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 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.

Comparative Characteristics between L-Band EDFA, L-Band EDFA Utilising Single FBG and Dual Stage L-Band EDFA Utilising Dual FBG Configurations

2015 ◽  
Vol 815 ◽  
pp. 348-352 ◽  
Author(s):  
M. Safuan Zainudin ◽  
N.A.M. Ahmad Hambali ◽  
Goh Chee Seong ◽  
M. Shakirin Abu Hurera ◽  
N. Roshidah ◽  
...  
Keyword(s):  
Input Signal ◽  
Gain Medium ◽  
Signal Power ◽  
Low Input ◽  
Gain Enhancement ◽  
Band Region ◽  
Input Signal Power ◽  
Dual Stage ◽  
M 12 ◽  
L Band

The development was conducted with three configurations of L-Band EDFA, L-Band EDFA utilising Single FBG and Dual Stage L-Band EDFA utilising Dual FBG. The configurations utilising the FBG using 35 meter M-12 Fibercore EDF as the gain medium to amplify the input signal power in the L-band region. The gain enhancement has shown by the Dual Stage L-Band EDFA utilising Dual FBG by injecting low input signal power of -10 dBm. The flat amplitude of OSNR at 33.358 dB was produced at injected wavelength from 1570 nm to 1605 nm.

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 Simulation of dual stage thulium-doped fiber amplifier using pump power distribution technique

2019 ◽  
Vol 15 (3) ◽  
pp. 1203
Author(s):  
Muhammad Syauqi Kusyairi Bin Jamalus ◽  
Nelidya Md. Yusoff ◽  
Abdul Hadi Sulaiman
Keyword(s):  
Pump Power ◽  
Output Power ◽  
Power Distribution ◽  
Noise Figure ◽  
Signal To Noise Ratio ◽  
Fiber Amplifier ◽  
Gain Medium ◽  
Optical Signal ◽  
Double Pass ◽  
Dual Stage

<span>This paper shows dual stage thulium-doped fiber amplifiers (TDFAs) that use a pump power distribution technique. Simulations were done with signals ranging from 1975 nm to 2000 nm using the OptiSystem v.13 software. The results required were gathered from the software. The results of gain, noise figure, optical signal-to-noise ratio (OSNR) and output power were obtained. The highest gain and lowest noise figure results were achieved for the double pass dual stage TDFA configuration with values of 19.85 dB and 5.58 dB respectively, followed by the single pass dual stage TDFA. The OSNR and output power performances were also better for the double pass dual stage TDFA, obtaining 57.12 dB and 19.55 dBm respectively. This study shows that thulium can be used in the 2 µm region as an active gain medium and the dual stage architecture and distributed pumping technique proves to be effective techniques to obtain the desired results. Experimental work will be done in the future with the simulated results used as a reference.</span>

An efficient L-band Zirconia Yttria Aluminum Erbium co-doped fiber amplifier with 1480nm pumping

2019 ◽  
Vol 28 (02) ◽  
pp. 1950018
Author(s):  
Aya A. Almukhtar ◽  
Alabbas A. Al-Azzawi ◽  
P. H. Reddy ◽  
S. Das ◽  
A. Dhar ◽  
...  
Keyword(s):  
Noise Figure ◽  
Wavelength Region ◽  
Fiber Amplifier ◽  
Gain Medium ◽  
Double Pass ◽  
Erbium Doped Fiber Amplifier ◽  
Optical Amplification ◽  
Single Pass ◽  
Flat Gain ◽  
Co Doped

The optical amplification performance of the proposed Zirconia Yttria Aluminum Erbium co-doped fiber (Zr-EDF) was compared for two different pumping schemes; 1480 and 980[Formula: see text]nm. An efficient [Formula: see text]-band amplifier was achieved using 3[Formula: see text]m length of Zr-EDF while 1480[Formula: see text]nm pumping is found to provide higher attainable gain and better noise figure as compared to 980[Formula: see text]nm pumping. At a pumping wavelength of 1480[Formula: see text]nm and an input signal power of [Formula: see text]10[Formula: see text]dBm, the proposed amplifier provides a relatively flat-gain of about 13.3[Formula: see text]and 17.3[Formula: see text]dB with single-pass and double-pass configuration, respectively, where the gain variation was less than 1[Formula: see text]dB within a wavelength region of 1560–1600[Formula: see text]nm. The noise figures of the proposed Zr-EDFA were maintained below 8 and 14.5[Formula: see text]dB for single-pass and double-pass arrangement, respectively, within the flat-gain region. Compared to the conventional amplifier configured with silica based erbium-doped fiber amplifier, the proposed Zr-EDF-based amplifier achieves a higher and flatter gain and lower noise figure at [Formula: see text]-band region even though it uses a shorter length of gain medium.

