What is Super C-band

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G.709 ODU Maintenance Signals

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  ODU maintenance signals  Three ODU maintenance signals are defined as per G.709: ODU-AIS, ODU-OCI and ODU-LCK ODU alarm indication signal (ODU-AIS)   ODUK-AIS-PM is a secondary condition that indicates a more serious condition such as the LOS (OCN/STMN) alarm occurring downstream. The ODUK-AIS-PM condition is reported in the path monitoring area of the optical data unit wrapper overhead. ODUK-AIS-PM is caused by the upstream ODUK-OCI-PM .   ODUk-AIS is specified as all "1"s in the entire ODU signal, excluding the frame alignment overhead (FA OH), OTU overhead (OTU OH)  The ODUk contains one instance of ODU AIS. The ODUCn contains n instances of ODU AIS, numbered 1 to n (ODU AIS #1 to #n). In addition, the ODU-AIS s...
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OPEN ROADM MSA

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The goals of the Open ROADM Multi-Source Agreement are  (1) the disaggregation and opening up of traditionally proprietary ROADM systems   (2) the SDN-enablement of traditionally fixed ROADMs   There are many ways to disaggregate ROADM systems, e.g. hardware disaggregation (e.g. defining a common shelf) or functional disaggregation (less about hardware, more about function). Due to the complexity of common shelves, the Open ROADM MSA chose the functional disaggregation first. We defined three optical functions: pluggable optics, transponder and ROADM (the optical switch part with amplifiers, couplers, WSS, etc.). Common shelves can be introduced at a later point for some functions, like transponders, if they make sense as an extension of the models.   All of the three disaggregated functions (pluggable optics, transponder and ROADM) are controllable through an open standards-based API (written in the data modeling language YANG) that can be accessed through a...
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Coherent DSP (Digital Signal Processor)

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  A coherent DSP (Digital Signal Processor) plays a crucial role in modern optical communication systems, especially those using coherent detection techniques. Coherent detection involves using both the amplitude and phase information of the received optical signal to extract transmitted data. A coherent DSP processes the received optical signal in the digital domain to recover the transmitted data accurately. Here's how a coherent DSP works: Photodetection and Mixing: In coherent optical communication, the received optical signal is mixed with a local oscillator (LO) signal to generate an electrical signal. This process is known as photodetection. The LO signal is typically generated at the receiver and has a stable frequency and phase relationship with the transmitted signal. Analog-to-Digital Conversion (ADC): The electrical signal generated by photodetection is analog in nature. The first step in coherent DSP processing is to convert this analog signal into a digital format u...
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