahertz wave. The photomixer is formed as a single module together with the semiconductor optical amplifier.

Abstract translation: 提供了一种光混合器模块和一种产生太赫兹波的方法。 光混合器模块包括放大入射激光的半导体光放大器和由放大的激光激发以产生连续的太赫兹波的光混合器。 该混合器与半导体光放大器一起形成为单个模块。

公开(公告)号：US07924492B2

公开(公告)日：2011-04-12

申请号：US12374261

申请日：2007-04-24

Applicant: Hyun-Soo Kim ,  Jeong-Woo Park ,  Bongki Mheen ,  Young-Ahn Leem ,  Gyungock Kim

Inventor： Hyun-Soo Kim ,  Jeong-Woo Park ,  Bongki Mheen ,  Young-Ahn Leem ,  Gyungock Kim

IPC: G02F1/07

CPC classification number: G02F1/025 ,  G02F2203/50 ,  G11C13/04

Abstract: Provided is an optical device having an edge effect with improved phase shift and propagation loss of light without decreasing the dynamic characteristics of the optical device. The optical device includes a first semiconductor layer which is doped with a first type of conductive impurities, and has a recessed groove in an upper portion thereof; a gate insulating layer covering the groove and a portion of the first semiconductor layer; and a second semiconductor layer which covers an upper surface of the gate insulating layer and is doped with a second type of conductive impurities opposite to the first type of conductive impurities.

Abstract translation: 提供一种具有边缘效应的光学器件，具有改善的相移和光的传播损耗，而不会降低光学器件的动态特性。 光学器件包括掺杂有第一类导电杂质的第一半导体层，并且在其上部具有凹槽; 覆盖所述沟槽和所述第一半导体层的一部分的栅极绝缘层; 以及覆盖所述栅极绝缘层的上表面并且掺杂有与所述第一类型的导电杂质相反的第二类导电杂质的第二半导体层。

公开(公告)号：US07813388B2

公开(公告)日：2010-10-12

申请号：US11932937

申请日：2007-10-31

Applicant: Kyung Hyun Park ,  Hyun Sung Ko ,  Young Ahn Leem ,  Min Yong Jeon ,  Eun Deok Sim ,  Sung Bock Kim

Inventor： Kyung Hyun Park ,  Hyun Sung Ko ,  Young Ahn Leem ,  Min Yong Jeon ,  Eun Deok Sim ,  Sung Bock Kim

IPC: H01S3/098

CPC classification number: H01S5/0625 ,  H01S5/0658

Abstract: Provided is a self-pulsating laser diode including: a distributed feedback (DFB) section serving as a reflector; a gain section connected to the DFB section and having an as-cleaved facet at one end; a phase control section interposed between the DFB section and the gain section; and an external radio frequency (RF) input portion applying an external RF signal to at least one of the DFB section and the gain section.

Abstract translation: 提供了一种自脉动激光二极管，包括：用作反射器的分布反馈（DFB）部分; 连接到DFB部分并且在一端具有劈裂小面的增益部分; 相位控制部，其插入在所述DFB部和所述增益部之间; 以及外部射频（RF）输入部分，将外部RF信号施加到DFB部分和增益部分中的至少一个。

公开(公告)号：US20100142579A1

公开(公告)日：2010-06-10

申请号：US12499069

申请日：2009-07-07

Applicant: Young Ahn LEEM ,  Jung-Ho SONG ,  Kisoo KIM ,  Gyungock KIM

Inventor： Young Ahn LEEM ,  Jung-Ho SONG ,  Kisoo KIM ,  Gyungock KIM

IPC: H01S3/08 ,  H01S5/00

CPC classification number: H01S5/026 ,  H01S5/021 ,  H01S5/0215 ,  H01S5/0655 ,  H01S5/1014 ,  H01S5/1025 ,  H01S5/1032 ,  H01S5/1064 ,  H01S5/125

Abstract: Provided is a resonator of a hybrid laser diode. The resonator includes: a substrate including a semiconductor layer where a hybrid waveguide, a multi-mode waveguide, and a single mode waveguide are connected in series; a compound semiconductor waveguide, provided on the hybrid waveguide of the semiconductor layer, having a tapered coupling structure at one end of the compound semiconductor waveguide, the tapered coupling structure overlapping the multi-mode waveguide partially; and a reflection part provided on one end of the single mode waveguide. The multi-mode waveguide has a narrower width than the hybrid waveguide and the single mode waveguide has a narrower width than the multi-mode waveguide.

