623 citations · 1.3k across the 18 of their papers we have counts for
18 papers
Highly efficient narrowband terahertz generation driven by a two-spectral-line laser in PPLN
H. T. Olgun, W. Tian, G. Cirmi +7
We demonstrate record conversion efficiencies of up to 0.9 percent for narrowband (1 percent relative bandwidth) THz generation by strongly-cascaded difference frequency generation…
Raman Shifting induced by Cascaded Quadratic Nonlinearities for Terahertz Generation
Koustuban Ravi, Franz X. Kärtner
We introduce a new regime of cascaded quadratic nonlinearities which result in a continuous red shift of the optical pump, analogous to a Raman shifting process rather than self-ph…
Terahertz-induced cascaded interactions between spectra offset by large frequencies
Koustuban Ravi, Franz X. Kärtner
We explore the dynamics of a system where input spectra in the optical domain with very disparate center frequencies are strongly coupled via highly phase-matched, cascaded second-…
Analysis of terahertz generation using tilted-pulse-fronts
Koustuban Ravi, Franz X. Kärtner
A 2-D spatio-temporal analysis of terahertz generation by optical rectification of tilted-pulse-fronts is presented. Closed form expressions of terahertz transients and spectra in…
Terahertz generation by beamlet superposition
Koustuban Ravi, Benjamin Ofori-Okai, Keith A. Nelson +1
We analytically show how a superposition of beamlets produces terahertz radiation with greater spatial homogeneity and efficiency compared to tilted-pulse-fronts generated by diffr…
High Efficiency Terahertz Generation in a Multi-Stage System
Lu Wang, Arya Fallahi, Koustuban Ravi +1
We describe a robust system for laser-driven narrowband terahertz generation with high conversion efficiency in periodically poled Lithium Niobate (PPLN). In the multi-stage terahe…