Characteristic of L band erbium doped fiber amplifier under forward pumping scheme

An experiment on L band EDFA is demonstrated by using forward single stage pump laser and EDFA structure. It uses an uncooled 980 nm pump laser with maximum optical output power of 250 mW. The L band EDFA used is 20 m in length with WDM 980/1550 nm couplers as pump power and signal combiner before entering into L band EDFA. The gain can achieve the value of 30 dB with gain variation within 1 dB in 30 nm from 1570-1610 nm spans of ITU grid wavelength. The lowest power starts at -20 dBm and can be amplified up to 3 dBm.