Polarization Analysis in Double-Pass Erbium-Doped Fiber Amplifiers With an Embedded-DCF Module

Experimental investigation of noise in double-pass erbium-doped fiber amplifiers

“…In this technique, signal is allowed to travel bi-directionally in the active medium and gain improvement is obtained if compared to conventional single-pass (SP) EDFA's. Besides this advantage, the double-pass amplification can also be utilized to design a polarization independent amplifier [2,3]. Since this technique pushes the signals to work in the saturated regime, gain-equalization can be achieved [4].…”

Efficient S-Band Amplification Using Depressed-Cladding Erbium-Doped Silica Fibers

“…The first of those was a single stage double-pass configuration, using a single amplification stage and a single pump laser [3]. This double-pass (DP) configuration had been previously proposed by us [4]. The goal of employing a DP topology was to improve the gain efficiency.…”

A hybrid high-gain double-pass erbium-doped fiber amplifier with dispersion compensation feedback loop

“…[1][2][3] used circulator, band-pass filter and variable optical Bragg grating as the reflection mechanisms with the highest reported gain being 49.06 dB with NF of 5.12 dB [3]. Dispersion compensation all this while has been using lossy technique [4][5], which will require higher amplification. In this paper, we demonstrated a new and simple method of double-pass erbiumdoped amplifer (EDFA) by using chirped fiber Bragg grating (CFBG) as the reflector as well as dispersion compensator, which compensate the dispersion and produced a gain of 53.4 dB.…”