Optical Vortex Laser
A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Lasers, Light Sources and Sensors".
Deadline for manuscript submissions: 31 August 2024 | Viewed by 822
Special Issue Editor
Special Issue Information
Dear Colleagues,
Optical vortex beams bearing phase singularities and carrying orbital angular momentum are attracting more people to study from fundamental and applied perspectives, with investigations into optical microscopy, hyper-entanglement, strong coupling between light and matter, optical trapping and optical spanners, classical and quantum communications, etc. On the basis of the number of phase singularities in optical vortex beams, they can mainly be divided into two categories: on-axis single singularity optical vortex beams and multi-singularity optical vortex beam. The multi-singularity optical vortex beam can be further subdivided into two types: optical vortex arrays and optical vortex lattices.
At present, optical vortex beams are mainly generated through passive and active methods. Compared to the passive method of external cavity mode transformation, the active method has significant advantages in conversion, beam quality (mode purity), and power improvement. This Special Issue aims to present original state-of-the-art research articles dealing with vortex laser generated with active method, including off-axis pumping method, annular pumping method, intracavity spherical aberration method, etc. Specifically, papers are also solicited that deal with vortex lasers coupled to various kinds of nonlinear frequency conversion, such as second harmonic generation, sum-frequency generation, optical parametric oscillation, and Raman processes, and so on. Researchers are invited to submit their contributions to this Special Issue. Topics include, but are not limited to:
- Scalar vortex laser;
- Vector vortex laser;
- Vortex arrays laser;
- Vortex lattices laser;
- Raman vortex laser;
- Intra-cavity frequency-doubled/sum-frequency generation vortex laser;
- Intra-cavity optical parametric vortex laser;
- Cascaded-pumped vortex laser;
- Vortex random fiber laser;
- Kaleidoscope vortex laser.
Dr. Peng Li
Guest Editor
Manuscript Submission Information
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Keywords
- scalar vortex laser
- vector vortex laser
- vortex arrays laser
- vortex lattices laser
- raman vortex laser
- intra-cavity frequency-doubled/sum-frequency generation vortex laser
- intra-cavity optical parametric vortex laser
- cascaded-pumped vortex laser
- vortex random fiber laser
- kaleidoscope vortex laser
Planned Papers
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Planned Paper
Tentative Title: Generating Optical Vortex Array Laser Beams with a Dual-Phase Modulation Digital Laser System
Authorship: Ly Ly Nguyen Thi, Ko-Fan Tsai, and Shu-Chun Chu*
Affiliations: Department of Physics, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan; *[email protected]
Abstract:
This study presents an efficient and practical intra-cavity approach for selectively generating vortex array laser beams using a dual-phase modulation digital laser system. The stable optical vortex array laser beams are formed by superimposing cavity Hermite-Gaussian (HG) eigenmodes. In particular, when the selected cavity HG modes share the same Gouy phase, the resulting optical vortex beam can preserve its light field pattern, thereby maintaining the optical vortex properties in both the near and far fields. Numerical results demonstrate that employing dual-phase modulation establishes optimal boundary conditions for selecting HG modes within the cavity, leading to successful generation of various vortex array laser beams, such as 1D vortex array laser and checkerboard-distributed vortex array laser. Experimental validation of the proposed method confirms the ability to select optical vortex array lasers solely through the control of the loaded phase of the dual-phase modulation digital laser. The results demonstrate the ability of digital lasers for dynamically controlling and generating optical vortex array lasers.
