Micro optical vortex generator fabricated by femtosecond laser

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Important Dates

Conference:

Aug. 18-20, 2018

Full Paper Due: Jul. 20, 2018

Abstract Due: Jul. 20, 2018

Audience Registration Due:
Aug. 18, 2018

Presentations of The Int'l Symposium on Photonics and Optoelectronics (SOPO 2016)

● Micro optical vortex generator fabricated by femtosecond laser
Author(s)
Zhen-Nan Tian
Affiliation(s)
Jilin University
KEYWORDS
vortex generator, femtosecond laser
ABSTRACT
Light beams with a helical phase front which possess an orbital angular momentum (OAM) along their direction of propagation, can induce optical vortex (OV) as focused. As a novel optical phenomenon, OV beams hold the promise in various physical mechanical, and technological appli-cations, such as optical manipulation, optical communication, quantum information, and astronomy. Over the past decades, efforts have been made to fabricate and design OV beams. Over the past decades, efforts have been made to fabricate and design OV beams, including the geometric method, hologram fork dislocation grating, spiral phase plate, hollow optical fiber, and changing optical parametric oscillator. The above-mentioned methods are typical approaches to obtain OV beams and greatly broaden their applications. Here, we fabricated spiral phase plate (SPP) on the surface of Lithium niobate (NL) and spiral zone plate in LN with femtosecond laser direct writing (FsLDW). The optical properties were demonstrated in the experiment, which is consistent with the theoretical simulation. This method can greatly simplify the OV generator and improve the integration of optical systems. Our findings open up a new avenue to realize highly integrated optical element and offer great convenience to their practical applications in optical manipulation and quantum communication.