scholarly journals Widely Flatness Gain Bandwidth with Double Pass Parallel Hybrid Fiber Amplifier

2021 ◽  
Author(s):  
Irfan Alp Gurkaynak ◽  
Mohammed Kamil Salh Al-Mashhadani ◽  
Mudhafar Hussein Ali ◽  
Thamer Fahad Al-Mashhadani ◽  
Abdullah Erkam Gunduz ◽  
...  
Keyword(s):  
Input Signal ◽  
Fiber Amplifier ◽  
Signal Power ◽  
Hybrid Fiber ◽  
Double Pass ◽  
Gain Bandwidth ◽  
Average Gain ◽  
Input Signal Power ◽  
Parallel Hybrid ◽  
Raman Fiber Amplifier

Abstract 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.

scholarly journals Widely flatness gain bandwidth with double pass parallel hybrid fiber amplifier

2021 ◽  
Vol 53 (7) ◽  
Author(s):  
Irfan Alp Gurkaynak ◽  
Mohammed Kamil Salh Al-Mashhadani ◽  
Mudhafar Hussein Ali ◽  
Thamer Fahad Al-Mashhadani ◽  
Abdullah Erkam Gunduz ◽  
...  
Keyword(s):  
Fiber Amplifier ◽  
Hybrid Fiber ◽  
Double Pass ◽  
Gain Bandwidth ◽  
Parallel Hybrid

An efficient wide flatness gain bandwidth with parallel hybrid fiber amplifier

2021 ◽  
Author(s):  
Irfan Alp Gurkaynak ◽  
Thamer Fahad Al‐Mashhadani ◽  
Mohammed Kamil Salh Al‐Mashhadani ◽  
Mudhafar Hussein Ali ◽  
Abdullah Erkam Gunduz ◽  
...  
Keyword(s):  
Fiber Amplifier ◽  
Hybrid Fiber ◽  
Gain Bandwidth ◽  
Parallel Hybrid

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

2020 ◽  
Vol 52 (9) ◽  
Author(s):  
Mudhafar Hussein Ali ◽  
Fairuz Abdullah ◽  
Thamer Fahad Al-Mashhadani
Keyword(s):  
Gain Control ◽  
Fiber Amplifier ◽  
Control Technique ◽  
Hybrid Fiber ◽  
Double Pass ◽  
Parallel Hybrid

scholarly journals Comparison of 1480 nm and 980 nm-pumped Gallium-Erbium fiber amplifier

F1000Research ◽  
2021 ◽  
Vol 10 ◽  
pp. 251
Author(s):  
Siti Azlida Ibrahim ◽  
Amilia Mansoor ◽  
Tuan Ainin Sofea Tuan Mohd Marzuki ◽  
Nasr Y. M. Omar ◽  
Hairul Azhar Abdul Rashid
Keyword(s):  
Wavelength Range ◽  
Input Signal ◽  
Noise Figure ◽  
Fiber Amplifier ◽  
Gain Medium ◽  
Small Signal ◽  
Signal Power ◽  
Signal Wavelength ◽  
Input Signal Power ◽  
Erbium Doped

Background: One way to reduce the length of the gain medium in Erbium-Doped Fiber Amplifier (EDFA) is by doping the fiber core with a high concentration of Erbium. However, this method caused ion clustering effects, which limits the EDFA’s efficiency.  In this research, the use of Gallium as a new co-dopant in erbium-doped silica fiber is explored. Methods: The new fiber, namely Gallium co-doped Erbium fiber (Ga-EDF), is used as a gain medium in an optical fiber amplifier setup. A 2-meter length of the Ga-EDF fiber was used in a single pass configuration with a forward pumping scheme at 150 mW pump power. The Ga-EDF amplifier's gain and noise figure while pumping at 980 nm and 1480 nm were compared. The amplifier's performance was evaluated as the input signal power varied between -30 dBm to 3 dB, over the wavelength range of 1520 nm to 1580 nm. Results: The 980 nm-pumped Ga-EDF amplifier achieved the maximum small-signal gain of 22.45 dB and the corresponding noise figure of 5.71 dB at the input signal wavelength of 1535 nm. Meanwhile, the 1480 nm-pumped Ga-EDF amplifier attained the maximum small-signal gain of 20.83 dB and the corresponding noise figure of 5.09 dB at the input signal wavelength of 1550 nm. At the input signal power below -20 dBm and the wavelength range 1520 nm to 1547 nm, the Ga-EDF performs better when pumped at 980 nm. Their performance is comparable at the input signal wavelength range between 1547 nm to 1580 nm. At the input signal power above -20 dBm, the 1480 nm-pumped Ga-EDF outperformed the 980 nm-pumped amplifier. Conclusions: The overall performance indicates that the gain saturation point of the 1480 nm-pumped amplifier is higher than the 980 nm-pumped.

