paper title - IRD India

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Performance Analysis of Different Hybrid Amplifiers Configurations for Variable Channels Wdm System

1Jagneet Kaur, ²Inderpreet Kaur

1,2EE Department Chandigarh University Mohali, Punjab. India.

Abstract : In this paper different configurations of hybrid optical amplifiers has been analyzed for 16, 32 and 64 channels. The analysis is based on the comparisons of different configurations of hybrid optical amplifiers consisting of EDFA and FRA with several combinations of their parameters like maximum quality factor, threshold, height, minimum BER, decision instrument. It is observed that performance comparison of different configurations based on proposed parameters is best for 16 channel followed by 32 and 64 channel respectively. Among amplifiers quality factor is highest for EDFA (Erbium doped fiber amplifier) and FRA (fiber FRA amplifier) at all the amplifiers.

Keywords—EDFA-FRA;FRA-EDFA;EDFA-EDFA;FRA- FRA; WDM.

I. INTRODUCTION

Due to emerging technology, optical system is considered as base of technology for the transmission.

Whereas, WDM technology in fiber optic communication multiplexes several optical carrier signals into single optical fiber by means of separate wavelengths. To increase transmission capacity of a fiber, the best way is WDM, of optical signals [1-3].

Through WDM we can explore higher bandwidth available with low capacity channels in optical fiber. In an optical network, switching can be electrical or optical that directly amplifies the optical signals for transmission without any conversion to any form [4].

Additionally, it can be used for long distance transmission [5]. WDM uses similar window for transmission but channel spacing is very dense. In this case plans for channels varies i.e. in a typical system, there is use of 40 channels at 100GHz spacing or 80 channels with 50GHz. The cascading a EDFA (Erbium doped fiber amplifier) and FRA (fiber FRA amplifier) may be called as hybrid fiber amplifier [6]. There are two varieties of hybrid amplifier (HA) i.e. seamless and narrowband amplifier and seamless and wideband hybrid amplifier. There is increase in transmission and before the receiver without any splitter. There is non- linearity‟s of fibers and their impact to compare configuration of different systems width a target signal to noise ratio, the maximum distance that is reachable can be evaluated. A prediction was that during the combination of FRA amplification and Erbium doped

fiber, there is increase in span length and maximum reachable distance. To reduce the fiber non-linearity impact, FRA amplification can be used [7]. Further there is description that three stage amplifier with L band fiber is a new hybrid composed of two EDFA (Erbium doped fiber amplifier) over gain bandwidth of 1540 to 1600nm and a semiconductor optical amplifier. Through this amplifier, there is spontaneous light emission source through amplified broadband. Moreover it was experimentally proved this new hybrid L band. He also proposed that amplifier is important for various WDM network applications [8]. However a design composed of EDFA (Erbium doped fiber amplifier and FRA amplifier for hybrid amplifier was described through numerical simulations on the basis of FRA gain coefficient of single fiber mode, on the basis of which distributed FRA amplifier was characterized. For optical transmission of long haul there was estimation of its performance. Double Rayleigh scattering causes the crosstalk in single channel amplification was independent of signal input power gives a function of FRA gain [9].

In this paper, authors proposed a comparative analysis for three different channels of WDM system i.e. 16, 32, 64 with additional comparison of EDFA-FRA, FRA- FRA, FRA-EDFA, EDFA-EDFA to examine quality factor, threshold, max BER and other related parameters.

Figure 1 shows The WDM system that transmits sixteen wavelengths ranging from 1471 nm to 1611 nm. The transmitter subsystem comprises of input signals and a multiplexer. Then, in the optical transmission link, several fiber spools are placed before the receiver subsystem which consists of a demultiplexer.

Figure. 1a

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Figure. 1b

Figure. 1c

Figure. 1d

Figure 1(a-d): Transmissions of sixteen wavelengths ranging from 1471 nm to 1611 nm in 4 different combinations. 1a. When both EDFA –EDFA are connected. 1b. When EDFA and FRA Amplifiers are

connected. 1c. When FRA-FRA amplifiers are connected. 1d. When FRA-EDFA amplifiers are

connected.

The WDM system as shown in Fig. 2 transmits thirty two four wavelengths ranging from 1471 nm to 1611 nm. The transmitter subsystem comprises of input signals and a multiplexer.

Figure. 2a

Figure. 2b

Figure. 2c

Figure. 2d

Figure 2(a-d): Transmissions of thirty two wavelengths ranging from 1471 nm to 1611 nm in 4 different combinations. 2a. When EDFA and FRA Amplifiers are

connected. 2b. When FRA and EDFA Amplifiers are connected. 2c. When FRA and FRA Amplifiers are connected. 2d. When EDFA and EDFA Amplifiers are

connected.

The WDM system as shown in Fig. 3. transmits sixty four wavelengths ranging from 1471 nm to 1611 nm.

The transmitter subsystem comprises of input signals and a multiplexer. Then, in the optical transmission link, several fiber spools are placed before the receiver subsystem which consists of a demultiplexer.

Figure. 3a

Figure. 3b

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Figure. 3c

Figure. 3d

Figure 3(a-d). Ttransmissions of sixty four wavelengths ranging from 1471 nm to 1611 nm in 4 different combinations. 3a: When EDFA-EDFA are connected.

3b:When FRA and EDFA Amplifiers are connected. 3c:

When FRA and FRA Amplifiers are connected. 3d:

When EDFA and EDFA Amplifiers are connected.

