Comparison of performances between partial double-pass and full double-pass systems in two-stage L-band EDFA

Abstract

Abstract:The two-stage L-band EDFA with partial double-pass (DP) system is compared with the full DP system. The partial DP system has a higher gain and lower noise figure at small input signal power compared with the full DP system. The small signal gain and noise figure are obtained at about 31.2 dB and 6.2 dB, respectively, for the partial DP system. The reduction of gain in full DP system is due to the double-propagation of conventionalband amplified spontaneous emission in the short length erbiumdoped fiber at the first stage that causes gain-clamping effect to the system. The higher gain in the partial DP system contributes to the lower noise figure even compared with single-pass twostage system at small input signal powers. However, at high input signal powers, the lowest noise figure is observed for the singlepass system.

High Gain / Low NF EYDFA with Distributed Pumping

“…Various configuration of EDFA/EYDFA [10][11][12][13][14][15][16] such as single stage, single stage double pass, conventional dual stage, dual stage with partial double pass, dual stage double pass, quadruple pass have been reported. Also, various combinations of hybrid amplifiers targeting higher broadband gain low noise figure are reported.…”

LabVIEW Applications for Optical Amplifier Automated Measurements, Fiber-Optic Remote Test and Fiber Sensor Systems

“…4.1 Self-calibrating automated characterization system for EDFA Ultrahigh-capacity optical transmission systems are a vital component for 21st-century telecommunications networks that support various expanding information systems such as the Internet, mobile communications, and digital cable television [15].Wavelength-divisionmultiplexing (WDM)systems employing optical amplifiers such as the erbium-dopedfiber amplifier (EDFA) are considered the most effective solution to increase data transmission capacity [16][17]. The main characteristics of EDFAs are their gain and noise figure, and their values depend on the input signal wavelength, input signal power, and pump power [4].…”

Bidirectional-pumped L-band erbium-doped fiber amplifier with pump distribution technique

“…pumping based on side pumping (GTWave) fiber tech nology has also been designed for this L band ampli fier [12]. In addition, using double pass configuration [13], and incorporating C band light assistant pump ing [14] have also been proven as one of the techniques in enhancing the gain and noise figure (NF) for L band EDFA.…”