公开(公告)号：US07123352B2

公开(公告)日：2006-10-17

申请号：US10938078

申请日：2004-09-10

申请人： Ki Ho Han ,  Wangjoo Lee ,  Je Soo Ko

发明人： Ki Ho Han ,  Wangjoo Lee ,  Je Soo Ko

IPC分类号： G01N21/00

CPC分类号： H04B10/07953 ,  H04B10/532 ,  H04J14/02 ,  H04J14/06

摘要： An apparatus and method for monitoring an optical signal are provided. In the apparatus, a polarization adjusting unit converts the state of polarization of an optical signal. A polarization beam splitter splits the optical signal into a first polarization component and a second polarization component perpendicular to each other. An optical intensity measuring unit measures the optical intensity of the first polarization component. A feedback control unit controls the polarization adjusting unit so that the first and second polarization components are aligned to the two axes of the polarization beam splitter. A scrambler scrambles the optical signal input to the transmission optical fiber. According to the apparatus and method, optical signal-to-noise ratio (OSNR) can be measured accurately.

摘要翻译： 提供了一种用于监视光信号的装置和方法。 在该装置中，偏振调整单元转换光信号的偏振状态。 偏振分束器将光信号分离成彼此垂直的第一偏振分量和第二偏振分量。 光强度测量单元测量第一偏振分量的光强度。 反馈控制单元控制偏振调节单元，使得第一和第二偏振分量与偏振分束器的两个轴对准。 加扰器加扰输入到传输光纤的光信号。 根据该装置和方法，可以精确地测量光信噪比（OSNR）。

公开(公告)号：US20050135722A1

公开(公告)日：2005-06-23

申请号：US10971979

申请日：2004-10-22

申请人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

发明人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

IPC分类号： H04B10/00 ,  G02B6/34 ,  G02B6/26

CPC分类号： G02B6/4215 ,  G02B6/2713 ,  G02B6/278

摘要： An apparatus for compensating a polarization mode dispersion including a polarization adjusting means for adjusting polarization states of an optical beam having a differential group delay based on a polarization adjusting feedback control signal; a polarization beam splitting means for splitting principal states of polarization of the adjusted optical beam into a first polarization and a second polarization; a time delaying means for the first polarization based on a time delay feedback control signal; a polarization adjustment controlling means for controlling the polarization adjusting means based on a polarization adjusting feedback control signal; a time delay controlling means for controlling the time delaying means based on a time delay controlling feedback signal; and an electric combining means for combining a time-compensated first polarization and the second polarization transmitted through the optical tap.

摘要翻译： 一种用于补偿偏振模色散的装置，包括：偏振调节装置，用于基于偏振调节反馈控制信号调整具有差分组延迟的光束的偏振状态; 偏振光束分离装置，用于将经调整的光束的主要偏振光分解为第一偏振和第二偏振; 基于时间延迟反馈控制信号的第一极化的时间延迟装置; 极化调整控制装置，用于基于偏振调节反馈控制信号控制偏振调节装置; 时间延迟控制装置，用于基于时间延迟控制反馈信号控制时间延迟装置; 以及用于组合经时间补偿的第一偏振和通过光学抽头传输的第二偏振的电合成装置。

公开(公告)号：US20050094130A1

公开(公告)日：2005-05-05

申请号：US10938078

申请日：2004-09-10

申请人： Ki Han ,  Wangjoo Lee ,  Je Ko

发明人： Ki Han ,  Wangjoo Lee ,  Je Ko

IPC分类号： H04B10/17 ,  H04B10/00 ,  H04B10/02 ,  H04B10/08 ,  H04B10/135 ,  H04J14/02 ,  H04J14/06 ,  G01N21/00 ,  G02F1/01

CPC分类号： H04B10/07953 ,  H04B10/532 ,  H04J14/02 ,  H04J14/06

摘要： An apparatus and method for monitoring an optical signal are provided. In the apparatus, a polarization adjusting unit converts the state of polarization of an optical signal. A polarization beam splitter splits the optical signal into a first polarization component and a second polarization component perpendicular to each other. An optical intensity measuring unit measures the optical intensity of the first polarization component. A feedback control unit controls the polarization adjusting unit so that the first and second polarization components are aligned to the two axes of the polarization beam splitter. A scrambler scrambles the optical signal input to the transmission optical fiber. According to the apparatus and method, optical signal-to-noise ratio (OSNR) can be measured accurately.

