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Nd:YSAG waveguide-grating vortex laser: design and implementation.

Siying Gao, Zhixiang Chen, Yujie Xiong

|September 15, 2023

Summary

We fabricated a hybrid waveguide-grating vortex laser using femtosecond laser direct writing (FsLDW) in Nd:YSAG. This integrated photonics device efficiently generates vortex beams for advanced optical applications.

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Area of Science:

Integrated photonics
Laser physics
Materials science

Background:

Waveguide lasers are crucial for integrated photonics.
Vortex beams have unique properties for optical applications.
Femtosecond laser direct writing (FsLDW) enables complex microfabrication.

Purpose of the Study:

To fabricate a hybrid waveguide-grating vortex laser using FsLDW.
To investigate the laser performance and beam properties.
To explore applications in integrated photonics.

Main Methods:

Fabrication of a hybrid waveguide-grating structure in Nd:YSAG using FsLDW.
Optical simulation to optimize structural parameters.
Experimental characterization of laser output and vortex beam properties.

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Main Results:

Efficient vortex beam generation in passive operation at 1064 nm.
Dual-wavelength lasing at 1060/1062 nm and vortex lasing at 1060 nm under optical pumping.
Detailed analysis of laser performance and diffraction characteristics.

Conclusions:

Successful fabrication of a hybrid waveguide-grating vortex laser via FsLDW.
Demonstrated efficient vortex beam generation and dual-wavelength lasing.
Provides a foundation for FsLDW and waveguide-grating applications in integrated photonics.