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Check the listing for details. 1550 NM 8-Port 22DB Optical Fiber Amplifier EDFA & Wavelength Division Multiplex. Condition: New. Listed at 1028.19 USD. High quality: The pre-pump adopts 980nm as small signal amplification, and a dedicated pulse width constant temperature cooling chip. The system can obtain excellent CNR. - HPEDFA boasts low noise, high gain, large bandwidth, high pumping efficiency and stable performance, widely used in CATV systems.