NDLI: Few-optical-cycle pulses in the near- and mid-infrared by optical parametric amplifiers

Content Provider	IEEE Xplore Digital Library
Author	Brida, D. Manzoni, C. Cirmi, G. Marangoni, M. Bonora, S. Villoresi, P. Cerullo, G. De Silvestri, S.
Copyright Year	2009
Description	Author affiliation: National Laboratory for Ultrafast and Ultraintense Optical Science - CNR-INFM, Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci 32, 20133, Italy (Brida, D.; Manzoni, C.; Cirmi, G.; Marangoni, M.; Bonora, S.; Cerullo, G.; De Silvestri, S.) \|\| Laboratory for Ultraviolet and X-Rays Optical Research-CNR-INFM, D.E.I.-Università di Padova, Italy (Villoresi, P.)
Abstract	The generation of light pulses with duration down to a few optical cycles is a major topic in ultrafast optics. The broad gain bandwidths of optical parametric amplifiers (OPAs) have been so far widely exploited for few-cycle pulse generation in the visible, while only limited work has been performed in the near- and mid-infrared spectral region. Near-IR short pulses are interesting for ultrafast spectroscopy as well as for high-harmonic generation and attosecond pulse synthesis, taking advantage of the extended energy cutoff afforded by the longer driving wavelength. The mid-IR spectral range (3–5 µm) overlaps with vibrational transitions of many molecular and solid-state systems, allowing measurement of vibrational dephasing and coherent control of chemical reactions. The OPA phase-matching bandwidth Δω depends on the group-velocity mismatch between signal and idler δsi=1/νgs−1/νgi, where ν;gs and νgi are the signal and idler group velocities respectively. To the first order one can write Δω∝1/δsi, so that broadband gain is achieved when the group velocities of signal and idler are matched. This condition can occur in the following OPA schemes: (a) in a non-collinear OPA (NOPA), in which the projection of the idler group velocity along the signal direction is equal to the signal group velocity; (b) at degeneracy point ωs= ωi; (c) at some particular frequencies (ωs≠ωi)out of degeneracy. The characteristics of the non-linear materials are crucial to determine OPA scheme and phase-matching bandwidth [1].
Starting Page	1
Ending Page	1
File Size	105858
Page Count	1
File Format	PDF
ISBN	9781424440795
DOI	10.1109/CLEOE-EQEC.2009.5196379
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-14
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Semiconductor optical amplifiers Stimulated emission Pulse amplifiers Optical pumping Laser excitation Optical amplifiers Ultrafast optics Nonlinear optics Optical pulse generation Optical pulses
Content Type	Text
Resource Type	Article

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