公开(公告)号：US10297971B2

公开(公告)日：2019-05-21

申请号：US15481529

申请日：2017-04-07

申请人： Lijie Qiao

发明人： Lijie Qiao

IPC分类号： H01S3/08 ,  H01S3/10 ,  H01S3/16 ,  H01S3/067 ,  H01S3/0941

摘要： A multi-stage optical amplifier has an input port for receiving an optical signal and a relatively short erbium doped optical fiber is coupled to the input port. Complex costly pump feedback is not required as a constant non-varying saturation pump is configured to provide non varying output power pump light of a predetermined wavelength suitable for excitation and full saturation of the erbium ions such that a full population inversion occurs. The length of the short erbium doped fiber and rare earth doping concentration of the erbium doped fiber is such that when pumped by said pump provides amplification of the optical signal of less than 15 dB. Locating a gain flattening filter after the short erbium doped optical fiber provides a relatively flat amplified output signal. Multi-stages of similar short erbium doped fibers pumped and saturated by the same pump signal economically provide increased amplification of the signal and filters after each state flatten the gain.

公开(公告)号：US08363311B2

公开(公告)日：2013-01-29

申请号：US12645541

申请日：2009-12-23

申请人： Lijie Qiao

发明人： Lijie Qiao

IPC分类号： H04B10/17 ,  H04B10/12

CPC分类号： H01S3/06758 ,  H01S3/094003 ,  H01S3/094061 ,  H01S3/0941 ,  H01S3/10023 ,  H01S3/1301

摘要： An optical amplifier has a pump and an “anti-pump” for reducing a variation of the amplifier gain with the input optical power. The wavelength of “anti-pump” light is longer than the wavelength of the optical signal being amplified, so that the optical signal serves as a pump for the “anti-pump” light, whereby an optical loss variation with the signal power at the signal wavelength is created, which reduces optical gain variation with the signal power. To compensate for gain loss due to the anti-pump light, two and three stages of amplification can be used.

摘要翻译： 光放大器具有用于减小放大器增益与输入光功率变化的泵和抗泵。 抗泵浦光的波长比被放大的光信号的波长长，使得光信号用作抗泵浦光的泵，由此产生信号波长处的信号功率的光损耗变化 ，这降低了信号功率的光增益变化。 为了补偿由于抗泵浦光引起的增益损失，可以使用两级和三级放大。

公开(公告)号：US20120093516A1

公开(公告)日：2012-04-19

申请号：US13026915

申请日：2011-02-14

申请人： Lijie QIAO ,  Ahmad ATIEH ,  John MILLS

发明人： Lijie QIAO ,  Ahmad ATIEH ,  John MILLS

IPC分类号： H04J14/02 ,  H04B10/12

CPC分类号： H04B10/07951

摘要： A system and method for in-service optical dispersion determination are provided. Optical dispersion is determined by splitting a first optical signal into two components, introducing a time delay between the two components such that corresponding pulses of the two components partially overlap, combining the two components to generate a combined optical signal comprising a first component and a second component, determining power of the combined optical signal while applying a plurality of dispersion compensation values, in order to determine a dispersion compensation value that results in a minimum detected power of the combined optical signal. Polarization Mode Dispersion is determined by adjusting the time delay that is introduced until the power of the combined optical signal is substantially equal for all of the plurality of dispersion compensation values.

摘要翻译： 提供了一种用于在线光学色散测定的系统和方法。 通过将第一光信号分成两个分量来确定光散射，在两个分量之间引入时间延迟，使得两个分量的相应脉冲部分重叠，组合两个分量以产生包括第一分量和第二分量的组合光信号 分量，在施加多个色散补偿值时确定组合光信号的功率，以便确定导致组合光信号的最小检测功率的色散补偿值。 极化模式通过调整引入的时间延迟来确定分散，直到组合的光信号的功率对于所有多个色散补偿值为基本相等。

