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  • Sharma, Varun; Kumar, S. Chaitanya; Samanta, G. K.; Ebrahim-Zadeh, M. (Optical Society of America, 2020-07)
    Structured beams, conventionally generated through the spatial mode conversion of the Gaussian laser beams, have attracted great interest in recent years. Optical parametric oscillators (OPOs) have demonstrated the potential ...
  • Sharma, Varun; Suddapalli, Chaitanya Kumar; Samanta, Goutam Kumar; Ebrahim-Zadeh, M. (Optical Society of America, 2018-06)
  • Sharma, Varun; Samanta, G. K.; Chaitanya Kumar, S.; Singh, R. P.; Ebrahim-Zadeh, M. (Optical Society of America, 2019-10)
    We report a continuous-wave (cw) optical parametric oscillator (OPO) generating optical vortices tunable in the ultraviolet (UV). Based on MgO:sPPLT as the nonlinear crystal, the singly resonant OPO is pumped by a cw vortex ...
  • Sharma, Varun; Chaitanya Kumar, S.; Aadhi, A.; Ye, H.; Samanta, Goutam Kumar; Ebrahim-Zadeh, M. (Springer Nature Publishing, 2019-07)
    Vector-vortex beams, having both phase and polarization singularities, are of great interest for a variety of applications. Generally, such beams are produced through systematic control of phase and polarization of the ...
  • Apurv Chaitanya, N.; Chaitanya Kumar, S.; Aadhi, A.; Samanta, Goutam Kumar; Ebrahim-Zadeh, M. (Nature Publishing Group, 2016-08)
    We report on the first realization of an ultrafast Airy beam optical parametric oscillator (OPO). By introducing intracavity cubic phase modulation to the resonant Gaussian signal in a synchronously-pumped singly-resonant ...
  • Apurv Chaitanya, N.; Devi, Kavita; Samanta, Goutam Kumar; Ebrahim-Zadeh, M.; Suddapalli, Chaitanya Kumar D. (OSA Publishing, 2016-01)
    We report on the generation of ultrafast vortex beams in the deep ultraviolet (DUV) wavelength range at 266 nm, for the first time to our knowledge. Using a Yb-fiber-based green source in combination with two spiral phase ...

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