... 32 ports of PON+1 port CATV input EDFA, 32 ports of coupled 1550nm /1490nm ... non-radiative, and form the population inversion distribution between this energy level and low-energy-level ... automatically turn off laser power, red light goes on to warn, digital panel prompts cause of troubles., ... you! Hangzhou Fullwell Optoelectronic Equipment Co., LtdAdd:Floor 4, Building 2, No. 17 Jiuhe Road,Hangzhou ...