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In this study the authors present a novel technique for control of signal power transients caused by signal add/drops in optical communication networks with erbium-doped fibre amplifiers (EDFAs). The approach utilises the electronic automatic gain control that combines both feedback and feedforward control of EDFA. Feedback control is non-linear integral control and feedforward control is a steady-state gain scheduling technique. The feedback non-linear control requires information about the average inversion level that is obtained via a simple linearised first-order observer. The scheduling variable used is the nominal pump power needed to keep the average inversion level at the desired value at steady state and the input signal powers given at particular wavelengths. In the simplified gain scheduling version, the scheduling variable is the total input signal power. Simulation examples indicate that the proposed controller completely eliminates at steady state the photon power transients caused by signal add/drops with the steady state being reached within a few milliseconds.
References
-
-
1)
-
17. Li, H., Zhang, Y., Soh, Y., Wen, C.: ‘Design and analysis of dynamic erbium-doped fiber amplifier gain-clamping systems with feedback control’, J. Opt. Soc. Am. B, Opt. Phys., 2007, 24, pp. 1739–1748 (doi: 10.1364/JOSAB.24.001739).
-
2)
-
29. Liaw, S., Dou, L., Xu, A., Huang, Y.: ‘Optimally flattened and dispersion-managed C + L-band hybrid amplifier using a single-wavelength pump laser’, Opt. Commun., 2009, 28, pp. 4087–4090 (doi: 10.1016/j.optcom.2009.06.075).
-
3)
-
37. Sarmani, A., Shieh, S., Adikan, F., Mahdi, M.: ‘Spectral hole burning effects initiated by uniform signal itensities in a gain-flattened EDFA’, Chinese Opt. Lett., 2011, 9, (doi: 10.3788/COL201109.020603).
-
4)
-
21. Slotine, J., Li, W.: ‘Applied nonlinear control’ (Prentice-Hall, Englewood Cliffs, NJ, 1991).
-
5)
-
13. Co, J., Cho, M., Won, Y.: ‘Feed-forward control of transient gain dynamics of an EDFA for optical burst networks’, ETRI J., 2007, 29, pp. 679–681 (doi: 10.4218/etrij.07.0207.0082).
-
6)
-
34. Qiao, L., Vella, O.: ‘ASE analysis and correction for EDFA automatic control’, J. Lightwave Technol., 2007, 25, pp. 771–778 (doi: 10.1109/JLT.2006.889665).
-
7)
-
R.J. Mears ,
L. Reekie ,
I.M. Jauncey ,
D.N. Payne
.
Low-noise erbium-doped fibre amplifier operating at 1.54 µm.
Electron. Lett.
,
19 ,
1026 -
1028
-
8)
-
14. Vijayakumar, N., Sreeja, R.: ‘A feed forward method for stabilizing the gain and output power of an erbium-doped fiber amplifier’, Microw. Opt. Technol., 2009, 51, pp. 2156–2160 (doi: 10.1002/mop.24554).
-
9)
-
30. Song, S., Park, S.: ‘Theoretical design and analysis of EDFA gain control system based on two-level EDFA model’, Stud. Inf. Control, 2013, 22, pp. 97–105.
-
10)
-
22. Khalil, H.: ‘Nonlinear systems’ (Prentice-Hall, Englewood Cliffs, NJ, 2002).
-
11)
-
16. Bakar, A., Mahdi, M., Al-Mansoori, M., Shaari, S., Zamzuri, A.: ‘Opto-optical gain-clamped L-band erbium-doped fiber amplifier with C—band control signal’, Appl. Opt., 2009, 48, pp. 2340–2343 (doi: 10.1364/AO.48.002340).
-
12)
-
9. Chung, H., Lee, H., Lee, J., Chu, M., Lee, J.: ‘Reduction of relaxation oscillations in optical automatic gain clamped EDFA using fast electronic feedforward’, Electron. Lett., 2001, 38, pp. 215–217 (doi: 10.1049/el:20020153).
-
13)
-
28. Sun, Y., Zyskind, J., Srivastava, K.: ‘Average inversion model, modeling, and physics of erbium-doped fiber amplifiers’, IEEE J. Sel. Top. Quantum Electron., 1997, 3, pp. 991–1007 (doi: 10.1109/2944.649527).
-
14)
-
15. Ramaswami, R., Sivarajan, K.: ‘Optical networks: a practical perspective’ (Morgan and Kaufman, San Francisco, 1998).
-
15)
-
Y. Sun
.
Model for gain dynamics in erbium-doped fibre amplifiers.
Electron. Lett.
,
1490 -
1491
-
16)
-
31. Tonguz, O., Flood, F.: ‘Gain equalization in EDFA cascades’, J. Lightwave Technol., 1997, 15, pp. 1832–1841 (doi: 10.1109/50.633567).
-
17)
-
10. Pachnicke, S., Krummrich, P., Voges, E., Gottwald, E.: ‘Transient gain dynamics in long-haul transmission systems with electronic EDFA gain control’, J. Opt. Netw., 2007, 6, pp. 1129–1137 (doi: 10.1364/JON.6.001129).
-
18)
-
18. Neto, B., Reis, C., Dionisio, R., et al: ‘Assesment and mitigation of Erbium-doped fibre amplifiers (EDFS) gain transients in hybrid wavelength division multiplexing/time division multiplexing passive optical network (WDM/TDM PON) in the presence of packet-based traffic’, IET Optoelectron., Special Issue – Next Generation of Optical Access, 2010, 4, pp. 219–225.