公开(公告)号：US07405870B2

公开(公告)日：2008-07-29

申请号：US11645161

申请日：2006-12-26

申请人： Lijie Qiao ,  Paul J. Vella

发明人： Lijie Qiao ,  Paul J. Vella

IPC分类号： H01S3/00

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/1305 ,  H01S2301/02

摘要： An optical amplifier system and controller and a method for automatically controlling the usable signal power of an optical amplifier are provided. The method differentiates between the total optical power that includes the amplified spontaneous emission (ASE), and the useful amplified optical signal power at the output of the amplifier. The optical amplifier system comprises an optical amplifier, a first and a second photodetector operable to measure the power of the input and output signals of the optical amplifier and an amplification controller with a control input. The amplification controller is operable to compensate for the ASE power when operating in automatic signal power control mode.

摘要翻译： 提供一种光放大器系统和控制器以及用于自动控制光放大器的可用信号功率的方法。 该方法区分包括放大的自发发射（ASE）的总光功率和放大器输出端的有用放大光信号功率。 光放大器系统包括光放大器，第一和第二光电检测器，其可操作以测量光放大器的输入和输出信号的功率以及具有控制输入的放大控制器。 放大控制器可操作以在以自动信号功率控制模式操作时补偿ASE功率。

公开(公告)号：US10297970B2

公开(公告)日：2019-05-21

申请号：US15481524

申请日：2017-04-07

申请人： Lijie Qiao

发明人： Lijie Qiao

IPC分类号： H01S3/08 ,  H01S3/10 ,  H01S3/16 ,  H01S3/067 ,  H01S3/0941

摘要： A multi-stage optical amplifier has an input port for receiving an optical signal and a relatively short erbium doped optical fiber is coupled to the input port. Complex costly pump feedback is not required as a constant non-varying saturation pump is configured to provide non varying output power pump light of a predetermined wavelength suitable for excitation and full saturation of the erbium ions such that a full population inversion occurs. The length of the short erbium doped fiber and rare earth doping concentration of the erbium doped fiber is such that when pumped by said pump provides amplification of the optical signal of less than 15 dB. Locating a gain flattening filter after the short erbium doped optical fiber provides a relatively flat amplified output signal. Multi-stages of similar short erbium doped fibers pumped and saturated by the same pump signal economically provide increased amplification of the signal and filters after each state flatten the gain.

公开(公告)号：US20180052294A1

公开(公告)日：2018-02-22

申请号：US15494598

申请日：2017-04-24

申请人： Lijie QIAO

发明人： Lijie QIAO

IPC分类号： G02B6/44

CPC分类号： G02B6/4439 ,  G02B6/3668 ,  G02B6/3672 ,  G02B6/3885 ,  G02B6/3893 ,  G02B6/4471

摘要： An optical regroup cable is provided for a fixed optical cross connect. The cable may include holders for supporting the fibers within the cable and to group the fibers into two bundles. The bundles are arranged so that relative positions of two bundle ends at a first end of the cable are different from relative positions of two bundle ends at a second end of the cable.

公开(公告)号：US20170272159A1

公开(公告)日：2017-09-21

申请号：US15453171

申请日：2017-03-08

申请人： Lijie QIAO

发明人： Lijie QIAO

IPC分类号： H04B10/25 ,  H04J14/02

CPC分类号： H04B10/2503 ,  H04B10/2971 ,  H04J14/02

摘要： A bidirectional optical amplifier amplifies optical signals having signal wavelength and signal power input from two directions. The amplifier is arranged so that two counter-propagating signals pass through a first pumped rare earth doped pre-amplifier before passing through other amplifiers downstream. Optical circulators route the two counter propagating signals so that they both pass through in a counter-propagating manner through subsequent pumped rare earth doped amplifiers downstream.

