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1. 发明申请

US20210288744A1 DWDM REMOTE PUMPING SYSTEM CAPABLE OF IMPROVING OSNR 有权
公开(公告)号：US20210288744A1
公开(公告)日：2021-09-16
申请号：US17263283
申请日：2018-12-25
申请人： Accelink Technologies Co., Ltd
发明人： Chengpeng Fu , Jintao Tao , Jun Chen , Menghui Le , Chunping Yu
IPC分类号： H04J14/02
摘要： The present disclosure relates to optical communications, and in particular, to a DWDM remote pumping system for improving an OSNR. The system includes remote pumping gain unit, preamplifier, and gain flattening filter sequentially connected. Remote pumping gain unit and the preamplifier are cascaded one behind the other as a whole amplifier. Gain flattening filter is disposed at the preamplifier's output end. In the system, the remote gain unit and preamplifier which have large impact on the OSNR of the entire system are optimally designed as a whole amplifier. In remote gain unit, gain flattening filter originally disposed between two erbium-doped fiber segments is moved back to preamplifier's output end for significant improvement of gain and noise figures of the remote gain unit while ensuring gain flatness of the entire transmission system, thus effectively improving the entire system's OSNR, improving operation stability and reliability, effectively reducing bit error rate, and facilitating system maintenance.

2. 发明授权

US09800013B2 Raman pump laser control apparatus and control method therefor 有权
公开(公告)号：US09800013B2
公开(公告)日：2017-10-24
申请号：US15106553
申请日：2013-12-25
申请人： Accelink Technologies Co., Ltd. , Accelink Electronic Technology Co., Ltd
发明人： Tao Xiong , Chengpeng Fu , Menghui Le , Jintao Tao , Yunyu Jing , Qinlian Bu , Chunping Yu
IPC分类号： H01S3/30 , H01S3/067 , H01S3/094 , H01S3/13 , H04B10/291 , H01S3/23
CPC分类号： H01S3/302 , H01S3/06754 , H01S3/094003 , H01S3/094096 , H01S3/1301 , H01S3/1305 , H01S3/2391 , H04B10/2916
摘要： A Raman pump laser control apparatus comprises a wavelength division multiplexer, a tap coupler, a photoelectric detector, an analog amplification processing circuit, an analog-to-digital converter, a fast Raman pump control unit, an digital-analog converter, and a Raman pump laser. The fast Raman pump control unit, after having known anticipated output light power of the Raman pump laser, based on a direct relationship between a current anticipated output light power of the Raman pump laser and input digital quantity that is needed by the digital-analog converter, uses a feedforward control mechanism so that actual output light power of the Raman pump laser fastly approximates the anticipated output light power thereof, and then synchronously combines with a feedback control mechanism so that the actual output light power of the Raman pump laser is precisely locked on the anticipated output light power, thereby achieving fast and precise control of the Raman pump laser.

3. 发明授权

US11245242B2 L-band optical fiber amplifier with pumping balance 有权
公开(公告)号：US11245242B2
公开(公告)日：2022-02-08
申请号：US16230305
申请日：2018-12-21
申请人： Accelink Technologies Co., Ltd.
发明人： Chengpeng Fu , Zhenyu Yu , Qing Liu , Menghui Le , Chunping Yu
IPC分类号： H01S3/00 , H01S3/067 , H01S3/094 , H01S3/16
摘要： The present invention relates to the field of optical communication, and particularly to a balanced pumping L-band optical fiber amplifier comprising a first erbium-doped optical fiber, a second erbium-doped optical fiber, an absorbing erbium-doped optical fiber and at least two pumping lasers, the first erbium-doped optical fiber, the second erbium-doped optical fiber and the absorbing erbium-doped optical fiber being sequentially arranged in this order, and the at least two pumping lasers providing pumping light; wherein the first erbium-doped optical fiber and the second erbium-doped optical fiber both are injected with forward pumping light and backward pumping light, and the absorbing erbium-doped fiber is arranged downstream of the second erbium-doped optical fiber to absorb amplified spontaneous emission (ASE) generated in the amplifier. In the present invention, bidirectional pumping 1s applied in the first and last erbium-doped fibers in the optical path, and an erbium-doped optical fiber that has no pumping injection is added to absorb the ASE. Thus, the pumping conversion efficiency is greatly improved, the nonlinear four-wave mixing effect is reduced, and the problem that the L-band optical fiber amplifier has a high noise when utilizing the backward pumping 1s solved. Meanwhile, the noise figure and the manufacturing cost of the amplifier are reduced.

