Journal
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
Volume 10, Issue 5, Pages 1171-1179Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2004.837205
Keywords
phase-matched difference-frequency generation (DFG); single-cycle terahertz pulses; ultrawideband millimeter-wave pulses
Ask authors/readers for more resources
Consider a second-order nonlinear medium in which perfect phase-matching can be achieved at one particular output wavelength for the process of the terahertz generation from a train of ultrafast laser pulses based on difference-frequency generation. We assume that the coherence lengths for the terahertz generation are sufficiently long within a wide bandwidth around this perfect phase-matching wavelength due to a slight dispersion in the terahertz region (i.e., broadband phase-matching). In this theoretical work, we show that quasi-single-cycle terahertz pulses can be efficiently generated. An efficient conversion for the terahertz generation is made possible not only by utilizing the broadband phase-matching but also by optimizing the pulse width for each peak terahertz frequency. We have investigated the regime of the strong pump depletion and found the limits to the conversion efficiencies. We have ruled out the significant contributions due to the effects of multiphoton absorption, free-carrier absorption, and nonlinear refractive indices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available