We demonstrate, for the first time to the best of our knowledge, the direct generation of higher-order Laguerre–Gaussian (LG) petal modes, formed of the coherent superposition of positive and negative LG modes with the topological charge of
±
ℓ
as an eigen mode, from a compact diode end-pumped
P
r
3
+
:
L
i
Y
F
4
(YLF) laser with an intra-cavity lens configuration. The on-axis displacement of the intra-cavity lens with spherical aberration allows the selective operation of the desired higher-order LG modes with
|
ℓ
|
≤
31
from the laser cavity at 640 nm and 607 nm. Such visible higher-order LG modes will offer new applications in optical manipulation, quantum/optical underwater telecommunication, and microfabrication.
Optical vortex has been receiving tremendous interests in a wide range of applications such as fluorescence microscopy with a high spatial resolution beyond the diffraction limit [1], optical manipulation [2], and materials processing [3].
We report on, for the first time, the generation of visible (640 nm) and ultraviolet (320 nm) geometric modes (GMs) from a frequency-doubled, diode-pumped Pr3+:YLF laser.
Herein, we report on the direct generation of red (640 nm) and orange (607 nm) higher-order LG modes from the Pr3+:LiYF4 (Pr3+:YLF) laser with an intra-cavity plano-convex spherical lens. The strong spherical aberration of the intra-cavity lens allows the oscillation of red higher-order LG modes represented by the coherent superposition of degenerated LG modes with positive and negative orbital angular momentum (OAM), |ℓ|≤31. A desired higher-order LG mode is selectively generated from the laser cavity simply by adjusting an on-axis position of the intra-cavity lens. Also, the system enables the generation of orange higher-order LG modes coherently superposed by degenerated positive and negative LG modes with |ℓ|≤17.
We report on, for the first time, direct generation of circular geometric modes from a Pr3+:LiYF4 (Pr3+:YLF) laser cavity with an intra-cavity plano-convex lens.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.