4. 发明授权

US11251871B2 Method and apparatus for determining maximum gain of Raman fiber amplifier 有权
公开(公告)号：US11251871B2
公开(公告)日：2022-02-15
申请号：US16224729
申请日：2018-12-18
申请人： ACCELINK TECHNOLOGIES CO., LTD.
发明人： Chengpeng Fu , Jintao Tao , Menghui Le , Cuihong Zhang , Di Fang , Qinlian Bu , Chunpin Yu , Fei Liu , Peng Zhang
IPC分类号： H04B10/291 , H01S3/067 , H01S3/30 , H04B10/294 , H04B10/071 , H01S3/13
摘要： The present disclosure relates to a technical field of optical communication, and provides a method and an apparatus for determining maximum gain of Raman fiber amplifier. Wherein the method includes obtaining transmission performance parameters of a current optical fiber transmission line; respectively obtaining impact factors A1, A2, A4 according to a distance between a joint and a pump source, a fiber loss coefficient, and a fiber length included in the transmission performance parameters; calculating a joint loss value AttAeff according to a distance between a joint and a pump source, a fiber loss coefficient, and looking up impact factor A3 according to AttAeff; determining an actual maximum gain which may actually be achieved by the Raman fiber amplifier according to A1, A2, A3, A4. The actual maximum gain obtained in the present disclosure is the maximum gain that may be achieved over all input power ranges, and the original signal in system is kept to operate at a fixed gain, such that a gain locking effect is realized, and fluctuation of existing transmission signal power caused by signal change in transmission fiber link is avoided.

5. 发明申请

US20200007238A1 METHOD AND APPARATUS FOR DETERMINING MAXIMUM GAIN OF RAMAN FIBER AMPLIFIER 审中-公开
公开(公告)号：US20200007238A1
公开(公告)日：2020-01-02
申请号：US16224729
申请日：2018-12-18
申请人： ACCELINK TECHNOLOGIES CO., LTD.
发明人： Chengpeng Fu , Jintao Tao , Menghui Le , Cuihong Zhang , Di Fang , Qinlian Bu , Chunpin Yu , Fei Liu , Peng Zhang
IPC分类号： H04B10/291 , H04B10/294 , H01S3/30 , H01S3/067 , H01S3/13
摘要： The present disclosure relates to a technical field of optical communication, and provides a method and an apparatus for determining maximum gain of Raman fiber amplifier. Wherein the method includes obtaining transmission performance parameters of a current optical fiber transmission line; respectively obtaining impact factors A1, A2, A4 according to a distance between a joint and a pump source, a fiber loss coefficient, and a fiber length included in the transmission performance parameters; calculating a joint loss value AttAeff according to a distance between a joint and a pump source, a fiber loss coefficient, and looking up impact factor A3 according to AttAeff; determining an actual maximum gain which may actually be achieved by the Raman fiber amplifier according to A1, A2, A3, A4. The actual maximum gain obtained in the present disclosure is the maximum gain that may be achieved over all input power ranges, and the original signal in system is kept to operate at a fixed gain, such that a gain locking effect is realized, and fluctuation of existing transmission signal power caused by signal change in transmission fiber link is avoided.