Abstract translation: 提供了一种混合激光二极管的谐振器。 谐振器包括：包括混合波导，多模波导和单模波导串联连接的半导体层的基板; 复合半导体波导，设置在半导体层的混合波导上，在化合物半导体波导的一端具有锥形耦合结构，锥形耦合结构部分地与多模波导重叠; 以及设置在单模波导的一端的反射部。 多模波导具有比混合波导窄的宽度，并且单模波导具有比多模波导窄的宽度。

公开(公告)号：US07583868B2

公开(公告)日：2009-09-01

申请号：US11295414

申请日：2005-12-06

Applicant: Dae Su Yee ,  Young Ahn Leem ,  Dong Churl Kim ,  Kyung Hyun Park ,  Sung Bock Kim

Inventor： Dae Su Yee ,  Young Ahn Leem ,  Dong Churl Kim ,  Kyung Hyun Park ,  Sung Bock Kim

IPC: G02B6/12 ,  G02B6/26 ,  G02F1/01 ,  G02F1/035 ,  G02F1/295

CPC classification number: H04B10/299 ,  G02B6/12004

Abstract: A full 3R (re-timing, re-shaping, re-amplifying) recovery system is provided. In the full 3R recovery system, a self-pulsating laser diode (SP-LD) and an electroabsorption modulator (EAM) are integrated and disposed on a semiconductor substrate.

Abstract translation: 提供了一个完整的3R（重新定时，重新整形，再放大）恢复系统。 在完整的3R恢复系统中，自脉冲激光二极管（SP-LD）和电吸收调制器（EAM）被集成并设置在半导体衬底上。

公开(公告)号：US07356263B2

公开(公告)日：2008-04-08

申请号：US11190755

申请日：2005-07-27

Applicant: Dong Churl Kim ,  Dae Su Yee ,  Young Ahn Leem ,  Eun Deok Sim ,  Kyung Hyun Park

Inventor： Dong Churl Kim ,  Dae Su Yee ,  Young Ahn Leem ,  Eun Deok Sim ,  Kyung Hyun Park

IPC: H04B10/02

CPC classification number: H04B10/516 ,  H04B2210/517

Abstract: Provided is a signal processor for converting a signal that converts a return to zero (RZ) signal into a non-return to zero (NRZ) signal, in which two 2R (re-amplifying, re-shaping) regenerators are connected in parallel between an input waveguide and an output waveguide with different lengths from each other. The 2R regenerator includes: two semiconductor optical amplifiers having different lengths from each other; and phase control means connected to a short semiconductor optical amplifier. The RZ signal input by a length difference of the waveguide is delayed by a time difference of a half of one bit so that the 2R regenerated NRZ signal can be obtained.

Abstract translation: 提供了一种信号处理器，用于转换将归零（RZ）信号转换为不归零（NRZ）信号的信号，其中两个2R（再放大，重整）再生器并联连接在 具有彼此不同长度的输入波导和输出波导。 2R再生器包括：具有彼此不同长度的两个半导体光放大器; 以及连接到短半导体光放大器的相位控制装置。 通过波导的长度差输入的RZ信号被延迟了一位的一半的时间差，从而可以获得2R再生的NRZ信号。

公开(公告)号：US20060092502A1

公开(公告)日：2006-05-04

申请号：US11288008

申请日：2005-11-28

Applicant: Dong Kim ,  Dae Su Yee ,  Young Ahn Leem ,  Eun Deok Sim ,  Kyung Hyun Park

