Efficient self-stimulated Raman scattering with simultaneously self-mode-locking in a diode-pumped Nd:GdVO₄ laser

Area of Science:

• Laser Physics
• Nonlinear Optics
• Solid-State Lasers

Background:

• Picosecond lasers are crucial for various scientific and industrial applications.
• Simultaneous stimulated Raman scattering and self-mode-locking in a single crystal offer a compact and efficient laser design.
• Neodymium-doped gadolinium orthovanadate (Nd:GdVO4) is a promising gain medium for laser development.

Purpose of the Study:

• To demonstrate an efficient diode-pumped picosecond self-Raman Nd:GdVO4 laser.
• To achieve simultaneous stimulated Raman scattering and self-mode-locking within the same crystal.
• To generate a high-power yellow laser via second-harmonic generation.

Main Methods:

• Theoretical analysis of the self-mode-locked design.
• Adoption of a compact and feasible dual-concave cavity.
• Diode-pumping of the Nd:GdVO4 crystal.
• Utilizing a lithium triborate (LiB3O5) crystal for second-harmonic generation.

Main Results:

• Efficient diode-pumped picosecond self-Raman Nd:GdVO4 laser achieved.
• Simultaneous stimulated Raman scattering and self-mode-locking demonstrated in a single crystal.
• Maximum output power of 736 mW for the first-Stokes Raman laser at a 1.51 GHz repetition rate.
• Second-harmonic generation of a yellow laser at 586.5 nm accomplished.

Conclusions:

• The developed laser design is efficient and compact.
• Simultaneous stimulated Raman scattering and self-mode-locking in Nd:GdVO4 is feasible and effective.
• The system provides a high-power picosecond yellow laser source for potential applications.