6. 发明申请

US20170025814A1 Raman Pump Laser Control Apparatus And Control Method Therefor 有权
标题翻译：拉曼泵激光控制装置及其控制方法
公开(公告)号：US20170025814A1
公开(公告)日：2017-01-26
申请号：US15106553
申请日：2013-12-25
申请人： ACCELINK TECHNOLOGIES CO., LTD , ACCELINK ELECTRONIC TECHNOLOGY CO., LTD
发明人： Tao Xiong , Chengpeng Fu , Menghui Le , Jintao Tao , Yunyu Jing , Qinlian Bu , Chunping Yu
IPC分类号： H01S3/30 , H01S3/094 , H01S3/067 , H01S3/23 , H01S3/13
CPC分类号： H01S3/302 , H01S3/06754 , H01S3/094003 , H01S3/094096 , H01S3/1301 , H01S3/1305 , H01S3/2391 , H04B10/2916
摘要： A Raman pump laser control apparatus comprises a wavelength division multiplexer, a tap coupler, a photoelectric detector, an analogue amplification processing circuit, an analogue-to-digital converter, a fast Raman pump control unit, an digital-analog converter, and a Raman pump laser. The fast Raman pump control unit, after having known anticipated output light power of the Raman pump laser, based on a direct relationship between a current anticipated output light power of the Raman pump laser and input digital quantity that is needed by the digital-analog converter, uses a feedforward control mechanism so that actual output light power of the Raman pump laser fastly approximates the anticipated output light power thereof, and then synchronously combines with a feedback control mechanism so that the actual output light power of the Raman pump laser is precisely locked on the anticipated output light power, thereby achieving fast and precise control of the Raman pump laser.
摘要翻译：拉曼泵激光控制装置包括波分多路复用器，抽头耦合器，光电检测器，模拟放大处理电路，模数转换器，快速拉曼泵控制单元，数模转换器和拉曼泵激光器。基于拉曼泵浦激光器的当前预期输出光功率与数模转换器所需的输入数字量之间的直接关系，在已知拉曼泵浦激光器的预期输出光功率之后，快速拉曼泵控制单元使用前馈控制机构，使得拉曼泵激光器的实际输出光功率快速近似其预期输出光功率，然后与反馈控制机构同步组合，使得拉曼泵浦激光器的实际输出光功率被精确锁定在预期的输出光功率上，从而实现对拉曼泵浦激光器的快速和精确的控制。

7. 发明申请

US20150214913A1 HYBRID FIBER AMPLIFIER AND METHOD FOR ADJUSTING GAIN AND GAIN SLOPE THEREOF 有权
标题翻译：混合纤维放大器和调整增益和增益斜率的方法
公开(公告)号：US20150214913A1
公开(公告)日：2015-07-30
申请号：US14426047
申请日：2012-09-27
申请人： Accelink Technologies Co., Ltd.
发明人： Chengpeng Fu , Cuihong Zhang , Tao Xiong , Menghui Le , Jintao Tao , Zhenyu Yu , Yunyu Jing , Qinlian Bu , Chunping Yu
IPC分类号： H03G3/30 , H03F3/08
CPC分类号： H03G3/3084 , H01S3/06754 , H01S3/094096 , H01S3/2375 , H01S3/302 , H01S2301/04 , H03F3/08 , H03F3/087 , H04B10/2916 , H04B10/294
摘要： A hybrid fiber amplifier and method of adjusting gain and gain slope of thereof. The hybrid fiber amplifier comprises: RFA and EDFA that does not comprise variable optical attenuator. The RFA comprises pump signal combiner, pump laser group, out-of-band narrow-band filter, and photodetector. The EDFA comprises input coupler, erbium-doped fiber, output coupler, input photodetector, and output photodetector that are connected in sequence. The hybrid fiber amplifier also comprises control module that coordinates and controls EDFA and/or RFA to adjust gain and/or the gain slope based on desired amplification requirements. The EDFA and/or RFA can be coordinated and controlled by using the control module to achieve desired amplification effect. In addition, the EDFA does not comprise the variable optical attenuator, which avoids problems caused by the variable optical attenuator. The hybrid fiber amplifier and method of adjusting gain and gain slope thereof are applicable to technical field of optical communications.
摘要翻译：一种混合光纤放大器及其增益和增益斜率的调整方法。混合光纤放大器包括：RFA和EDFA，其不包括可变光衰减器。 RFA包括泵浦信号组合器，泵浦激光器组，带外窄带滤波器和光电检测器。 EDFA包括依次连接的输入耦合器，掺铒光纤，输出耦合器，输入光电检测器和输出光电检测器。混合光纤放大器还包括控制模块，其基于期望的放大要求来协调和控制EDFA和/或RFA来调节增益和/或增益斜率。可以通过使用控制模块来协调和控制EDFA和/或RFA以实现期望的放大效应。此外，EDFA不包括可变光衰减器，其可以避免由可变光衰减器引起的问题。混合光纤放大器及其增益和增益斜率的调整方法适用于光通信技术领域。

