Gain-control technique in double-pass parallel hybrid fiber amplifier

Ali, M. H.; Abdullah, Fairuz; Al-Mashhadani, Thamer Fahad

doi:10.1007/s11082-020-02508-0

Cited by 13 publications

(12 citation statements)

References 13 publications

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“…The results clearly showed the satisfactory performance of the proposed amplifier, which can operate up to -15 dBm without a saturation effect. Finally, the results of our design exhibited a wider gain bandwidth and larger gain level compared with the findings in [9,10,11,12,13,14,15,16,17,18]. Table 1 summarizes the results of the performance evaluation of our work and previous studies.…”

Section: Resultsmentioning

confidence: 58%

“…A wide flatness gain bandwidth of 60 nm (1530-1590 nm) and an average gain level of 14 dB were observed using 800 mW of Raman pump power at 1480 nm [13]. The implementation of double-pass PHFA achieved an enhancement of 38.5 % and 18.7 % in gain level and pump power, respectively [14]. However, two major limitations still exist, namely, phase mismatch between amplified signals after these two branches due to the long signal propagation in DCF and possible absence of dispersion compensation in EDF.…”

Section: Introductionmentioning

confidence: 95%

“…However, flatness gain bandwidth was reduced to 45 nm (1555-1600) and no study was conducted at low input signal power. Parallel HFA (PHFA) was proposed by many researchers to avoid gain saturation and limited gain dynamic range caused by the cascading process in SHFA [10,11,12,13,14]. The cascading effect was absent, but the signal was divided into two different individual amplifiers for re-accumulation in the PHFA.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a large input signal power can induce degradation in the EDFA branch. The input signal power was divided into two PHFA branches instead of dividing the input signal wavelength to prevent this limitation [13,14]. Gain control technique is used in PHFA to control the amount of input signal power to each amplifier.…”

Section: Introductionmentioning

confidence: 99%

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Widely flatness gain bandwidth with double pass parallel hybrid fiber amplifier

et al. 2021

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A Widely flatness gainbandwidth with double pass parallel hybrid fiber amplifier is experimentally demonstrated in this study. The proposed design combines serial erbium-Raman fiber amplifier in one branch and Raman fiber amplifier in the second branch. Multiple Raman pump units with a maximum power of 800 mW (250 mW of 1410 nm, 225 mW of 1480 nm, and 325 mW of 1495 nm) are utilized. Pump recycling technique is applied to achieve acceptable pumping efficiency. A maximum flatness gain bandwidth of 80 nm (1525-1605 nm) and average gain level of 22.5 dB are obtained at a small input signal power of -25 dBm and optimum pump power values. By comparison, a wider flatness gain of 90 nm (1520-1610 nm) and average gain level of 11.5 dB are achieved at a large input signal power of -5 dBm.

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Section: Resultsmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Widely flatness gain bandwidth with double pass parallel hybrid fiber amplifier

et al. 2021

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“…3 c. The results clearly showed the satisfactory performance of the proposed amplifier, which can operate up to -15 dBm without a saturation effect. Finally, the results of our design exhibited a wider gain bandwidth and larger gain level compared with the findings in [9,10,11,12,13,14,15,16,17,18]. Table 1 summarizes the results of the performance evaluation of our work and previous studies.…”

Section: Methodsmentioning

confidence: 58%

Widely Flatness Gain Bandwidth with Double Pass Parallel Hybrid Fiber Amplifier

Gurkaynak

Al-Mashhadani

Ali

et al. 2021

Preprint

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A Widely flatness gain bandwidth with double pass parallel hybrid fiber amplifier is experimentally demonstrated in this study. The proposed design combines serial erbium–Raman fiber amplifier in one branch and Raman fiber amplifier in the second branch. Multiple Raman pump units with a maximum power of 800 mW (250 mW of 1410 nm, 225 mW of 1480 nm, and 325 mW of 1495 nm) are utilized. Pump recycling technique is applied to achieve acceptable pumping efficiency. A maximum flatness gain bandwidth of 80 nm (1525–1605 nm) and average gain level of 22.5 dB are obtained at a small input signal power of -25 dBm and optimum pump power values. By comparison, a wider flatness gain of 90 nm (1520–1610 nm) and average gain level of 11.5 dB are achieved at a large input signal power of -5 dBm.

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An efficient wide flatness gain bandwidth with parallel hybrid fiber amplifier

Gurkaynak

Al-Mashhadani

et al. 2021

Micro & Optical Tech Letters

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In this article, we experimentally propose an efficient wide flat gain bandwidth with a parallel hybrid fiber amplifier. The setup includes parallel amplifier branches. In the first branch, serial erbium-doped and Raman fiber amplifiers are used. In the second branch, only a Raman fiber amplifier is used. Three Raman pump power units (i.e., 1410, 1480, and 1495 nm) are used to achieve Raman gain at different optical communication bands. At optimum pump powers and at a small-signal power of À30 dBm, an average gain of 18.5 dB with a maximum gain variation of 3 dB and a gain flatness bandwidth of 83 nm, that is, from 1527 to 1610 nm, is achieved. This gain flatness is expanded to 92 nm (1525-1617 nm) at a large input signal power of À5 dBm with an average gain level of 13 dB. In our proposed amplifier, the Raman amplification peaks (1510 and 1595 nm) are chosen to be far from the erbium amplification peak (1530-1570 nm) in order to avoid the overlapping and the saturation in the first amplifier branch. Therefore, due to such wavelength optimization in addition to the recycling the residual Raman pump power, a wide flatness gain bandwidth is achieved for both of low and large input signal powers.

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Gain-control technique in double-pass parallel hybrid fiber amplifier

Cited by 13 publications

References 13 publications

Widely flatness gain bandwidth with double pass parallel hybrid fiber amplifier

Widely flatness gain bandwidth with double pass parallel hybrid fiber amplifier

Widely Flatness Gain Bandwidth with Double Pass Parallel Hybrid Fiber Amplifier

An efficient wide flatness gain bandwidth with parallel hybrid fiber amplifier

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