Ultrafast and ultra-broadband optical-vortex pulse generation and characterization

Ryuji Morita; Keisaku Yamane; Zhili Yang; Yasunori Toda

doi:10.1117/12.2036919

25 February 2014 Ultrafast and ultra-broadband optical-vortex pulse generation and characterization

Ryuji Morita, Keisaku Yamane, Zhili Yang, Yasunori Toda

Proceedings Volume 8999, Complex Light and Optical Forces VIII; 89990X (2014) https://doi.org/10.1117/12.2036919
Event: SPIE OPTO, 2014, San Francisco, California, United States

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.

Citation Download Citation

Ryuji Morita, Keisaku Yamane, Zhili Yang, and Yasunori Toda "Ultrafast and ultra-broadband optical-vortex pulse generation and characterization", Proc. SPIE 8999, Complex Light and Optical Forces VIII, 89990X (25 February 2014); https://doi.org/10.1117/12.2036919

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