High power single-frequency 1112 nm laser by an insertable Nd:YAG/YAG bonded monolithic planar ring oscillator

Area of Science:

• Lasers and Photonics
• Solid-State Physics
• Materials Science

Background:

• High-power, single-frequency lasers are crucial for various scientific and industrial applications.
• Existing laser technologies often face limitations in power scalability, wavelength stability, or efficiency.
• Developing novel laser architectures is essential to meet increasing demands for precise optical sources.

Purpose of the Study:

• To propose and experimentally demonstrate a novel insertable monolithic planar ring oscillator.
• To achieve high power, single-frequency operation at 1112 nm using a Nd:YAG/YAG bonded crystal.
• To investigate the power scalability and stability of the proposed laser design.

Main Methods:

• Fabrication of a monolithic planar ring oscillator using a Nd:YAG/YAG bonded crystal.
• Implementation of a finely designed output surface coating for single-wavelength oscillation at 1112 nm.
• Integration of a half-wave plate and a Terbium Gallium Garnet (Tb3Ga5O12) crystal for unidirectional operation and power scalability.

Main Results:

• Successful demonstration of single-frequency laser operation at 1112.3 nm.
• Achieved output power of 3.9 W with a slope efficiency of 58.6% and optical-to-optical efficiency of 17.7%.
• Demonstrated excellent power stability (within ±0.26% over 20 min) and a narrow laser linewidth of 4.15 MHz.

Conclusions:

• The proposed insertable monolithic planar ring oscillator offers a viable solution for high-power, single-frequency laser generation at 1112 nm.
• The design exhibits promising power scalability and stability, suitable for demanding applications.
• This work contributes to the advancement of solid-state laser technology with a novel and efficient architecture.