High-gain erbium-doped fiber amplifier incorporating a double-pass amplification technique as a preamplifier

Abstract

We present a high-gain erbium-doped fiber amplifier to be utilized as a preamplifier. A double-pass amplification technique is used in the first-stage amplifier together with a tunable bandpass filter. The secondstage amplifier is a counter-pumped configuration and another tunable bandpass filter is utilized to filter out amplified spontaneous emission from the firststage amplifier. This design is able to produce a high gain of 55.6 dB and a noise figure of 6.02 dB at 1530 nm with a signal power of −45 dBm. The receiver sensitivity measurement shows that the proposed amplifier improves the minimum detectable power from −33.7 to −40.8 dBm for a bit-error rate of 10−11 at 155 Mbps.

Investigation on the effect of stimulated Raman scattering in remotely-pumped L-band erbium-doped fiber amplifier

“…In optical amplifier application, EDFA has been proven to produce substantial gain in the C-band region, reportedly as high as 55.6 dB using double-pass amplification technique [6]. The combination of EDFA with Raman fiber amplifier (RFA) has also been found to offer good manage- ment of channels variation in C-band by employing gain clamping and pump reuse techniques [7].…”

Reducing ASE Effect in Coherent Detection by Employing Double-Pass Fiber Preamplifier and Time-Domain Filter

“…Compared to a single-pass amplifier, the double-pass has higher amplification efficiency, is more cost effective and is more flexible. In the small signal regime, considered in our work, experimental results in the existing literature have shown that the double-pass amplifier is clearly superior to the single-pass amplifier (see also [14], [15]). We use the rate equations derived in Desurvire's paper [18] to study the dynamic amplification for the double-pass configuration.…”

“…Previous papers (cf. [11]- [15]) study the amplification properties of the double-pass EDFA, but they do not provide a system performance evaluation. The experimental investigation presented in this paper has been made possible by the recent availability of the polarization-maintaining (PM) fiber Bragg grating (FBG) and the PM circulator.…”

Gain and noise figure enhancements of both C and L bands double pass Erbium Doped Fiber Amplifier

“…These are single pass EDFA [24][25][26], double pass EDFA [27][28][29][30][31], many pass EDFA configurations [32][33][34], artificial intelligence applications [35][36][37][38], and temperature characterization [39][40][41][42][43]. In addition, some studies are related to both gain improvement and noise figure in double pass EDFA [44][45][46][47][48][49][50][51][52] proposed an efficient and low noise double-pass L-Band EDFA in their studies [59][60][61].…”