Automatic laser beam characterization of monolithic Nd:YAG nonplanar ring lasers

Area of Science:

• Atomic, Molecular and Optical Physics
• Laser Physics
• Solid-State Physics

Background:

• Nd:YAG (Neodymium-doped Yttrium Aluminum Garnet) lasers are crucial in various scientific applications.
• Continuous-wave (CW) single-frequency lasers demand high beam stability and quality.
• Characterization of laser performance is essential for reliable experimental outcomes.

Purpose of the Study:

• To conduct a comprehensive beam characterization of CW single-frequency Nd:YAG solid-state ring lasers.
• To assess the stability and performance consistency across multiple laser units.
• To evaluate the long-term operational behavior of these laser sources.

Main Methods:

• Utilized a compact diagnostic instrument incorporating an optical ring resonator for measurements.
• Measured key laser beam properties including power noise, frequency noise, and pointing fluctuations.
• Performed spatial beam quality assessment and long-term automated characterization over 3.5 months.

Main Results:

• Demonstrated that the Nd:YAG lasers are highly stable laser sources at 1064 nm.
• Quantified minimal variations in performance characteristics among different laser samples.
• Confirmed excellent spatial beam quality and low noise levels.

Conclusions:

• The characterized Nd:YAG lasers represent highly stable and reliable sources.
• Low inter-sample variability ensures consistent performance for identical laser models.
• These lasers are exceptionally well-suited for demanding, high-precision optical experiments.