Performance analysis of different configurations of hybrid amplifiers for 16 channels is shown in figure 4.

Figure. 4a Figure. 4b

Figure. 4c Figure. 4d Figure. 4e Figure 4. When FRA amplifier and EDFA are connected. 4a. quality factor. 4b. minimum BER. 4c.

Threshold 4d. height. 4e. BER Pattern.

Figure. 5c Figure. 5d Figure. 5e Fig 5. When EDFA amplifier and EDFA are connected.

5a. quality factor. 5b. minimum BER. 5c. Threshold 5d.

height. 5e. BER Pattern.When EDFA and FRA amplifier are connected.

Figure. 6c Figure. 6d

Figure.6e

Figure 6. When EDFA amplifier and FRA are connected. 6a. quality factor.6b. minimum BER. 6c.

Threshold 6d. height. 6e. BER Pattern

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Figure. 7e

Figure 7. When both FRA are connected. 7a. quality factor. 7b. minimum BER. 7c. Threshold 7d. height. 7e.

BER Pattern

Performance analysis of hybrid amplifier in 32 channels-

Figure. 8e

Fig 8. When EDFA amplifier and EDFA are connected.

8a. quality factor. 8b. minimum BER. 8c. Threshold 8d.

height. e. BER Pattern

Figure. 9e

Figure 9. When FRA and EDFA are connected. 9a.

quality factor. 9b. minimum BER. 9c. Threshold 9d.

height. 9e. BER Pattern

Figure. 10e

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Figure.11e

Figure 11. When FRA and FRA are connected. 11a.

Perfomance analysis of hybrid amplifier in 64 channels is shown in figures 12-16.

Figure. 12c Figure.12d

Figure. 12e

Figure 12. When EDFA and EDFA are connected.

12a. quality factor. 12b. minimum BER. 12c. Threshold 12d. height. 12e. BER Pattern

Figure. 13c Figure.13d

Figure. 13e

Figure 13. When FRA and EDFA are connected. 13a.

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Figure. 14e

Figure 14. When EDFA and FRA are connected. 14a.

Figure. 15e

Figure 15. When FRA and FRA are connected. 15a.

II. RESULTS AND ANALYSIS

Table I: Comparison of Different configurations for 16 channels

Configuration of amplifiers / Parameters FRA- EDFA EDFA-EDFA EDFA-FRA FRA-FRA

Max Q Factor 3.2389 3.2152 3.23991 2.93836

Min BER 0.000591752 0.00064 0.00058226 0.0016256

Threshold 0.0315198 0.0203097 0.000199798 0.0652333

Height 0.001800274 0.00104403 1.10948 -0.00105991

Decision Instrument 0.488281 0.5039 0.5 0.523438

Table II: Comparison of Different configurations for 32 channels

Max Q Factor 2.02205 1.96686 2.02528 2.01891

Min BER 0.0206553 0.0218049 0.0205049 0.0208165

Threshold 0.000676747 6.18151e-005 0.0006772889 0.000284706 Height -0.000223926 -2.13262e-005 00.000223477 -9.46351e-005

Decision Instrument 0.501953 0.507813 0.503906 0.503906

Table III: Comparison of Different configurations for 32 channels

Max Q Factor 2.03943 2.03632 2.04363 2.04217

Min BER 0.0200496 0.0201504 0.0198464 0.0199225

Threshold 0.00252349 0.00252761 0.00171625 0.000286547

Height 0.000826 0.0008338 -0.00055794 -9.33076e-005

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comparision of all channels , 16 channels has fantastic performance related to quality factor. So it is proposed that EDFA-FRA combination has maximum quality factor for communication.

REFRENCES

[1] I., Kaur, N., Gupta, “Enhancing the Performance of WDM Systems by Using TFF in Hybrid Amplifiers”, 2010 IEEE 2nd International Advance Computing Conference, Patiala, India, pp 106-109, Feb 2010.

[2] Kaur, Inderpreet, Gupta, Neena, “Increasing the Amplification Bandwidth of Erbium Doped Fiber Amplifiers by Using a Cascaded Raman-EDFA Configuration”, Photonics 2008, P.284, Dec.

2008 at IIT, Delhi.

[3] I., Kaur, N., Gupta, “Hybrid Fiber Amplifiers”

1st Edition, InTech Publishers, 2012, Chapter 4, ISBN: 97-87953-51-0170-3.

[5] Biswanath Mukherjee, „Optical WDM Networks‟, University of California, pg 15-18 [6] G.P.Aggarwal, „ Fibre Optic Comm.‟, John

Wiley and Sons, New York, pg 226

[7] A.Carena,V.Curri and P.Poggiolini, „On the Optimization of Hybrid Raman/Erbium-Doped Fiber Amplifiers‟, Vol. 13, NO. 11, Nov 2001, pg 1170-1172

[8] Chien-Hung Yeh, Kuo Hsiang Lai, Ying Jie HUANG Chien-Chung LEE and Sien CHI. ‟ Hybrid L-Band Optical Fiber Amplifier Module with Erbium-Doped Fiber Amplifiers and Semiconductor Optical Amplifier‟, Vol. 43, No.

8A, 2004, pg 5357–5358

[9] Seung Kwan Kim, Sun Hyok Chang, Jin Soo Han, and Moo Jung Chu. Design of Hybrid Optical Amplifiers for High Capacity Optical Transmission, Vol 24, No2, 2002, pg-81-96.

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