Advanced Photonics, 2020, 2 (4): 045001, Published Online: Jul. 8, 2020   

Two-channel, dual-beam-mode, wavelength-tunable femtosecond optical parametric oscillator Download: 870次

Author Affiliations
1 Tianjin University, College of Precision Instrument and Optoelectronics Engineering, Ultrafast Laser Laboratory, Tianjin, China
2 Leibniz Universität Hannover, Institut für Quantenoptik, Hannover, Germany
3 Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering-Innovation Across Disciplines), Hannover, Germany
Abstract
Optical vortices, which carry orbital angular momentum, offer special capabilities in a host of applications. A single-laser source with dual-beam-mode output may open up new research fields of nonlinear optics and quantum optics. We demonstrate a dual-channel scheme to generate femtosecond, dual-wavelength, and dual-beam-mode tunable signals in the near infrared wavelength range. Dual-wavelength operation is derived by stimulating two adjacent periods of a periodically poled lithium niobate crystal. Pumped by an Yb-doped fiber laser with a Gaussian (lp = 0) beam, two tunable signal emissions with different beam modes are observed simultaneously. Although one of the emissions can be tuned from 1520 to 1613 nm with the Gaussian (ls = 0) beam, the other is capable of producing a vortex spatial profile with different vortex orders (ls = 0 to 2) tunable from 1490 to 1549 nm. The proposed system provides unprecedented freedom and will be an exciting platform for super-resolution imaging, nonlinear optics, multidimensional quantum entanglement, etc.

Jintao Fan, Jun Zhao, Liping Shi, Na Xiao, Minglie Hu. Two-channel, dual-beam-mode, wavelength-tunable femtosecond optical parametric oscillator[J]. Advanced Photonics, 2020, 2(4): 045001.

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