EXAMINATION OF TEMPERATURE DEPENDENCE OF DOUBLE PASS L BAND ERBIUM DOPED FIBER AMPLIFIER

In this study, temperature dependent gain variation of single pass (sp) and double pass (dp) l band erbium doped fiber amplifiers (l-edfa) has been examined. to do this l-edfa is experimentally investigated by pumping bi-directionally using 980 nm pump lasers and input signals at -20 dbm powers in the temperature range between 0 °c and 60 °c. experimental results show that, the gain of dp l-edfa is higher than that of sp l-edfa gain. however, the results also show that, temperature dependence of dp l-edfa is higher than that of sp edfa. finally, it is observed that dp l-edfa can be operated temperature independent in range between 1568 nm and 1588 nm.