-
19)
-
36. Rapp, L., Ferreira, L.: ‘Dynamics of spectral hole burning in EDFAs: dependency on pump wavelength and pump power’, IEEE Photonics Technol. Lett., 2010, 22, pp. 1256–1258 (doi: 10.1109/LPT.2010.2052798).
-
20)
-
39. Desurvire, E.: ‘An explicit analytical solution for the transcendental equation describing saturated erbium-doped fiber amplifiers’, Opt. Fiber Technol., 1996, 2, pp. 367–377 (doi: 10.1006/ofte.1996.0042).
-
21)
-
4. Karasek, M., van der Plaats, J.: ‘Analysis of dynamic pump-loss controlled gain-locking system for erbium-doped fiber amplifiers’, IEEE Photonics Technol. Lett., 1998, 10, pp. 1171–1173 (doi: 10.1109/68.701540).
-
22)
-
33. Karasek, M., Menif, M., Rusch, L.: ‘Modeling gain dynamics in EDFAs: Space-resolved versus lumped models’, Fiber Integr. Opt., 2001, 20, pp. 601–605 (doi: 10.1080/014680301317081043).
-
23)
-
20. Stefanovic, N., Ding, M., Pavel, L.: ‘An application of L-2 nonlinear control and gain scheduling to erbium doped fiber amplifiers’, Control Eng. Pract., 2007, 15, pp. 1107–1117 (doi: 10.1016/j.conengprac.2007.01.010).
-
24)
-
26. Morkel, P., Laming, R.: ‘Theoretical modeling of erbium-doped fiber amplifiers’, Opt. Lett., 1989, 14, pp. 1062–1064 (doi: 10.1364/OL.14.001062).
-
25)
-
1. Desurvire, E.: ‘Erbium-doped fiber amplifiers’ (Wiley, New York, 1994).
-
26)
-
7. Richards, D., Jackel, J., Ali, M.: ‘A theoretical investigation of dynamic all-optical automatic gain control in multichannel EDFA's and EDFA cascades’, IEEE J. Sel. Top. Quantum Electron., 1997, 3, pp. 1027–1036 (doi: 10.1109/2944.649534).
-
27)
-
6. Tian, C., Kinoshita, S.: ‘Analysis and control of transient dynamics of EDFA pumped by 1480- and 980-nm lasers’, J. Lightwave Technol., 2003, 21, pp. 1728–1741 (doi: 10.1109/JLT.2003.815649).
-
28)
-
5. Biancoitto, A., Carena, A., Ferrero, V., Gaudino, R.: ‘EDFA gain transients: experimental demonstration of a low cost electronic control’, IEEE Photonics Technol. Lett., 2003, 15, pp. 1351–1353 (doi: 10.1109/LPT.2003.818267).
-
29)
-
25. Desurvire, E., Simpson, J., Backer, P.: ‘High-gain erbium-doped traveling-wave fiber amplifier’, Opt. Lett., 1987, 12, pp. 888–890 (doi: 10.1364/OL.12.000888).
-
30)
-
19. Tiang, Y., Pavel, L.: ‘An EDFA H-infinity controller to suppress ion of power excursions due to pilot tones and network traffic’, IEEE Photonics Technol. Lett., 2006, 18, pp. 1916–1918 (doi: 10.1109/LPT.2006.881664).
-
31)
-
2. Takahashi, N., Hirono, T., Akasji, H., Takahashi, S., Sasaki, T.: ‘An output power stabilized erbium-doped fiber amplifier with automatic gain control’, IEEE J. Sel. Top. Quantum Electron., 1997, 3, pp. 1019–1026 (doi: 10.1109/2944.649533).
-
32)
-
35. Sulhoff, I., Srivastava, A., Wolf, C., Sun, Y., Zyskind, J.: ‘Spectral hole- burning in erbium-doped silica and fluoride fibers’, IEEE Photonics Technol. Lett., 1997, 9, pp. 1578–1579 (doi: 10.1109/68.643268).
-
33)
-
3. Park, S., Kim, H., Lyu, G., Kang, S., Shin, S.-Y.: ‘Dynamic gain and output power control in a gain-flattened erbium-doped fiber amplifier’, IEEE Photonics Technol. Lett., 1998, 10, pp. 787–789 (doi: 10.1109/68.681484).
-
34)
-
W.J. Rugh ,
J.S. Shamma
.
Research on gain scheduling.
Automatica
,
10 ,
1401 -
1425
-
35)
-
11. Shen, J., Lee, Y., Huang, C.: ‘L-band automatic-gain-controlled erbium-doped fiber amplifier utilizing C-band backward-amplified spontaneous emission and electrical feedback monitor’, Appl. Opt., 2009, 48, pp. 842–846 (doi: 10.1364/AO.48.000842).
-
36)
-
M. Karasek ,
A. Bononi ,
L.A. Rusch ,
M. Menif
.
Gain stabilization in gain clamped EDFA cascades fed by WDM burst-mode packet traffic.
J. Lightwave Technol.
,
3 ,
308 -
313
-
37)
-
38. Saleh, A., Evankow, R., Aspell, J.: ‘Modeling of gain in erbium-doped fiber amplifiers’, IEEE Photonics Technol. Lett., 1990, 2, pp. 714–717 (doi: 10.1109/68.60769).
-
38)
-
12. Radisavljevic, V.: ‘A new feed-forward/feedback scheme for elimination of power transients in erbium-doped optical fiber amplifiers’, Dyn. Continuous Discrete Impulsive Syst., , 2005, 12, pp. 708–712.
-
39)
-
32. Mecozzi, A., Marcenac, D.: ‘Theory of optical amplifier chains’, J. Lightwave Technol., 1998, 16, pp. 745–756 (doi: 10.1109/50.669002).
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