Worked on channel modeling for atmospheric optical beam propagation and proposed a dynamic FSO link design as mitigation technique. Also demonstrated the phenomenon of optical beam propagation under controlled channel environment for Free Space Optical communication links.

Publications:Abdullah Nafis Khan, and Usman Younis. "High-Q mid-infrared 1D photonic crystal waveguide resonator in SOI." Integrated Optics: Design, Devices, Systems, and Applications V. Vol. 11031. International Society for Optics and Photonics, 2019.

o Monitoring LDI network elements, traffic graphs, statistical reports through Odine, EMS, RSM, CMS & NMS.o Providing technical support to Optix customers and FLL clients.o Configuring new numbers for POTS/PRI over C5 switch for new deployment of Optix/FLL customers.o Reporting i.e. network utilization, traffic record, routing management, port graphs & shift reports via Microsofttools.o Commissioning of SIP and TDM Interconnects with LDI operators and VoIP aggregators.o Implementation of Protocols: SIP, H323, SS7, MGCP and SIGTRAN.o Hands on experience with C4 & C5 Soft-Switches (Genband Nextone & TELES NGN).o Provisioning routes on Nextone MSX/SBC and in case of network failure taking corrective & preventive measureslike rerouting, blocking and issue escalation.o QoS maintenance of VoIP Network KPIs (ASR, ACD, PDD & NER).o Monitoring and troubleshooting issues related to Media Gateways/POPs within LDI Network.o Coordinating with On-Field Operations teams for network related issues.o Collaboration with IP Core, Transmission and LDI Operators for routine operations and to troubleshoot issues.o Coordinating with Billing and International Business Teams for commissioning/modifying and blocking/unblockinginterconnects.o Corrective & preventive maintenance of collocation/services & operations.o Coordinate with vendor support in case of system level issues.

Research Publication• Research publication "Propagation Loss Analysis of Ion Implantation Induced Quantum Well Intermixed GaAs/AlGaAs Waveguides." Chinese Journal of Physics 53.5 (2015): 100501-1.• Research publication "Continuous-wave room-temperature laser action in GaAs/AlGaAs superlattices," in Advanced Solid State Lasers, OSA Technical Digest (online) (Optical Society of America, 2014), paper ATu2A.48.• Poster presentation at “International Symposium on Emerging Technologies in Optical Communications and Semiconductor Devices-2014” held in NUST. • Research paper “Virtualization - A Survey” published in Vol-1 of Journal of Transactions on Networks and Communications, United Kingdom 2013.Master Thesis •Propagation loss analysis in Optical Bragg grating waveguides: As a light wave enters a waveguide different losses are introduced while it propagates. The mode of waveguide changes when the dimensions of the waveguide are changed, due to which the propagation loses are varied. In addition to this, if Bragg gratings are incorporated in the optical waveguides, the Bragg losses will contribute in the overall propagation losses. In this thesis, general mechanism for evaluating the propagation losses, including Bragg losses, in an optical waveguide is being developed. This shall be applicable when guided modes of different polarizations are introduced in a waveguide.Semester Research Papers• “Cooperative Wireless Communication”

o Troubleshooting of ALCATEL BTSA9100 GSM900 and DCS1800 Cabinets issueso Performing Abis Loop / Break Activityo Providing Level – I maintenance to the Mobilink which includes the troubleshooting and replacement of the faulty TREs, Combiners and the Suma Card

o ONUo Broadband deploymento IP classification and Modem Configuration