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.

Gain and Noise Figure Performances of L–Band EDFA with an Injection of C–Band ASE

2012 ◽  
Author(s):  
Sulaiman Wadi Harun ◽  
T. Subramaniam ◽  
Nizam Tamchek ◽  
Harith Ahmad
Keyword(s):  
Spontaneous Emission ◽  
Noise Figure ◽  
Amplified Spontaneous Emission ◽  
Fiber Amplifier ◽  
Optical Amplifier ◽  
Injection Technique ◽  
Erbium Doped Fiber Amplifier ◽  
Gain Enhancement ◽  
Gain Clamping ◽  
L Band

Kesan suntikan pancaran spontan terkuat (ASE) jalur–C terhadap prestasi jalur–L penguat gentian terdop–erbium (EDFA) ditunjukkan. Sebuah pekeliling dan parutan gentian Bragg lebar jalur luas digunakan untuk menyalurkan ASE jalur–C ke dalam sistem penguat. Dengan penyuntikan sejumlah kecil ASE (20 dB pelemahan dan lebih), gandaan isyarat kecil ditingkatkan tanpa peningkatan nilai hingar berbanding penguat tanpa suntikan ASE. Peningkatan gandaan maksimum adalah sebanyak 3.5 dB dan dicapai semasa pelemahan 20 dB untuk isyarat 1580 nm. Walau bagaimanapun, jika penguat disuntik dengan jumlah ASE yang besar (VOA=0 dB), gandaan penguat didapati mendatar pada 15.2 dB dari –40 hingga –10 dBm dengan variasi gandaan kurang daripada 0.3 dB. Kuasa tepu juga bertambah dari –8 dBm (semasa tiada ASE) kepada 2 dBm (VOA=0 dB) dengan sedikit peningkatan nilai hingar. Keputusan ini menunjukkan bahawa teknik menyuntik ASE boleh digunakan sama ada untuk meningkatkan gandaan atau untuk menetapkan nilai gandaan dalam EDFA jalur–L. Kata kunci: Penetapan gandaan, penguat optik, EDFA jalur-L, penambahan gandaan, pancaran spontan terkuat The effect of injecting conventional band amplified spontaneous emission (C–band ASE) on the performance of long wavelength band erbium–doped fiber amplifier (L–band EDFA) is demonstrated. A circulator and a broadband fiber Bragg grating (FBG) were used to route a C–band ASE into amplifier system. Injection of a small amount of ASE (attenuation of 20 dB and above) improves the small signal gain with a negligible noise figure penalty compared to that of an amplifier without the ASE injection. A maximum gain improvement of 3.5 dB is obtained at an attenuation of 20 dB for signal wavelength of 1580 nm. At very large amount of ASE injection (VOA=0 dB), the gain of the amplifier is clamped at 15.2 dB from –40 to –10 dBm with a gain variation of less than 0.3 dB. The saturation power is also increased from –8 dBm (for without ASE injection) to 2 dBm (VOA=0 dB) with a slight noise figure penalty. These results show that the ASE injection technique can be used either for gain improvement or gain clamping in L–band EDFA. Keywords: Gain clamping, optical amplifier, L-band EDFA, gain enhancement, amplified spontaneous emission

DOUBLE PASS S-BAND EDFA

2006 ◽  
Vol 15 (03) ◽  
pp. 303-307
Author(s):  
HARITH AHMAD ◽  
SULAIMAN WADI HARUN
Keyword(s):  
Pump Power ◽  
Short Wavelength ◽  
Fiber Amplifier ◽  
Small Signal Gain ◽  
Small Signal ◽  
Double Pass ◽  
Erbium Doped Fiber Amplifier ◽  
Single Pass ◽  
Gain Enhancement ◽  
Erbium Doped

A double-pass erbium-doped fiber amplifier (EDFA) based on a depressed cladding erbium-doped fiber, which operates in the short wavelength (S-band) region is proposed and demonstrated. This amplifier provides a small signal gain as high as 30 dB at 1500 nm, using only 15 m depressed cladding erbium-doped fiber (EDF) and 130 mW of 980 nm pump power. Compared to the single-pass configuration, this amplifier shows a gain enhancement of about 14 dB for pump powers above 120 mW. However, noise figures penalties of less than 0.9 dB are obtained for these pump powers. The proposed double-pass amplifier will play an important role in the development of a practical S-band EDFA from the perspective of economical usage of EDF and pump power.

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