公开(公告)号：US20200220316A1

公开(公告)日：2020-07-09

申请号：US16624656

申请日：2017-12-25

Applicant: Accelink Technologies Co., Ltd.

Inventor： Zhenyu Yu ,  Qinlian Bu ,  Chengpeng Fu ,  Zhijun Ye ,  Fei Liu ,  Fuxing Deng ,  Rui Lei ,  Xiao Cai

IPC: H01S3/094 ,  H01S3/067 ,  H04B10/071

Abstract: An optical amplifier assembly and a detection method capable of dynamically performing optical time-domain reflection detection. The detection method comprises obtaining signal light intensity detection signals from a first and second photodetectors and sending a control signal to an L-band Raman pump when it is determined that the signal light intensity in the second photodetector is lower than a first preset threshold, so that the L-band Raman pump enters into an optical time-domain reflection detection mode; sending a control signal to the L-band Raman pump when the signal light intensity in the second photodetector is greater than or equal the first preset threshold, so that the L-band Raman pump enters into an L-Band Raman optical fiber amplifier operation mode.

公开(公告)号：US20170324210A1

公开(公告)日：2017-11-09

申请号：US15529822

申请日：2014-12-26

Applicant: Accelink Technologies Co., Ltd.

Inventor： Peng Zhang ,  Chengpeng Fu ,  Chunping Yu ,  Jintao Tao ,  Cuihong Zhang

IPC: H01S3/091 ,  H01S3/067 ,  G05B13/02 ,  H01S3/094 ,  G05B6/02

CPC classification number: H01S3/0912 ,  G05B6/02 ,  G05B13/026 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1608 ,  H01S3/302

Abstract: A cascade control system of an optical fiber amplifier includes a target setting parameter module, a primary controller, at least one controlled module and a secondary controller corresponding to the controlled module. The control system adopts two or more cascade control loops so that disturbance entering into the secondary loop can be overcome quickly, thereby the dynamic characteristics of the system may be improved. The primary controller aims to coarse adjustment and overall target control, and the secondary controller aims to fine adjustment and quick convergence of a short-term target, so that the control quality of the cascade control system may be further improved. The cascade control system may define the overall control target directly in the primary loop and avoid impact of aging characteristics of some special parameters on the application.

公开(公告)号：US12294195B2

公开(公告)日：2025-05-06

申请号：US17434502

申请日：2019-12-13

Applicant: Accelink Technologies Co., Ltd

Inventor： Hao Zhang ,  Chengpeng Fu ,  Jintao Tao ,  Lijing Cheng ,  Bingmei Zeng ,  Jingyang Fan

IPC: H01S3/13 ,  H01S3/067 ,  H01S3/30

Abstract: Provided are a method and system for controlling a Raman fiber amplifier. The method comprises: according to a target gain and a tilt, calculating an expected output power of a pump by using a feedforward formula, and obtaining an actual output power of the pump through detection (201); locking the actual output power of the pump to the expected output power through first-stage feedback control (202); according to the target gain and the tilt, calculating an expected ASE power of the pump by using an ASE formula, and obtaining an actual out-of-band ASE power of the pump through detection (203); if the out-of-band ASE is not locked, determining gain compensation and tilt compensation of the pump through second-stage feedback control, and feeding the compensation back to the feedforward formula and the ASE formula for recalculation (204); and repeatedly performing the first-stage feedback control and the second-stage feedback control until the gain and the tilt are locked (205). In the system, a combination of feedforward and multi-closed loop feedback control is used to realize rapid locking of a pump power and locking of the gain and the tilt compensation, which improves the control precision of the gain and the tilt and accelerates a response speed.

公开(公告)号：US11290185B2

公开(公告)日：2022-03-29

申请号：US17264523

申请日：2018-12-25

Applicant: Accelink Technologies Co., Ltd

Inventor： Li Xiao ,  Weiqing Zhang ,  Qinlian Bu ,  Chengpeng Fu ,  Zhi Chen ,  Lijie Qiao

IPC: H04B10/2525

Abstract: Provided by the embodiments of the present invention are a remote optical fiber dispersion compensation device and method, the dispersion compensation device comprising: a distance measurement module, used for measuring a remote distance to a remote access optical fiber; a channel monitoring module, used for monitoring the spectral power of a transmission service wavelength channel; and a remote optical fiber dispersion power equalization module, used for compensating the dispersion of a transmission service signal and adjusting the insertion loss of the wavelength channel according to the measured remote distance of the remote access optical fiber and the monitored spectral power of the transmission service wavelength channel. By employing the embodiments of the present invention, compensation amounts of different channels may be flexibly selected by means of a wavelength selection switch, dispersion may be compensated for remote optical fiber transmission and the insertion loss may be adjusted for different channels by presetting dispersion compensation optical fibers of different lengths, thus achieving compensation and equalization of dispersion and power difference introduced by remote optical fibers of different lengths.