Inventor： Dong Kim ,  Dae Su Yee ,  Young Ahn Leem ,  Eun Deok Sim ,  Kyung Hyun Park

IPC: H01S3/00

CPC classification number: H04B10/299 ,  G02F2001/211 ,  G02F2203/70

Abstract: Provided is a signal regenerator for correcting distortion of an optical signal transmitted via an optical fiber in an optical communication system, which includes semiconductor optical amplifiers having different lengths from each other, an asymmetric Mach-Zehnder interferometer that performs 2R (re-amplifying, re-shaping) regeneration, and a delay interferometer with optical waveguides having different lengths from each other, whereby the fabrication is easy and a high-speed signal regeneration is enable.

Abstract translation: 提供了一种用于校正光通信系统中经由光纤传输的光信号的失真的信号再生器，该光通信系统包括彼此不同长度的半导体光放大器，执行2R（再放大，重新）的非对称马赫 - 曾德干涉仪 成形）再生，以及具有彼此具有不同长度的光波导的延迟干涉仪，由此易于制造并且能够进行高速信号再生。

公开(公告)号：US20060078253A1

公开(公告)日：2006-04-13

申请号：US11284632

申请日：2005-11-22

Applicant: Young Ahn Leem ,  Dae Su Yee ,  Eun Deok Sim ,  Dong Churl Kim ,  Kyung Hyun Park

Inventor： Young Ahn Leem ,  Dae Su Yee ,  Eun Deok Sim ,  Dong Churl Kim ,  Kyung Hyun Park

IPC: G02B6/28

CPC classification number: H04B10/299 ,  H01S5/02248 ,  H01S5/4006

Abstract: The 3R regeneration system for a retiming, reshaping, and reamplifying an optical signal includes: first and second input ports in which a connected optical signal is input; an interferometer including first and second branches formed on a substrate, split at a common input node, combined at a common output node, semiconductor optical amplifiers in each of the first and second branches, the first branch being connected to the first input port, and the common input node being connected to the second input port; a self-pulsating laser diode monolithically integrated with the interferometer between one of the first input port and the first branch, and the second input port and the common input node on the substrate, receiving an optical signal, and outputting the optical signal regenerated by optical injection locking; and an output port connected to the common output node.

公开(公告)号：US09036969B2

公开(公告)日：2015-05-19

申请号：US13618353

申请日：2012-09-14

Applicant: Oh Kee Kwon ,  Chul-Wook Lee ,  Dong-Hun Lee ,  Young Ahn Leem ,  Young-Tak Han ,  Yongsoon Baek ,  Yun C. Chung

Inventor： Oh Kee Kwon ,  Chul-Wook Lee ,  Dong-Hun Lee ,  Young Ahn Leem ,  Young-Tak Han ,  Yongsoon Baek ,  Yun C. Chung

IPC: G02B6/26 ,  C03B37/022 ,  G02B6/122 ,  G02B6/30

CPC classification number: G02B6/1228 ,  G02B6/305

Abstract: Provided are a spot size converter and a method of manufacturing the spot size converter. The method includes stacking a lower clad layer, a core layer, and a first upper clad layer on a substrate, tapering the first upper clad layer and the core layer in a first direction on a side of the substrate, forming a waveguide layer on the first upper clad layer and the lower clad layer, and etching the waveguide layer, the first upper clad layer, the core layer, and the lower clad layer such that the waveguide layer is wider than a tapered portion of the core layer on the side of the substrate and has the same width as that of the core layer on another side of the substrate.

Abstract translation: 提供了点尺寸转换器和制造光斑尺寸转换器的方法。 该方法包括在基板上层叠下包层，芯层和第一上包覆层，使第一上包覆层和芯层在衬底侧沿第一方向逐渐变细，在衬底的一侧形成波导层 第一上包覆层和下包层，并且蚀刻波导层，第一上包层，芯层和下包层，使得波导层比芯层的锥形部分宽 并且具有与基板的另一侧上的芯层的宽度相同的宽度。