公开(公告)号：US20160064890A1

公开(公告)日：2016-03-03

申请号：US14881198

申请日：2015-10-13

申请人： Lijie QIAO

发明人： Lijie QIAO

IPC分类号： H01S3/10 ,  G02F1/19 ,  G02F1/01 ,  G02F1/09 ,  H01S3/13 ,  H01S3/30

CPC分类号： H01S3/1003 ,  G02F1/0136 ,  G02F1/09 ,  G02F1/19 ,  H01S3/06754 ,  H01S3/1302 ,  H01S3/2391 ,  H01S3/302 ,  H01S2301/04 ,  H04B10/29 ,  H04B10/294

摘要： Devices and methods for lessening a thermal dependence of gain profile of an optical amplifier are disclosed. An optical beam is split in a plurality of sub-beams with a thermally variable power splitting ratio, e.g. one sub-beam may travel a longer optical path length than another. When the sub-beams are recombined, they interfere with each other, causing the throughput to be wavelength dependent. An amplitude of this wavelength dependence is thermally variable due to the thermally variable power splitting ratio. The thermally variable power splitting ratio and the optical path length difference are selected so as to offset a thermal variation of a spectral gain profile of an optical amplifier.

摘要翻译： 公开了用于减轻光放大器的增益曲线的热依赖性的装置和方法。 光束被分成具有热可变功率分配比的多个子光束，例如， 一个子光束可以传播比另一个更长的光路长度。 当子光束重新组合时，它们彼此干扰，导致吞吐量与波长相关。 由于热可变功率分配比，该波长依赖性的振幅是热变量的。 选择热可变功率分配比和光程长度差，以抵消光放大器的光谱增益分布的热变化。

公开(公告)号：US09184554B2

公开(公告)日：2015-11-10

申请号：US14469661

申请日：2014-08-27

申请人： Lijie Qiao

发明人： Lijie Qiao

IPC分类号： H01S3/067 ,  H01S3/13 ,  H01S3/131 ,  H04B10/2507

CPC分类号： H01S3/1317 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/1302 ,  H01S3/2391

摘要： Devices and methods for lessening a thermal dependence of gain profile of an optical amplifier are disclosed. An optical beam is split in two sub-beams with a thermally variable power splitting ratio. One sub-beam travels a longer optical path length than the other. When the two sub-beams are recombined, they interfere with each other, causing the throughput to be wavelength dependent. An amplitude of this wavelength dependence is thermally variable due to the thermally variable power splitting ratio. The thermally variable power splitting ratio and the optical path length difference are selected so as to offset a thermal variation of a spectral gain profile of an optical amplifier.

摘要翻译： 公开了用于减轻光放大器的增益曲线的热依赖性的装置和方法。 光束被分成具有热可变功率分配比的两个子光束。 一个子光束行进比另一个更长的光程长度。 当两个子光束重组时，它们彼此干扰，导致吞吐量与波长相关。 由于热可变功率分配比，该波长依赖性的振幅是热变量的。 选择热可变功率分配比和光程长度差，以抵消光放大器的光谱增益分布的热变化。

公开(公告)号：US20100245986A1

公开(公告)日：2010-09-30

申请号：US12645541

申请日：2009-12-23

申请人： Lijie QIAO

发明人： Lijie QIAO

IPC分类号： H01S3/00 ,  H01S3/09

CPC分类号： H01S3/06758 ,  H01S3/094003 ,  H01S3/094061 ,  H01S3/0941 ,  H01S3/10023 ,  H01S3/1301

摘要： An optical amplifier has a pump and an “anti-pump” for reducing a variation of the amplifier gain with the input optical power. The wavelength of “anti-pump” light is longer than the wavelength of the optical signal being amplified, so that the optical signal serves as a pump for the “anti-pump” light, whereby an optical loss variation with the signal power at the signal wavelength is created, which reduces optical gain variation with the signal power. To compensate for gain loss due to the anti-pump light, two and three stages of amplification can be used.

摘要翻译： 光放大器具有用于减小输入光功率的放大器增益变化的泵和“反泵”。 “反泵”光的波长比被放大的光信号的波长长，使得光信号用作“防泵”光的泵，由此光信号功率在 产生信号波长，这降低了信号功率的光增益变化。 为了补偿由于抗泵浦光引起的增益损失，可以使用两级和三级放大。