Pachava Srinivas - Education & Research

Education background

Sept 2019 - Jan 2020, Post Doctoral fellow at Ben-Gurion University of Negev, Israel
June 2019 - Oct 2019, Pre-Post Doctoral fellow in Electrical Engineering, IIT Madras
July 2014 - May 2019, Dual degree (MS+PhD) degree in Electrical Engineering, IIT Madras, CGPA: 9/10
July 2009 - June 2013, Bachelors of Technology, GDLV affiliated to Jawaharlal Nehru Technological University, Kakinada. Percentage: 82.6%
June 2007 – June 2009, Board of Intermediate Education, Andhra Pradesh (AP), Percentage: 94.4%
June 2006 - June 2007, Board of Secondary Education, AP, percentage: 93.5%

PhD Research:

Investigation of Higher Order Mode Amplification in Optical Fibres

Lasers with high output power have potential applications in material processing, remote sensing, military, fundamental science. High power fiber lasers and amplifiers have been extensively studied in the past few decades and a phenomenal increase in the peak (MW) as well as average power levels (kW) have been demonstrated. However, the power scaling of such fiber lasers are limited by several factors including fiber non-linear effects and thermal mode instability. Using higher order modes (HOMs) in a fiber which exhibit large effective modal area is a possible solution for addressing the above limitations.

Truncated vector beam propagation

Research highlights:

· Generation of fractional charge vortex beams using spiral phase plate and their decomposition into integral charge vortex beams.

· Generation of vortex beams in ring core fiber using fused mode selective coupler.

· Generation of higher order vector vortex beams and their propagation in free-space.

· Single shot modal decomposition of beams from a few mode fiber in integral charge vortex basis using spatial correlation technique.

. Amplification of vortex beams in optical fiber.

A short video on my work (click here)

Generation, propagation and amplification of orbital angular momentum beam in optical fiber.mp4

Education background

PhD Research:

Research highlights:

Wavefronts of vortex beams for topological charges -3 to +3