摘要翻译： 提供了一种用于监视光信号的装置和方法。 在该装置中，偏振调整单元转换光信号的偏振状态。 偏振分束器将光信号分离成彼此垂直的第一偏振分量和第二偏振分量。 光强度测量单元测量第一偏振分量的光强度。 反馈控制单元控制偏振调节单元，使得第一和第二偏振分量与偏振分束器的两个轴对准。 加扰器加扰输入到传输光纤的光信号。 根据该装置和方法，可以精确地测量光信噪比（OSNR）。

公开(公告)号：US20080107427A1

公开(公告)日：2008-05-08

申请号：US12004709

申请日：2007-12-21

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

摘要翻译： 本发明涉及无归零（NRZ）调制方法。 通过组合发送端的时钟信号和NRZ数据并且通过控制时钟信号的幅度和相位来优化当时钟信号和NRZ数据组合时能产生的信号失真来执行NRZ光调制。 在接收端，通过对从发送器发送的检测到的光信号进行窄带带通滤波来提取时钟信号，并且使用时钟信号恢复数据。 因此，用于时钟提取的接收机结构更简单，通过清楚地提取时钟信号，数据恢复的错误率较低，并且光信号的传输距离更长。

公开(公告)号：US07024058B2

公开(公告)日：2006-04-04

申请号：US10971979

申请日：2004-10-22

申请人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

发明人： Ki-Ho Han ,  Wangjoo Lee ,  Je-Soo Ko

IPC分类号： G02B6/27 ,  G02B6/26 ,  H04J14/02

CPC分类号： G02B6/4215 ,  G02B6/2713 ,  G02B6/278

摘要： An apparatus for compensating a polarization mode dispersion including a polarization adjusting means for adjusting polarization states of an optical beam having a differential group delay based on a polarization adjusting feedback control signal; a polarization beam splitting means for splitting principal states of polarization of the adjusted optical beam into a first polarization and a second polarization; a time delaying means for the first polarization based on a time delay feedback control signal; a polarization adjustment controlling means for controlling the polarization adjusting means based on a polarization adjusting feedback control signal; a time delay controlling means for controlling the time delaying means based on a time delay controlling feedback signal; and an electric combining means for combining a time-compensated first polarization and the second polarization transmitted through the optical tap.

摘要翻译： 一种用于补偿偏振模色散的装置，包括：偏振调节装置，用于基于偏振调节反馈控制信号调整具有差分组延迟的光束的偏振状态; 偏振光束分离装置，用于将经调整的光束的主要偏振光分解为第一偏振和第二偏振; 基于时间延迟反馈控制信号的第一极化的时间延迟装置; 极化调整控制装置，用于基于偏振调节反馈控制信号控制偏振调节装置; 时间延迟控制装置，用于基于时间延迟控制反馈信号控制时间延迟装置; 以及用于组合经时间补偿的第一偏振和通过光学抽头传输的第二偏振的电合成装置。

公开(公告)号：US20100098429A1

公开(公告)日：2010-04-22

申请号：US12517783

申请日：2007-12-05

申请人： Yong-Il Jun ,  Wangjoo Lee ,  Tae-Joon Park ,  Young-Boo Kim

发明人： Yong-Il Jun ,  Wangjoo Lee ,  Tae-Joon Park ,  Young-Boo Kim

IPC分类号： H04B10/12

CPC分类号： G01J1/0411 ,  G01J1/02 ,  G01J1/0204 ,  G01J1/04 ,  G01J1/46 ,  H01L31/0203 ,  H01L31/02325

摘要： Provided are a multi-aperture optical detector that can address structural problems such as a complex signal wiring in array type optical detectors, and a need for a plurality of low noise amplifiers, signal to noise ratio detectors, etc., and an optical signal detecting circuit including the multi-aperture optical detector. The multi-aperture optical detector includes transmission lines having two output terminals; and a plurality of unit optical detectors which respectively have random polarities through the transmission lines and are connected in parallel, and optical signals from each of the unit optical detectors are added and output through the two output terminals. The multi-aperture optical detector has a high operation band width and can detect optical signals with a high sensitivity by connecting a plurality of unit optical detectors that respectively have a low optical detecting sensitivity and are physically compact and small.

