73 research outputs found
Designing broadband fiber optic parametric amplifier based on near-zero single ZDW PCF with ultra-flat nature
No full textBroadband mid-infrared generation by difference-frequency generation in strongly dispersive Bragg reflection waveguides
No full text
Nonlinear Optical Absorption Properties of Sputtered WSe2 Thin-films in the Near-Infrared Spectral Band
No full text541-545We present a detailed investigation on the intensity dependent third-order nonlinear optical (NLO) properties of RFsputtered
WSe2 thin film using ultra short pulses. The investigation employed a single-beam Z-scan technique using nearinfrared
(NIR) ultra short pulses centered at 1030 nm for ascertaining the NLO response. The results reveal a reverse
saturable absorption (RSA) signature, which is primarily due to the contribution from two-photon absorption (TPA). We
explored the impact of high optical fluence on the TPA process and observed the weakening of the nonlinear optical
absorption in WSe2 thin film, which essentially pointed towards a significant contribution of free-carriers as well as bandfilling
effect. This research elucidates the insight of photophysical properties of WSe2 thin films and shows the potential use
as optical limiters
SG_Mutual_Beam_Pump_Power.mp4
No full textThe video displays the evolution of a mutual beam comprised of signal and idler as a function of incident pump power in an MgO-doped PPLN based optical parametric generation experiment. Here, the pump is an 400 femtosecond ultrashort pulse being incident on the MgO-doped PPLN crystal at a repetition rate of1 MHz and spatial beam waist of 220 micron
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