Optically controlled phased-array antennas using chriped-fiber gratings by Ng, Jun Jie.

“…As such, a suggested topology is to include an erbium-doped fiber amplifier (EDFA) in the system to amplifier the signal strength. …”
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Hybrid fiber laser for optical communication and industrial applications by Lu, Xiaona.

“…The first objective is to demonstrate a novel single-longitudinal mode (SLM) multiple-dual-wavelength fiber laser (MDWFL) incorporating an erbium-doped fiber amplifier (EDFA) and a semiconductor optical amplifier (SOA) in the actively mode-locked ring cavity. …”
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Investigation on long-reach broadcast/multicast-capable WDM-PON by Cai, Frank Laifa

“…At the Central Office (CO), two DRAs are used by employing co-propagating pumping technique to achieve high gain after propagating through a 120km feeder fiber. In addition, an EDFA was also employed just before the demultiplexer at the CO to amplify the uplink transmission signals. …”
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Development of cavity ringdown long period grating pressure sensor. by Wong, Wei Chang.

“…This sensor measures the intensity of an input pulse as it is subjected to losses comprised of the fiber absorption loss, the fiber couplers insertion loss, the fiber scattering loss, attenuator loss, LPG transmission attenuation and deduction of erbium-doped fiber amplifier’s (EDFA) gain. The derivation of equations for the relationship between those losses of cavity ring-down and long period gratings with pressure is shown. …”
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