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An intracavity, frequency-doubled self-Raman vortex laser.

Andrew J Lee, Chunyu Zhang, Takashige Omatsu

|March 26, 2014

Summary

Researchers achieved yellow light generation using a novel solid-state laser. This diode-pumped laser conserves orbital angular momentum, doubling the topological charge in the frequency-doubled output.

Area of Science:

Optics and Photonics
Laser Physics
Solid-State Lasers

Background:

Diode-pumped solid-state lasers are crucial for various applications.
Raman lasers offer unique wavelength generation capabilities.
Vortex lasers possess orbital angular momentum, enabling structured light generation.

Purpose of the Study:

To demonstrate intracavity frequency doubling of a self-Raman field.
To generate yellow light (586 nm) from a Nd:GdVO(4) vortex laser.
To investigate the conservation of orbital angular momentum during frequency doubling.

Main Methods:

Utilizing a diode end-pumped, solid-state Nd:GdVO(4) vortex laser.
Implementing intracavity frequency doubling of the generated self-Raman field.

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Measuring output power at 586 nm and analyzing beam properties.

Main Results:

Achieved a maximum output power of 727 mW at 586 nm.
Obtained an overall diode-to-yellow conversion efficiency of 4%.
Observed conservation of orbital angular momentum, with the yellow beam's topological charge being double that of the Stokes beam.

Conclusions:

Intracavity frequency doubling is an effective method for generating yellow light from solid-state Raman lasers.
The Nd:GdVO(4) vortex laser system successfully generated structured yellow light.
Orbital angular momentum is conserved and predictably altered during the frequency doubling process.