Self‐Referencing 3D Characterization of Ultrafast Optical‐Vortex Beams Using Tilted Interference TERMITES Technique. Issue 4 (24th January 2023)

• Record Type: Journal Article
• Authors: Pan, Jinyu; Chen, Yifei; Huang, Zhiyuan; Zhang, Cheng; Chen, Tiandao; Liu, Donghan; Wang, Ding; Pang, Meng; Leng, Yuxin
• Is Part Of: Laser & photonics reviews. Volume 17:Issue 4(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-24
• Subjects: optical angular momentum -- optical vortex -- self‐referencing measurement -- spatio‐temporal characterization -- ultrafast pulse measurement; Lasers -- Periodicals; Photonics -- Periodicals; Lasers -- Périodiques; Photonique -- Périodiques; 621.36
• DOI: 10.1002/lpor.202200697
• Languages: English
• ISSNs: 1863-8880

Abstract

Abstract: Femtosecond light pulses carrying optical angular momentums (OAMs), possessing intriguing properties of helical phase fronts and ultrafast temporal profiles, enable many applications in nonlinear optics, strong‐field physics, and laser micromachining. While generation of OAM‐carrying ultrafast pulses and their interactions with matters are intensively studied in experiments, 3D characterization of ultrafast OAM‐carrying light beams in spatiotemporal domain has, however, proved difficult to achieve. Conventional measurement schemes rely on the use of a reference pulsed light beam, which needs to be well characterized in its phase front and to have sufficient overlap and coherence with the beam under test, largely limiting practical applications of these schemes. Here a self‐referencing set‐up is demonstrated based on a tilted interferometer that can be used to measure complete spatiotemporal information of OAM‐carrying femtosecond pulses with different topological charges. Through scanning one interferometer arm, the spectral phase over the pulse spatial profile can be obtained using the tilted interference signal, and the temporal envelope of the light field at one particular position around its phase singularity can be retrieved simultaneously, enabling 3D beam reconstruction. This self‐referencing technique, capable of measuring spatiotemporal ultrafast optical‐vortex beams, may find many applications in fields of nonlinear optics and light–matter interactions. Abstract : Ultrafast optical‐vortex beams are of importance in many experiments, while 3D reconstruction of such beams has proved difficult to achieve. Here a novel tilted total electrical‐field reconstruction using a Michelson interferometer temporal scan (TERMITES) technique is reported, which can realize self‐referenced spatiotemporal characterization of ultrafast vortex pulses, providing a powerful tool for studying light–matter interactions.