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Proceedings Paper

Ultrafast and ultra-broadband optical-vortex pulse generation and characterization
Author(s): Ryuji Morita; Keisaku Yamane; Zhili Yang; Yasunori Toda
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Paper Abstract

Subsequently to the previous generation of ultrashort and ultra-broadband optical-vortex (OV) pulses (pulse energy: several tens of μJ) in few-cycle regime, we demonstrate high-power OV pulse generation with topological charge flexibility by employing a 4-f OV converter and pre- and main-amplifications. Our configuration overcomes the low-throughput drawback of the vortex converter, simultaneously compensating for the angular dispersion. It also gives flexibility of OAMor topological-charge control. Thus, we succeed in generation of mJ-class ultra-broadband OV pulses (∼790-∼820 nm) with a programmably-controlled topological charge. Moreover, we experimentally exhibit a high-precision method for measuring frequency-resolved OAM spectrum of femtosecond ultra-broadband OV pulses on the basis of electric-field reconstruction in the spatial domain. In addition, we present the generation of ultrashort pulses with axially-symmetric polarization by coherent beam combining of OVs.

Paper Details

Date Published: 25 February 2014
PDF: 7 pages
Proc. SPIE 8999, Complex Light and Optical Forces VIII, 89990X (25 February 2014); doi: 10.1117/12.2036919
Show Author Affiliations
Ryuji Morita, Hokkaido Univ. (Japan)
Keisaku Yamane, Hokkaido Univ. (Japan)
JST, CREST (Japan)
Zhili Yang, Hokkaido Univ. (Japan)
Yasunori Toda, Hokkaido Univ. (Japan)

Published in SPIE Proceedings Vol. 8999:
Complex Light and Optical Forces VIII
David L. Andrews; Enrique J. Galvez; Jesper Glückstad, Editor(s)

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