Directly writing binary multi-sector phase plates on fused silica using femtosecond laser

Abstract

Light carrying orbital angular momentum (OAM) has a spatial distribution of intensity and phase, which attracts considerable interest regarding several potential applications in optical and quantum scenarios recently. Spiral phase plates are commonly used elements for generating and analyzing OAM states. In this study, we put forward a method of directly writing binary multi-sector phase plates using the femtosecond laser. These phase plates are engraved on fused silica, which could be applied in high-intensity regimes. Different binary multi-sector phase plates were generated with high quality, which were proved by the observation of their structures, accompanied by detecting the beam patterns with the Gaussian beams. The proposed method provides a crucial basis for the rapid manufacturing of phase plates using convenient equipment, which can generate the superposition OAM states and may lead to the capability of measuring the high-dimensional entanglement.

Formation of hybrid higher-order cylindrical vector beams using binary multi-sector phase plates

“…The well known binary multi-sector phase plates 53 , 54 can be used for generation of functions approximating the above considered trigonometric functions 55 – 57 . The expansion in a Fourier series of the transmission function of a phase plate f ( φ ) = exp[ iψ ( φ )], where ψ ( φ ) is a phase of the phase plate, has the following form: where …”

Numerical and Experimental Investigation of Morphological Modification on Fused Silica Using CO2 Laser Ablation

“…In order to verify the developed numerical model, multi-stage conical structures were processed using the experimental setup of CO 2 laser ablation with the wavelength at 10.6 µm. The multi-stage conical structures with identical parameters were prepared on a fused silica sample by ultrafast laser inscription with the equipment described in [18]. Initially, laser ablation with the optimum parameters that were obtained from the numerical model was performed on the multi-stage structure to eliminate the stages and generate a continuous slope.…”

Review of special issue on high power facility and technical development at the NLHPLP

“…For processing and coating of the components developed, Zhou et al [14] present a directly writing binary multi-sector phase plate on fused silica using femtosecond laser. In addition, Xiong et al [15] have developed a type of λ/4-λ/4 ultrabroadband antireflective coating using modified low refractive silica and high refractive silica layers by a sol-gel dip coating method for amplifier blast shields of SG-II facility.…”

“…For processing and coating of the components developed, Zhou et al. [14] present a directly writing binary multi-sector phase plate on fused silica using femtosecond laser. In addition, Xiong et al.…”