Invention Grant
US07826748B2 Systems and methods for adaptive gain control to compensate OSNR penalty caused by side-lobe of MEMS-based reconfigurable optical add-drop multiplexers
有权
用于补偿由基于MEMS的可重构光分插复用器的旁瓣引起的OSNR损耗的自适应增益控制的系统和方法
- Patent Title: Systems and methods for adaptive gain control to compensate OSNR penalty caused by side-lobe of MEMS-based reconfigurable optical add-drop multiplexers
- Patent Title (中): 用于补偿由基于MEMS的可重构光分插复用器的旁瓣引起的OSNR损耗的自适应增益控制的系统和方法
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Application No.: US11726934Application Date: 2007-03-23
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Publication No.: US07826748B2Publication Date: 2010-11-02
- Inventor: Xiaohui Yang , Balakrishnan Sridhar
- Applicant: Xiaohui Yang , Balakrishnan Sridhar
- Applicant Address: US MD Linthicum
- Assignee: Ciena Corporation
- Current Assignee: Ciena Corporation
- Current Assignee Address: US MD Linthicum
- Agency: Clements Bernard PLLC
- Agent Christopher L. Bernard; Lawrence A. Baratta, Jr.
- Main IPC: H04J14/02
- IPC: H04J14/02
Abstract:
The present invention provides systems and methods to adaptively control amplifier target power to maintain signal launching power as per design in networks with wavelength selective switch (WSS)-based reconfigurable optical add-drop multiplexers (ROADMs) using micro-electromechanical system (MEMS). Accordingly, signal OSNR does not collapse faster for WSS-based ROADMs than other similar configured system without WSS-based ROADM. In order to correct amplifier target power, the present invention utilizes system information about side-lobe size and OSNR at each amplifier. Related information, such as ASE level and size of side-lobes at each channel from upstream amplifiers, is passed to the network controller at each amplifier. Meanwhile, with target signal level and local WSS attenuation setting (given side-lobe size vs. WSS attenuation known) of each channel, the amplifier calculates what is total output power should be and adaptively maintains that power.
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