Dr. Muhammad Talal Ali Khan Profile

Dr. Muhammad Talal Ali Khan

SPIE Involvement:

Author

Area of Expertise:

Integrated Devices , Topological Photonics , Optical communication , 3D Printing , THz spectroscopy , Terahertz Waveguides and fiber

Websites:

Company Website

Muhammad Talal Ali Khan is a Ph.D. Researcher in Photonics & Optical Communication Group (POCG) and THz Photonics Group at the University of New South Wales, Sydney, Australia in the school of electrical engineering and telecommunication on University International Postgraduate (UIP) and 2019 SPIE Optics and Photonics Education scholarship awards. Previously, he has completed a master's degree from KFUPM, Saudi Arabia, and an Undergraduate degree from COMSATS, Pakistan in 2017 and 2009, respectively both in electrical engineering. He has published more than 30 technical papers including Journals, conferences, and a book chapter.

Proceedings Article | 31 May 2022 Presentation + Paper

Terahertz waveguide: the fundamental component for sustainable world connectivity

Shaghik Atakaramians, Haisu Li, Muhammad T. A. Khan, Qigejian Wang, Syed Daniyal A. Shah, Rajour T. Ako, Madhu Bhaskaran, Sharath Sriram, Withawat Withayachumnankul, Andrea Blanco-Redondo, Boris Kuhlmey

Proceedings Volume 12134, 1213409 (2022) https://doi.org/10.1117/12.2625233

KEYWORDS: Waveguides, Terahertz radiation, Photonic crystals, Wave propagation, Radio propagation, Dispersion, Photonics, Silicon, Silicon photonics, Physics

Read Abstract +

Proceedings Article | 30 December 2019 Paper

NIR performance comparison of Bi/Er and Yb/Er co-doped fibres as pumped at 808 nm and 830 nm

Muhammad Talal A. Khan, Shuen Wei, Gang-Ding Peng

Proceedings Volume 11200, 112002P (2019) https://doi.org/10.1117/12.2539567

KEYWORDS: Erbium, Luminescence, Bismuth, Absorption, Ytterbium, Near infrared, Optical amplifiers, Telecommunications, Silica, Semiconductor lasers

Read Abstract +

State-of-the-art optical fiber communication system reaches to transmission capacity from tens to hundreds of Tb/s. The massive capacity crunch has sparked concerns regarding available bandwidth and constantly increasing optical data traffic. Certainly, one way is to broaden the spectral transmission range beyond the narrow gain band of current erbium doped fiber amplifier (EDFA). Either side of Erbium across low-loss transmission window (1.5μm) shown promising results with optical fibres codoped with rare-earth-doped materials such as bismuth/thulium. Hence, it is of crucial importance to develop broadband optical amplifier to fully utilize the uncovered spectral regions with proper choice of pump wavelength(s)/Laser diodes. Here we have compared the performances of Bismuth/Erbium and Ytterbium/Erbium co-doped fibres as pumped to 808nm to one as pumped at 830nm. The pumping excitation conditions and spectral characteristics in BEDF and EYDF are explored to maximize the lasing efficiency. Using equivalent conditions and same section of Bi/Er codoped fiber, an enhanced broadband emission with FWHM ~ 149 nm is observed in Bi active centers (BAC) related to Si around ~1420nm under 808nm excitation as compared to 830nm with its FWHM ~ 125nm at an input power of ~ 55.5 mW. At maximum power, under 808nm pumping, a well-known peak emission of Er³⁺ at 1536nm noticeably increased due to reabsorption of BAC-Si (~1420nn) with the ratio ~ 1.7 between Er³⁺ and BAC-Si emission peaks. On the contrary, emission peak of the BAC-Si revealed higher with the ratio of ~ 1.5 than that of Er³⁺ by 830nm pumping. Afterward, we observed Yb³⁺ emission at 1040nm and 980 nm using Yb/Er codoped fiber with both pumps at same power. Using 808nm pumping, an extended emission band around ~ 1230 nm appeared namely BAC-Al while the other emission bands associated with BAC-Si (~ 1480nm) and Er³⁺ (~1536nm) shown similar emission bands with high emission peaks compared to 830nm pump at equivalent pump powers. Furthermore, the emission peak of the BAC-Si is about the same level as that of Er³⁺ with ratio of RBi/Er~ 1.1 under 808nm pumping while 830 nm pump showed the ~ 5.25 ratio between the emission peaks of BAC-Si and Er³⁺. We believe that this side-by-side comparison of two pumps and two home-made fabricated codoped fibres could be useful as a promising strategy for the next-generation WDM passive optical networks employing single broadband amplifier and tunable fiber laser covering 1000-1800nm telecommunication bands.

Proceedings Article | 9 November 2018 Paper

Sparse adaptive filter estimation/equalization comparison for underwater acoustic communication

M. T. A. Khan, B. Maqsood, Z. Ishaq

Proceedings Volume 10826, 108260G (2018) https://doi.org/10.1117/12.2501318

KEYWORDS: Acoustics, Signal to noise ratio, Digital filtering, Wireless communications, Telecommunications, Electrical engineering, RF communications

Read Abstract +

Proceedings Article | 4 May 2018 Paper

Tunable Vivaldi antenna design for frequency scanning

U. Tayyab, M. T. Khan, H. Shahid, M. Tilal, E. Alkhazraji, Z. Ishaq, B. Maqsood

Proceedings Volume 10633, 1063312 (2018) https://doi.org/10.1117/12.2303908

KEYWORDS: Antennas, Magnetism, Electrical engineering, Internet, Polarization, Waveguides, Electronics engineering, Information technology, Video, Televisions

Read Abstract +

Proceedings Article | 1 May 2017 Paper

RFID antenna design for circular polarization in UHF band

Hamza Shahid, Muhammad Talal Ali Khan, Umais Tayyab, Usama Bin Irshad, Emad Alkhazraji, Muhammad Sharjeel Javaid

Proceedings Volume 10188, 101880K (2017) https://doi.org/10.1117/12.2264040

KEYWORDS: Circular polarizers, Minerals, Alternate lighting of surfaces, Electrical engineering, Electronics engineering, Antennas, UHF band, Dielectric polarization, Defense and security, Aerospace engineering, Dielectrics

Read Abstract +

Course Instructor

NON-SPIE: ELEC4122: Strategic Leadership and Ethics

Tutoring

Expand Description +

Keywords/Phrases

Search In:

Publication Years