Flat-gain and wide-band partial double-pass erbium co-doped fiber amplifier with hybrid gain medium

Almukhtar, Aya A.; Al-Azzawi, Alabbas A.; Ahmad, Bilal; Cheng, X.S.; Reddy, P. Harshavardhan; Dhar, Anirban; Paul, Mukul Chandra; Ahmad, Harith; Harun, Sulaiman Wadi

doi:10.1016/j.yofte.2019.101952

Cited by 12 publications

(6 citation statements)

References 28 publications

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“…The new HFA demonstrates enhanced amplifier performance in terms of large fiber span, wide gain flatness bandwidth, and improved pump efficiency [1,2,3,4]. A serial combination was performed first between the two amplifiers to form a serial hybrid-fiber amplifier (SHFA) [5,6,7,8,9]. SHFA generally has one single path with two amplification stages.…”

Section: Introductionmentioning

confidence: 99%

“…Complex fiber Bragg grating arrays introduced [7] into the SHFA configuration obtained an enhanced gain variation of 65 nm (1530-1595 nm) with a small gain variation of 0.2 dB. A partial double pass EDFA with hybrid gain medium was proposed by [8]. Up to 17.2 dB gain level that uned over flat gain bandwidth of 55 nm from 1545 to 1600 nm was presented at large input signal power of -10 dBm.…”

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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Widely flatness gain bandwidth with double pass parallel hybrid fiber amplifier

et al. 2021

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“…Hybrid fiber amplifiers (HFAs) that combine erbium-doped fiber amplifier (EDFA) and Raman fiber amplifier (RFA) were implemented in previous studies to enhance the performance of optical amplifiers in many parameters, namely, decrease the optical fiber nonlinearities, increase the optical span length, increase the overall gain bandwidth, and enhance the pump power efficiency. 1,2 Generally, two HFA approaches have been designed: serial HFA (SHFA), [3][4][5][6][7][8][9][10] and parallel HFA (PHFA). [11][12][13][14][15][16][17][18] The optical signal propagation path is the main difference between these two amplifier approaches.…”

Section: Introductionmentioning

confidence: 99%

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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“…1,2 Considering that silica fibers have a wide low loss spectral band between approximately 1400-1700 nm, it is understood that ultra-broadband amplifiers are needed for long distance DWDM systems to reach their maximum capacity. [3][4][5][6][7] In the last few years, therefore, further research has been focused on developing broadband fiber optical amplifiers with high gain efficiency, high output power, gain clamping and gain flattening capabilities to cope with the increasing capacity demand experienced in optically amplified broadband optical communication systems and distribution networks. 8,9 Apart from conventional band erbium-doped fiber amplifiers (C-EDFA or shortly EDFA), one of the new research area of broadband optical amplifiers is to develop high performance erbium-doped fiber amplifiers operating in L band (L-EDFA).…”

Section: Introductionmentioning

confidence: 99%

Gain‐clamping in L‐band zirconium–erbium co‐doped fiber amplifier with FBG based lasing control

Sadik

Durak

Paul

et al. 2021

Micro & Optical Tech Letters

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In this study, gain clamping performance in an L-band zirconium-erbium co-doped fiber amplifier (Zr-EDFA) with a very short length of heavily doped fiber and FBG based lasing control structure was presented. A simple gain clamping design based on a symmetrical narrow band C-band fiber Bragg grating (FBG) pair addition was used in the L-band Zr-EDFA with bidirectionally pumping scheme. An L-band gain of higher than 25 dB was obtained with a maximum noise figure (NF) of 5 dB in the conventional Zr-EDFA design which was higher than the previous results obtained with forward pumping scheme. When a couple of narrow band FBGs at Bragg reflection wavelength of 1542 nm are used as the lasing mechanism for gain clamping in L-band operation, small signal gain of Zr-EDFA decreases, but on the other hand, the gain is clamped at almost 15.5 dB with a flattened gain spectrum along a dynamic range of 25 dB for the signal input powers between À30 and À5 dBm with the expense of 1.5 dB NF penalty.

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Flat-gain and wide-band partial double-pass erbium co-doped fiber amplifier with hybrid gain medium

Cited by 12 publications

References 28 publications

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

Gain‐clamping in L‐band zirconium–erbium co‐doped fiber amplifier with FBG based lasing control

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