Proposal for modeling of tapered quantum-dot semiconductor optical amplifiers

doi:10.1007/s12200-012-0289-3

Front Optoelec

2012, Vol. 5

Issue (4) : 457-464 https://doi.org/10.1007/s12200-012-0289-3

RESEARCH ARTICLE

Proposal for modeling of tapered quantum-dot semiconductor optical amplifiers

Ehsan MOHADESRAD, Kambiz ABEDI(

)

Department of Electrical Engineering, Faculty of Electrical and Computer Engineering, Shahid Beheshti University, Tehran 1983963113, Iran

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Abstract

To compensate for the loss of carrier density along the active region of quantum-dot semiconductor optical amplifiers (QD-SOAs), tapered structure of the waveguide is introduced. In this paper, a method for theoretically modeling of such devices is proposed, and according to that model different shapes of tapered waveguides are studied. This study is pivoted around the optical gain and cross-gain modulation (XGM) of the QD-SOA under investigation to show how altering the shape of the waveguide affects the main characteristics of the device. For doing so, the rate equation model has been employed and solved through finite difference method and MATLAB ODE. Through this, as long as monotonically increasing profiles for the width of the waveguide are used, the shape of the waveguide has a negligible effect on the gain which mainly depends on the width ratio of the waveguide output to its input. However, this carrier compensation has adverse effect on the XGM, where its efficiency rely on how the pump signal can effectively reduce carrier density and upset the gain.

Keywords tapered waveguide cross-gain modulation (XGM) quantum-dot (QD) semiconductor optical amplifier (SOA)

Corresponding Author(s): ABEDI Kambiz,Email:K_Abedi@sbu.ac.ir

Issue Date: 05 December 2012

Cite this article:

Ehsan MOHADESRAD,Kambiz ABEDI. Proposal for modeling of tapered quantum-dot semiconductor optical amplifiers[J]. Front Optoelec, 2012, 5(4): 457-464.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-012-0289-3
https://academic.hep.com.cn/foe/EN/Y2012/V5/I4/457

Fig.1 Schematic diagram of QD-SOA

Fig.2 Energy band diagram of one layer of QDs schematically depicting energy gaps between CB and VB states []

Tab.1 Physical parameters of QD-SOA under investigation []

Fig.3 Schematic of QD-SOA, comprised of extremely short sections

Fig.4 (Color online) (a) Conventional straight waveguide structure; (b) tapered waveguide structure

Fig.5 (Color online) (a) Exaggerated tapered structure; (b) tapered structure modeled as conventional QD-SOA with increasing QD density

Fig.6 (Color online) Schematic diagram of QD-SOA with coupling device to back to initial width

Tab.2 Shapes of tapered wave-guide

Fig.7 (Color online) Tapered QD-SOA modal gain for different width ratios at the end of device

Fig.8 (Color online) Tapered QD-SOA output signals photon densities for different width ratios at the end of device

Fig.9 (Color online) Tapered QD-SOA modal gain for different shapes of waveguide with width ratio of 2 and 10 at the end of device

Fig.10 (Color online) XGM efficiency (a) and normalized XGM efficiency (b)

1	Rostami A, Baghban H, Maram R. Nanostructure Semiconductor Optical Amplifiers: Building Blocks for All-Optical Processing. New York: Springer Heidelberg, 2011
2	Akiyama T, Sugawara M, Arakawa Y. Quantum-dot semiconductor optical amplifiers. Proceedings of the IEEE , 2007, 95(9): 1757-1766 doi: 10.1109/JPROC.2007.900899
3	Bilenca A, Eisenstein G. On the noise properties of linear and nonlinear quantum-dot semiconductor optical amplifiers: the impact of inhomogeneously broadened gain and fast carrier dynamics. IEEE Journal of Quantum Electronics , 2004, 40(6): 690-702 doi: 10.1109/JQE.2004.828260
4	Akiyama T, Hatori N, Nakata Y, Ebe H, Sugawara M. Pattern-effect-free semiconductor optical amplifier achieved using quantum dots. Electronics Letters , 2002, 38(19): 1139-1140 doi: 10.1049/el:20020716
5	Connelly M J. Semiconductor Optical Amplifiers. Boston: Kluwer Academic Publishers, 2002
6	Ghafouri-Shiraz H. The Principles of Semiconductor Laser Diodes and Amplifiers: Analysis and Transmission Line Laser Modeling. London: Imperial College Press, 2004
7	Qasaimeh O. Effect of doping on the optical characteristics of quantum-dot semiconductor optical amplifiers. Lightwave Technology Journalism , 2009, 27(12): 1978-1984
8	Taleb H, Abedi K, Golmohammadi S. Operation of quantum-dot semiconductor optical amplifiers under nonuniform current injection. Applied Optics , 2011, 50(5): 608-617 doi: 10.1364/AO.50.000608 pmid:21343980
9	Yi Y, Lirong H, Meng X, Peng T, Dexiu H. Enhancement of gain recovery rate and cross-gain modulation bandwidth using a two-electrode quantum-dot semiconductor optical amplifier. Journal of the Optical Society of America B, Optical Physics , 2010, 27(11): 2211-2217 doi: 10.1364/JOSAB.27.002211
10	Carney K, Latkowski S, Maldonado-Basilio R, Landais P, Lennox R, Bradley A L. Characterization of a multi-electrode bulk-SOA for low NF in-line amplification in passive optical networks. In: Proceedings of the 12th International Conference on Transparent Optical Networks (ICTON) , 2010, 1-4
11	Fiore A, Markus A. Differential gain and gain compression in quantum-dot lasers. IEEE Journal of Quantum Electronics, 2007, 43(4): 287-294 doi:10.1109/JQE.2006.890399
12	Qasaimeh O R. Ultra-fast gain recovery and compression due to auger-assisted relaxation in quantum dot semiconductor optical amplifiers. Lightwave Technology Journalism , 2009, 27(13): 2530-2536
13	Kim J, Meuer C, Bimberg D, Eisenstein G. Effect of inhomogeneous broadening on gain and phase recovery of quantum-dot semiconductor optical amplifiers. IEEE Journal of Quantum Electronics , 2010, 46(11): 1670-1680 doi: 10.1109/JQE.2010.2058793
14	Xiao J L, Yang Y D, Huang Y Z. Investigation of gain recovery for InAs/GaAs quantum dot semiconductor optical amplifiers by rate equation simulation. Optical and Quantum Electronics , 2009, 41(8): 613-626 doi: 10.1007/s11082-010-9368-0
15	Bendelli G, Komori K, Arai S. Gain saturation and propagation characteristics of index-guided tapered-waveguide traveling-wave semiconductor laser amplifiers (TTW-SLAs). IEEE Journal of Quantum Electronics , 1992, 28(2): 447-458 doi: 10.1109/3.123272

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