8. 发明申请

US20220385024A1 Control Method And Optical Fiber Amplifier 有权
公开(公告)号：US20220385024A1
公开(公告)日：2022-12-01
申请号：US17641534
申请日：2019-12-05
申请人： Accelink Technologies Co., Ltd.
发明人： Jintao Tao , Chengpeng Fu , Bingmei Zeng , Jingyang Fan , Hao Zhang , Lijing Cheng , Chunping Yu , Menghui Le
IPC分类号： H01S3/067 , H01S3/13 , H01S3/10 , H04B10/296 , H04B10/291
摘要： Disclosed are a control method and an optical fiber amplifier. The optical fiber amplifier is configured to execute the control method. The method comprises: initially correcting a target gain on the basis of a first compensation gain to obtain an initially corrected target gain; when the actual power of the pump laser reaches target power determined on the basis of the initially corrected target gain obtaining, on the basis of a first signal optical power and a second signal optical power, a second compensation gain and a first compensation slope through calculation; correcting the initially corrected target gain again according to the second compensation gain to obtain a corrected target gain; and correcting a target slope according to the first compensation slope to obtain a corrected target slope. This solution can provide high precision control for the gain and the slope of the optical fiber amplifier.

9. 发明授权

US11265098B2 DWDM remote pumping system capable of improving OSNR 有权
公开(公告)号：US11265098B2
公开(公告)日：2022-03-01
申请号：US17263283
申请日：2018-12-25
申请人： Accelink Technologies Co., Ltd
发明人： Chengpeng Fu , Jintao Tao , Jun Chen , Menghui Le , Chunping Yu
IPC分类号： H04J14/02 , H04B10/079
摘要： The present disclosure relates to optical communications, and in particular, to a DWDM remote pumping system for improving an OSNR. The system includes remote pumping gain unit, preamplifier, and gain flattening filter sequentially connected. Remote pumping gain unit and preamplifier are cascaded one behind the other as a whole amplifier. Gain flattening filter is disposed at the preamplifier's output end. In the system, remote gain unit and preamplifier which have large impact on the OSNR of the entire system are optimally designed as a whole amplifier. In remote gain unit, gain flattening filter originally disposed between two erbium-doped fiber segments is moved back to preamplifier's output end for significant improvement of gain and noise figures of the remote gain unit while ensuring gain flatness of the entire transmission system, thus effectively improving the entire system's OSNR, improving operation stability and reliability, effectively reducing bit error rate, and facilitating system maintenance.

10. 发明授权

US09722559B2 Hybrid fiber amplifier and method for adjusting gain and gain slope thereof 有权
公开(公告)号：US09722559B2
公开(公告)日：2017-08-01
申请号：US14426047
申请日：2012-09-27
申请人： Accelink Technologies Co., Ltd.
发明人： Chengpeng Fu , Cuihong Zhang , Tao Xiong , Menghui Le , Jintao Tao , Zhenyu Yu , Yunyu Jing , Qinlian Bu , Chunping Yu
IPC分类号： H01S3/067 , H01S3/30 , H03G3/30 , H04B10/29 , H04B10/294 , H04B10/291 , H03F3/08 , H01S3/094 , H01S3/23
CPC分类号： H03G3/3084 , H01S3/06754 , H01S3/094096 , H01S3/2375 , H01S3/302 , H01S2301/04 , H03F3/08 , H03F3/087 , H04B10/2916 , H04B10/294
摘要： A hybrid fiber amplifier and method of adjusting gain and gain slope of thereof. The hybrid fiber amplifier comprises: RFA and EDFA that does not comprise variable optical attenuator. The RFA comprises pump signal combiner, pump laser group, out-of-band narrow-band filter, and photodetector. The EDFA comprises input coupler, erbium-doped fiber, output coupler, input photodetector, and output photodetector that are connected in sequence. The hybrid fiber amplifier also comprises control module that coordinates and controls EDFA and/or RFA to adjust gain and/or the gain slope based on desired amplification requirements. The EDFA and/or RFA can be coordinated and controlled by using the control module to achieve desired amplification effect. In addition, the EDFA does not comprise the variable optical attenuator, which avoids problems caused by the variable optical attenuator. The hybrid fiber amplifier and method of adjusting gain and gain slope thereof are applicable to technical field of optical communications.

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