It then analyzes OSNR limitation problem of ultra-long span transmission system and proposes some solutions, including Raman Fiber Amplifier(RFA) and Remote Optically Pumped Amplifier(ROPA).
深入分析了超长站距传输系统的OSNR受限问题，提出并介绍了解决方案，重点包括光纤喇曼放大器和遥泵放大器。
It then analyzes OSNR limitation problem of ultra-long span transmission system and proposes some solutions, including Raman Fiber Amplifier(RFA) and Remote Optically Pumped Amplifier(ROPA).
深入分析了超长站距传输系统的OSNR受限问题，提出并介绍了解决方案，重点包括光纤喇曼放大器和遥泵放大器。
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