Speaker: Dr Roopa Prakash, Marie Skłodowska-Curie Postdoctoral Fellow, CNRS, 
         Institut d’Optique Graduate School, France.

Title: "Enabling Diversity in Fiber Laser Systems through Power, Coherence, and Spectral Control"

Date: Wednesday, 6th May 2026 - Time: 4 PM

Venue: CeNSE Seminar Hall

Abstract:

Fiber lasers provide a versatile platform for generating optical sources with diverse 
performance characteristics. However, achieving simultaneous control over power, coherence, 
and spectral bandwidth remains challenging due to nonlinear effects, thermal constraints, 
gain limitations, and noise transfer mechanisms. In this talk, I present a unified approach to 
systematically engineer these key parameters through my work on high-power fiber lasers, 
ultra-coherent single-frequency and Brillouin lasers, and spectrally engineered broadband sources. 
I will discuss the strategies used for mitigating stimulated Brillouin scattering, suppressing noise, 
and extending wavelength access beyond conventional gain bands. Together, these results establish a 
framework for designing next-generation fiber laser systems for emerging industrial and scientific 
applications.


Biography:

Dr. Roopa Prakash is a Marie Skłodowska-Curie Postdoctoral Fellow at the LP2N laboratory 
(CNRS, Institut d’Optique Graduate School, University of Bordeaux), France. Her research focuses on 
the development of high-power, single-frequency fiber lasers based on rare-earth-doped platforms for 
precision photonics and quantum technologies. She received her PhD from the Centre for Nano Science 
and Engineering (CeNSE) at the Indian Institute of Science (IISc), Bangalore, in 2021, where she 
worked on nonlinear fiber optics and advanced laser systems, including supercontinuum, 
optical frequency combs, Raman lasers and high-power fiber lasers. Her work includes key 
contributions to stimulated Brillouin scattering suppression for kW-class power scaling and 
the development of ultra-coherent fiber lasers using custom fibers.


Host Faculty:  Prof. Supradeepa V.R.