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Proceedings Paper

Efficient cascaded half-harmonic generation of mid-IR frequency combs (Conference Presentation)
Author(s): Alireza Marandi; Marc Jankowski; Ryan Hamerly; Stephen J. Wolf; Evgeni Sorokin; Irina T. Sorokina; Peter G. Schunemann; Martin M. Fejer; Robert L. Byer
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Paper Abstract

Half-harmonic generation is the reverse of second harmonic generation that happens in optical parametric oscillators (OPOs) at degeneracy. It is an intrinsically phase-locked down-conversion process, which can be used to efficiently transfer well-developed near-IR frequency combs to the mid-IR.

We overview recent experimental progress in cascading multiple stages of half-harmonic generation of femtosecond frequency combs starting from a 1-μm pump. We have achieved stable operation with efficiencies as high as ~64%, pulses as short as three optical cycles at 4 μm, and output powers as high as 2.6 W at 2 μm. Our recent numerical and analytical studies of nonlinear dynamics and different operation regimes of femtosecond OPOs indicate a path toward achieving even higher efficiencies and shorter pulses.

Paper Details

Date Published: 21 April 2017
PDF: 1 pages
Proc. SPIE 10088, Nonlinear Frequency Generation and Conversion: Materials and Devices XVI, 1008811 (21 April 2017); doi: 10.1117/12.2255692
Show Author Affiliations
Alireza Marandi, Stanford Univ. (United States)
Marc Jankowski, Stanford Univ. (United States)
Ryan Hamerly, Stanford Univ. (United States)
Stephen J. Wolf, Stanford Univ. (United States)
Evgeni Sorokin, Technische Univ. Wien (Austria)
Irina T. Sorokina, Norwegian Univ. of Science and Technology (Norway)
Peter G. Schunemann, BAE Systems (United States)
Martin M. Fejer, Stanford Univ. (United States)
Robert L. Byer, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 10088:
Nonlinear Frequency Generation and Conversion: Materials and Devices XVI
Konstantin L. Vodopyanov; Kenneth L. Schepler, Editor(s)

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