Abstract

In this Letter, we study short-wavelength conical refraction (CR) via sum-frequency generation (SFG) in the femtosecond regime, a previously unaddressed topic. Based on biaxial crystal of $\mathrm{KGd}{({\mathrm{WO}}_4)}_2$ whose dispersion of optical-axis orientation is negligible in near-IR, conventional femtosecond lasers at 800 and 1054 nm are transformed into CR beams, respectively. Femtosecond CR beams at 454 nm are generated via SFG with the near-IR CR beams. While the generated sum-frequency ring is typically incomplete, a full-ring distribution can be achieved by adopting Type-II SFG with a large phase mismatch. We find that the femtosecond sum-frequency ring under various phase-matching conditions evolves as typical CR beams.

© 2018 Optical Society of America

Stabilized phase detection of heterodyne sum frequency generation for interfacial studies

Bolei Xu, Yajing Wu, Dezheng Sun, Hai-Lung Dai, and Yi Rao
Opt. Lett. 40(19) 4472-4475 (2015)

Enhancing artificial sum frequency generation from graphene-gold metamolecules

Jin Yao, Guoxiong Cai, Na Liu, and Qing Huo Liu
Opt. Lett. 43(13) 3160-3163 (2018)

Variable two-crystal cascade for conical refraction

V. Peet
Opt. Lett. 40(10) 2405-2408 (2015)

On the dual-cone nature of the conical refraction phenomenon

A. Turpin, Yu. Loiko, T. K. Kalkandjiev, H. Tomizawa, and J. Mompart
Opt. Lett. 40(8) 1639-1642 (2015)

Interplay of vortex and non-vortex beam components in a variable two-crystal cascade conical refraction

Erko Jalviste and Viktor Peet
Opt. Lett. 43(19) 4566-4569 (2018)