Abdullah Rahnama

Roles and responsibilities

Researcher with hands-on experience in experimental photonics, automation, and material characterization with focus on the design, fabrication, and testing of fiber optic components.

Current research and/or projects

My current research involves design, fabrication, and characterization of Bragg grating based devices in optical fibres and glasses.

Research and/or project statements

Our research harness the application of novel femtosecond laser processing technology towards advancing capabilities in the fabrication of various photonics devices inside optical fibers and different glasses.




  • Ph.D. Electrical and Computer Engineering, University of Toronto, 2018-2022
  • M.Sc. Physics, University of Waterloo, 2016-2018
  • B.Sc. Physics, Sharif University of Technology, 2011-2016


  • Optics and Photonics Education Scholarship, SPIE, 2021
  • Best Student Paper Award, Photonics West, SPIE (2nd place) 2021
  • Edward S. Rogers Sr. Graduate Fellowship, 2018-22
  • Optica Travel grant for “Siegman Int. Summer School on Lasers”, Optica, 2018
  • Marie Curie Graduate Student Award, Dept. of Physics, University of Waterloo, 2016-18
  • Graduate Experience Awards, Dept. of Physics, University of Waterloo, 2017-18
  • Science Graduate Student Award, Faculty of Science University of Waterloo, 2016-17
  • International Master's Student Award, University of Waterloo, 2016-18

Key publications

  1. A. Rahnama, M. Mahlooji, G. Djogo, F. Azhari, P. R. Herman "Off-Axis Filament Based Fiber Bragg Gratings for Azimuthally Resolved Displacement Sensing" Optics Express, 30(3), 4189, 2022. 
  2. K. M. Aghdami*, A. Rahnama*, E. Ertorer and P. R. Herman "Laser Nano-Filament Explosion for Enabling Open-Grating Sensing in Optical Fibre," Nature Communications, 12, 6344, 2021 (*Equal Contribution). 
  3. A. Rahnama, T. Dadalyan, K. M. Aghdami, T. Galstian, P. R. Herman "In-Fibre Switchable Polarization Filter Based on Liquid Crystal Filled Hollow-Filament Bragg Gratings" Advanced Optical Materials, 19(9), 2100054, 2021. 
  4. A. Rahnama, K. M. Aghdami, Y. H. Kim, P. R. Herman "Ultra‐Compact Lens‐Less “Spectrometer‐in‐Fiber” Based on Chirped Filament‐Array Gratings" Advanced Photonics Research, 1(2), 2000026, 2020. (Featured on the Front Cover) 
Abdullah Rahnama

Abdullah Rahnama

Assistant Research Officer
Quantum and Nanotechnologies
100 Sussex Drive
Ottawa, Ontario K1A 0R6
Preferred language: English
Other(s): English

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Quantum, Advanced photonics sensing, Optical fibre lasers and sensors, Sciences, Physical sciences, Physics