caption: the output is a power amplifier
exif: {"Image DocumentName": "One stage Er. Doped fiber amplifier", "Image ImageDescription": "Opt. isolator. ASE. filter. Gain equalization. filter. Er. fiber. 980 nm pump. laser module. 980 nm low noise pump laser module for first stage EDFA. Optical isolator is used to reduce back ASE impact. Optical filter is used for gain equalization. ASE filter (FBG) is used to get off ASE and its accumulation. Total gain of fiber amplifier is from 10 dB to 12 dB. small N.F. (noise figure): ~4 dB. Output power : ~ +11 dBm.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}