• Instrumental in setting up a new ultrafast photonics laboratory (including fsec, psec, and nsec lasers) for laser indcued breakdown spectroscopy (LIBS), coherent Anti-Stokes Raman scattering (CARS) studies, Ultrafast time-resolved techniques, Terahertz spectroscopic studies, SERS studies for detection of explosives etc.
• Studies of short pulse interaction with materials including femtosecond ablation
• Femtosecond direct writing for integrating optics and fluidics structures.

Assistant Professor, Indian Institute of Technology Guwahati, Guwahati, India (December 2004 – May 2007)

• Involved in setting up a Nonlinear Optics and Photonics laboratory at IIT Guwahati. Fabrication and characterization of micro- and nano-photonic structures in different materials were carried out.

Research Fellow, National University of Singapore, Singapore (July 2003 – December 2004)

• Instrumental in setting up a new characterization facility at Centre for Ion Beam Applications, Physics Department, to investigate the linear and nonlinear optical properties of photonic components fabricated using focused high-energy Proton Beam
• Mode profiling, Refractive index profiling, Propagation loss measurements in passive waveguides of PMMA, SU8, Silicon, and Erbium-doped phosphate glass
• Frequency conversion in waveguides fabricated in NLO crystals.
• Nonlinear(Active) waveguides, Micro-cavity lasers: fabrication and characterization

Research Assistant, University of St. Andrews, UK (August 2000 – June 2003)

• Major contribution for the development of semiconductor nonlinear optics laboratory at University of St. Andrews
• Practical experience and knowledge of building and characterizing Ti:sapphire laser and optical parametric oscillators (psec and fsec)
• Extensive experience with nonlinear frequency conversion techniques like SHG, DFG, and SFG in semiconductor nonlinear waveguides and crystals using femtosecond and picosecond pulses
• Instrumental in developing a novel setup for the loss measurements in semiconductor waveguides using the femtosecond scattering technique in the near-IR wavelengths. Sound knowledge of the cw Fabry-Perot technique for loss measurements in waveguides.
• Knowledge of Birefringent Phase Matching, Quasi Phase Matching, and Modal Phase Matching in semiconductor nonlinear waveguides
• Expertise with light coupling (pig-tail/fiber) in and out of semiconductor and polymer waveguides
• Familiarity with intensity/interferometric autocorrelation of femtosecond pulses
• Familiarity with near- and mid-IR optics, detectors

Research Student, University of Hyderabad, India (August 1994 – April 2000)

• Evaluation of ps/fs excited state dynamics in C60, porphyrins and phthalocyanines using incoherent light from a broadband nsec dye laser using degenerate four wave mixing (DFWM)
• 3rd order nonlinearity measurements using DFWM & Z-scan techniques with nsec/psec/fsec pulses
• Led an effort to characterize various organic nonlinear materials for optical limiting and NLO applications
• Involved with the EFISHG set up for characterization of second order NLO materials