摘要翻译： 提供了一种可以解决诸如阵列式光检测器中的复杂信号布线等结构问题的多孔光学检测器，以及需要多个低噪声放大器，信噪比检测器等，以及光信号检测 电路包括多孔光学检测器。 多孔光学检测器包括具有两个输出端的传输线; 以及分别通过传输线具有并联并联的随机极性的多​​个单元光学检测器，并且来自每个单元光学检测器的光信号通过两个输出端相加并输出。 多孔光学检测器具有高的操作带宽，并且可以通过连接分别具有低光学检测灵敏度并且物理紧凑和小的多个单元光学检测器来检测具有高灵敏度的光信号。

公开(公告)号：US07330664B2

公开(公告)日：2008-02-12

申请号：US10860903

申请日：2004-06-03

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Ho Han ,  Je Soo Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Ho Han ,  Je Soo Ko

IPC分类号： H04B10/04 ,  H04B10/00

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

公开(公告)号：US20060110167A1

公开(公告)日：2006-05-25

申请号：US11284497

申请日：2005-11-21

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  SangKyu Lim ,  Ki-Ho Han ,  Je-Soo Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  SangKyu Lim ,  Ki-Ho Han ,  Je-Soo Ko

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/508 ,  H04L7/0008 ,  H04L7/0075

摘要： Provided are a clock component generating apparatus using an asymmetrical distortion of NRZ (non-return to zero) signal and an optical transmission and reception system employing it. The clock component generation apparatus can make an NRZ optical signal have large clock component by asymmetrically distorting the rising and the falling waveform of the NRZ signal utilized in an optical communication system. This apparatus includes asymmetrical pull-up circuit for producing a pull-up function and pull-down circuit for pull-down function to thereby generate a clock component in the distorted NRZ data signal. The invention may advantageously be applied to an optical transmission and reception system.

摘要翻译： 提供了使用NRZ（不归零）信号的不对称失真的时钟分量生成装置和使用它的光发送和接收系统。 时钟分量生成装置可以通过对在光通信系统中使用的NRZ信号的上升和下降波形进行非对称失真来使得NRZ光信号具有大的时钟分量。 该装置包括用于产生用于下拉功能的上拉功能和下拉电路的非对称上拉电路，从而在失真的NRZ数据信号中产生时钟分量。 本发明可有利地应用于光传输和接收系统。

公开(公告)号：US20050095002A1

公开(公告)日：2005-05-05

申请号：US10860903

申请日：2004-06-03

申请人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

发明人： Wangjoo Lee ,  Hyunwoo Cho ,  Ki Han ,  Je Ko

IPC分类号： H04B10/04 ,  H04B10/155 ,  H04J14/08 ,  H04L27/00

CPC分类号： H04B10/505 ,  H04B10/541

摘要： The present invention relates to none return to zero (NRZ) modulation method. The NRZ optical modulation is performed by combining a clock signal and NRZ data at a sending end and signal distortion capable of being generated when the clock signal and the NRZ data are combined is optimized by controlling the magnitude and phase of the clock signal. At the receiving end, the clock signal is extracted by performing narrow band band-pass filtering of the detected optical signal transmitted from a transmitter and data is recovered using the clock signal. Therefore, a receiver structure for clock extraction is simpler, an error rate of data recovery is lower by clearly extracting the clock signal, and transmission distance of the optical signal is longer.

摘要翻译： 本发明涉及无归零（NRZ）调制方法。 通过组合发送端的时钟信号和NRZ数据并且通过控制时钟信号的幅度和相位来优化当时钟信号和NRZ数据组合时能产生的信号失真来执行NRZ光调制。 在接收端，通过对从发送器发送的检测到的光信号进行窄带带通滤波来提取时钟信号，并且使用时钟信号恢复数据。 因此，用于时钟提取的接收机结构更简单，通过清楚地提取时钟信号，数据恢复的错误率较低，并且光信号的传输距离更长。