公开(公告)号：US20210288744A1

公开(公告)日：2021-09-16

申请号：US17263283

申请日：2018-12-25

Applicant: Accelink Technologies Co., Ltd

Inventor： Chengpeng Fu ,  Jintao Tao ,  Jun Chen ,  Menghui Le ,  Chunping Yu

IPC: H04J14/02

Abstract: 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.

公开(公告)号：US10439354B2

公开(公告)日：2019-10-08

申请号：US15529822

申请日：2014-12-26

Applicant: Accelink Technologies Co., Ltd.

Inventor： Peng Zhang ,  Chengpeng Fu ,  Chunping Yu ,  Jintao Tao ,  Cuihong Zhang

IPC: H01S3/091 ,  G05B6/02 ,  G05B13/02 ,  H01S3/067 ,  H01S3/094 ,  H01S3/13 ,  H01S3/16 ,  H01S3/30

Abstract: A cascade control system of an optical fiber amplifier includes a target setting parameter module, a primary controller, at least one controlled module and a secondary controller corresponding to the controlled module. The control system adopts two or more cascade control loops so that disturbance entering into the secondary loop can be overcome quickly, thereby the dynamic characteristics of the system may be improved. The primary controller aims to coarse adjustment and overall target control, and the secondary controller aims to fine adjustment and quick convergence of a short-term target, so that the control quality of the cascade control system may be further improved. The cascade control system may define the overall control target directly in the primary loop and avoid impact of aging characteristics of some special parameters on the application.

公开(公告)号：US09800013B2

公开(公告)日：2017-10-24

申请号：US15106553

申请日：2013-12-25

Applicant: Accelink Technologies Co., Ltd. ,  Accelink Electronic Technology Co., Ltd

Inventor： Tao Xiong ,  Chengpeng Fu ,  Menghui Le ,  Jintao Tao ,  Yunyu Jing ,  Qinlian Bu ,  Chunping Yu

IPC: H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H01S3/13 ,  H04B10/291 ,  H01S3/23

CPC classification number: H01S3/302 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/2391 ,  H04B10/2916

Abstract: 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.

公开(公告)号：US20220385024A1

公开(公告)日：2022-12-01

申请号：US17641534

申请日：2019-12-05

Applicant: Accelink Technologies Co., Ltd.

Inventor： Jintao Tao ,  Chengpeng Fu ,  Bingmei Zeng ,  Jingyang Fan ,  Hao Zhang ,  Lijing Cheng ,  Chunping Yu ,  Menghui Le

IPC: H01S3/067 ,  H01S3/13 ,  H01S3/10 ,  H04B10/296 ,  H04B10/291

Abstract: 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.

公开(公告)号：US11296810B2

公开(公告)日：2022-04-05

申请号：US16474131

申请日：2017-12-27

Applicant: GC Photonics Inc. ,  Accelink Technologies Co., Ltd.

Inventor： Alan Solheim ,  Qinlian Bu ,  Weiqing Zhang ,  Chengpeng Fu ,  Lijie Qiao

IPC: H04J14/02 ,  H01S3/067 ,  H01S3/094 ,  H04Q11/00

Abstract: An optical circuit includes: a multicast-and-select (MCS) switch and multiple optical selective devices coupled to output ports of the MCS switch. The selective devices may select a single optical channel by blocking some of wavelengths of light passing therethrough and passing at least one other wavelength. The selective devices may be wave blockers or tunable optical filters. The optical circuit further includes an optical amplifying array, wherein each amplifier has an input port optically coupled to one of the selective devices. At least some of the amplifiers have pump light ports for receiving at least a portion of the pump light from one or more laser pumps or from another of the optical amplifiers, wherein the pumps are capable of providing pump light sufficient to fully saturate all of the rare earth doped optical fibers in the array.

公开(公告)号：US11265098B2

公开(公告)日：2022-03-01

申请号：US17263283

申请日：2018-12-25

Applicant: Accelink Technologies Co., Ltd

Inventor： Chengpeng Fu ,  Jintao Tao ,  Jun Chen ,  Menghui Le ,  Chunping Yu

IPC: H04J14/02 ,  H04B10/079

Abstract: 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.