RESEARCH AREAS

ADVANCE OPTICAL COMMUNICATION RESEARCH GROUP
The Advance Optical Communication Group (AOCG) of UET TAXILA is actively involved in novel research, educational and consulting activities in the broader field of optical communications covering aspects related with optical transport solutions and network design in optical access, metro and core segments & their securities. Its mission is to perform research on technologies, algorithms, protocols, architectures and transport schemes for analyzing & designing high-speed optical communication systems and networks and also to spread this knowledge in the industrial and educational community.

Research Areas:

• Optical Communication
• Advance Modulation Formats
• Free Space Optics
• Chaotic Communication
• Optical Amplifiers
• Optical Fiber Design
• Passive Optical Networks
• WDM & DWDM
• Radio Over Fiber

Research Group Members:
Academic Staff
• Engr. Mohsin Niaz
• Engr.Lubna Nadeem
• Engr. Dr. Ali Waqar Azim

Research Students
MSc/PhD Alumni students
• Engr. Danish Ali Mazhar (11-PHD-TE-02)
• Engr.Saleha Maqsood (14F-MS-TE-08)
• Engr.Umair Yasir (14F-MS-TE-06)
• Engr. Sabeeh Ahmed (15F-MS-TE-10)
• Engr. Asad Ur Rehman (14P-MS-TE-01)
• Engr. Adnan Qayyum (14-MS-TE-03)
• Engr. Zeeshan Arshad (15-MS-TE-13)

Available Tools For Research:
Optisystem 7.0, 13.0, 14.0
OptiSystem is an optical communication system simulation package for the design, testing, and optimization of virtually any type of optical link in the physical layer of a broad spectrum of optical networks, from analog video broadcasting systems to intercontinental backbones. A system level simulator based on the realistic modeling of fiber-optic communication systems, OptiSystem possesses a powerful simulation environment and a truly hierarchical definition of components and systems. Its capabilities can be easily expanded with the addition of user components and seamless interfaces to a range of widely used tools.

OptiFDTD
OptiFDTD is a powerful, highly integrated, and user friendly CAD environment that enables the design and simulation of advanced passive and non-linear photonic components.

Matlab
While dealing with optics, Matlab is very powerful tool that can be used in performing signal processing as well as for analyzing wave propagation in different waveguides. Also modeling of optically amplified fiber communications systems can be done using Simulink. Furthermore it is being used to study & implement the optical concepts and interpretation, mathematical procedures, and engineering applications, shedding light on device behavior and dynamics through statistics modeling.

On-going Projects:
1. Analysis of optical network architectures using advanced modulation formats for data centers.
2. Long Reach WDM/TDM PON using OFDM and reliable link.
3. Performance Analysis of Modulation Formats for Next Generation Passive Optical Networks.
4. DWDM Chaotic Communication.
5. Chaotic Communication for Advance Modulation Formats.
6. Radio Over Fiber

Publications:

• E. Tipsuwannakul, M. N. Chughtai, M. Forzati, J. Mårtensson, P. Andrekson, and M. Karlsson, “Influence of self- and cross-phase modulation on 40 Gbaud dual polarization DQPSK/D8PSK signals in 10 Gbit/s OOK WDM systems,” Opt. Express, vol. 18, no. 23, pp. 24178–24188, Nov. 2010.
• M. N. Chughtai, M. Forzati, J. Mårtensson, and D. Rafique, “Influence of polarization state, baud rate and PMD on non-linear impairments in WDM systems with mixed PM (D)QPSK and OOK channels,” OpticsExpress,vol.20,no.7,pp.8155-8160,Mar.2012.
• D. Rafique, M. Mussolin, M. Forzati, J. Mårtensson, M. N. Chugtai, and A. D. Ellis, “Compensation of intra-channel nonlinear fibre impairments using simplified digital back-propagation algorithm,” Opt. Express, vol. 19, no. 10, pp. 9453–9460, May 2011.
• Jiajia Chen, L. Wosinska, M. N. Chughtai, and M. Forzati, “Scalable Passive Optical Network Architecture for Reliable Service Delivery,” IEEE/OSA Journal of Optical Communications and Networking, vol. 3, no. 8, pp. 667–673, Aug. 2011.
• M. N. Chughtai and L. Beygi, “Optimization of 16-QAM constellation in the presence of nonlinear phase noise,” in Proceedings of the 7th International Conference on Frontiers of Information Technology, Abbotabad, Pakistan, 2009, pp. 62:1–62:3.
• M. N. Chughtai, M. Forzati, J. Mårtensson, E. Tipsuwannakul, and M. Karlsson, “Analysis of non-linear impairments in 40 Gbaud PM DQPSK and D8PSK transmission,” in 2010 12th International Conference on Transparent Optical Networks (ICTON), Munich Germany, 2010, pp. 1–4.
• M. N. Chughtai, M. Forzati, J. Martensson, and D. Rafique, “Dependence of non-linear impairments on polarization state and baud rate in WDM systems with mixed DQPSK and OOK channels,” in 2011 13th International Conference on Transparent Optical Networks (ICTON), Stockholm Sweden, 2011, pp. 1-4.
• D. Rafique, M. Mussolin, M. Forzati, J. Martensson, M. N. Chughtai, and A. D. Ellis, “Modified split-step fourier method for compensation of nonlinear fibre impairments,” in 2011 13th International Conference on Transparent Optical Networks (ICTON), Stockholm Sweden, 2011, pp.1-4.
  
  Awards:
  
• Winner of best poster paper award in 7th international conference on Frontiers of information technology Dec 19-21 2009 Pakistan.