Temperature independent length optimization of L-band EDFAs providing flat gain

Turk J Elec Eng & Comp Sci

Mustafa²

2016

Erbium-doped fiber amplifiers (EDFAs) have great importance in long-distance communication. It is required to have equal gain for all signals that are transferred and to avoid loss in the receiver of long-distance communication systems. However, temperature dependence changes the output spectrum of the designed gain-flattening systems. In this study, each erbium-doped fiber (EDF) length of a two-stage L-band EDFA has been optimized using a genetic algorithm method; because of the temperature dependence of EDFAs, there is no general rule. Thus, a simple, fast, dynamic, and highly accurate model has been developed and obtained for different EDF lengths that will fix gain along the L-band. The results have been shown to be very compatible with the previously obtained numerical values.

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Theoretical Analysismentioning

confidence: 99%

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Optimization with genetic algorithm of temperature-dependent fiber length of L-band EDFA gain

Turk J Elec Eng & Comp Sci

Mustafa²

2016

“…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].…”

Section: Introductionmentioning

confidence: 99%

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

2013 8th International Conference on Electrical and Electronics Engineering (ELECO)

Aslan²,

Çelebi

et al. 2013

Self Cite

In this study, designed and optimized C and L band ErbiumDoped Fiber Amplifiers (EDFA) around 70 nm bandwidth, 36.53 dB average gain with an average noise figure of 5.8 dB properties are used. For this purpose, 16 channels Wavelength Division Multiplexed (WDM) system with channel spacing of 5.3 nm is taken into account. -30 dBm powers at the input signals (1530 nm-1610 nm) are applied to three port filter and then input signals are separated into C and L bands. Each band signals are separately amplified in double pass configuration. Finally, all signals are combined into a coupler and the overall configuration has wide bandwidth, high gain and low noise.

“…Flat gain profile for erbium‐doped fiber amplifiers (EDFAs) is an important parameter in wavelength division multiplexing (WDM) and dense WDM applications for long haul optical systems and networks [1–4]. In addition to that the signals that are added/dropped from these systems change the output signal level of each channel producing remarkable optical power transients that propagate throughout the optical network.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy logic‐based automatic gain controller for EDFA

Micro & Optical Tech Letters

2011

Self Cite

In this study, the fuzzy logic (FL)-based automatic gain controller (AGC) is designed to obtain a fixed gain level of erbiumdoped fiber amplifiers along C band based on experimental results. A FL-AGC with two inputs and one output is considered where the inputs are signal power and signal wavelength and the output is the pump laser current. The output gain variations are examined by varying both input signal levels from À15 to À35 dBm and signal wavelength from 1526 to 1564 nm. The results are well kept within 30-dB gain level with a ripple of 60.1 by using FL-AGC circuit.