Performance analysis on double-pass thulium-doped fiber amplifier for 16-channel WDM system at S-band

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Dunya Zeki Mohammed ◽  
Abdulmunem Kadhim Hammadi
Keyword(s):  
Input Signal ◽  
Noise Figure ◽  
Fiber Amplifier ◽  
Gain Medium ◽  
Input Power ◽  
Fiber Amplifiers ◽  
Double Pass ◽  
Gain Enhancement ◽  
Band Region ◽  
Input Signal Power

Abstract In this paper, the performance of single and double-pass thulium-doped fiber amplifiers (SD-TDFA and DP-TDFA) is analyzed in the short wavelength (S-band) region. The effect of thulium-doped fiber (TDF) length, input signal power, and input pumping power on the amplifier’s performance is comprehensively investigated on basis of gain and noise figure (NF). DP-TDFA showed a higher gain compared to single-pass configuration and that is due to double-propagation of the forwarded and amplified spontaneous emission (ASE) signal into the TDF which maximizes the achievable gain in the S-band region. At a gain medium length of 8 m, the proposed DP-TDFA showed higher gain enhancement over SP-TDFA at an input power of −20 dB compared to −40 and 0 dB input signal powers. The gain enhancement at 1470 nm is 5.6 dB, while the maximum recorded gain with the proposed double-pass configuration is 14.7 dB.

scholarly journals Comparison of 1480 nm and 980 nm-pumped Gallium-Erbium fiber amplifier

F1000Research ◽  
2021 ◽  
Vol 10 ◽  
pp. 251
Author(s):  
Siti Azlida Ibrahim ◽  
Amilia Mansoor ◽  
Tuan Ainin Sofea Tuan Mohd Marzuki ◽  
Nasr Y. M. Omar ◽  
Hairul Azhar Abdul Rashid
Keyword(s):  
Wavelength Range ◽  
Input Signal ◽  
Noise Figure ◽  
Fiber Amplifier ◽  
Gain Medium ◽  
Small Signal ◽  
Signal Power ◽  
Signal Wavelength ◽  
Input Signal Power ◽  
Erbium Doped

Background: One way to reduce the length of the gain medium in Erbium-Doped Fiber Amplifier (EDFA) is by doping the fiber core with a high concentration of Erbium. However, this method caused ion clustering effects, which limits the EDFA’s efficiency.  In this research, the use of Gallium as a new co-dopant in erbium-doped silica fiber is explored. Methods: The new fiber, namely Gallium co-doped Erbium fiber (Ga-EDF), is used as a gain medium in an optical fiber amplifier setup. A 2-meter length of the Ga-EDF fiber was used in a single pass configuration with a forward pumping scheme at 150 mW pump power. The Ga-EDF amplifier's gain and noise figure while pumping at 980 nm and 1480 nm were compared. The amplifier's performance was evaluated as the input signal power varied between -30 dBm to 3 dBm, over the wavelength range of 1520 nm to 1580 nm. Results: The 980 nm-pumped Ga-EDF amplifier achieved the maximum small-signal gain of 22.45 dB and the corresponding noise figure of 5.71 dB at the input signal wavelength of 1535 nm. Meanwhile, the 1480 nm-pumped Ga-EDF amplifier attained the maximum small-signal gain of 20.83 dB and the corresponding noise figure of 5.09 dB at the input signal wavelength of 1550 nm. At the input signal power below -20 dBm and the wavelength range 1520 nm to 1547 nm, the Ga-EDF performs better when pumped at 980 nm. Their performance is comparable at the input signal wavelength range between 1547 nm to 1580 nm. At the input signal power above -20 dBm, the 1480 nm-pumped Ga-EDF outperformed the 980 nm-pumped amplifier. Conclusions: The overall performance indicates that the gain saturation point of the 1480 nm-pumped amplifier is higher than the 980 nm-pumped.

scholarly journals MOSFET degradation dependence on input signal power in a RF power amplifier

2017 ◽  
Vol 178 ◽  
pp. 289-292 ◽  
Author(s):  
A. Crespo-Yepes ◽  
E. Barajas ◽  
J. Martin-Martinez ◽  
D. Mateo ◽  
X. Aragones ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Input Signal ◽  
Signal Power ◽  
Rf Power ◽  
Rf Power Amplifier ◽  
Input Signal Power

AMPLIFICATION AND LASING CHARACTERISTICS OF THULIUM YTTERBIUM CO-DOPED FIBER

2015 ◽  
Vol 74 (8) ◽  
Author(s):  
M. T. Ahmad ◽  
A. A. Latiff ◽  
Z. Zakaria ◽  
Z. Jusoh ◽  
H. Ahmad ◽  
...  
Keyword(s):  
Pump Power ◽  
Input Signal ◽  
Signal Power ◽  
Polarization Rotation ◽  
Nonlinear Polarization ◽  
Maximum Gain ◽  
Input Signal Power ◽  
Nonlinear Polarization Rotation ◽  
Co Doped

The amplification and lasing characteristics of the newly developed Thulium-Ytterbium co-doped fiber (TYDF) are investigated. It is obtained that both TYDF amplifier and laser operate at 1950 nm region. The maximum gain of 22.4 dB is obtained for 1942 nm signal when the 980 nm multimode pump power, TYDF length and input signal power are fixed at 1.2 W, 5 m and -20 dBm, respectively. At 5 m long of TYDF, the laser produces two prominent lines at 1960 nm and 1965 nm with peak powers of 2.8 dBm and 3.1 dBm, respectively due to the nonlinear polarization rotation (NPR) effect in the cavity.

Investigation of 16 × 10 Gbps DWDM System Based on Optimized Semiconductor Optical Amplifier

2017 ◽  
Vol 38 (3) ◽  
Author(s):  
Aruna Rani ◽  
Sanjeev Dewra
Keyword(s):  
Optical System ◽  
Bit Error Rate ◽  
Error Rate ◽  
Input Signal ◽  
Semiconductor Optical Amplifier ◽  
Optical Amplifier ◽  
Signal Power ◽  
Channel Spacing ◽  
Input Signal Power ◽  
Dwdm System

AbstractThis paper investigates the performance of an optical system based on optimized semiconductor optical amplifier (SOA) at 160 Gbps with 0.8 nm channel spacing. Transmission distances up to 280 km at –30 dBm input signal power and up to 247 km at –32 dBm input signal power with acceptable bit error rate (BER) and

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