Global Erbium-ytterbium Codoped Double Cladding Fiber Market By Type (Single Mode, and Multi Mode), By Application (High power Erbium Doped Fiber Amplifiers (EDFAs), Ytterbium/Erbium Doped Fiber Amplifier (YEDFA), Fiber Lasers, Light Radar (LIDAR), and Cable Television (CATV)), By Region, and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2020-2029