Frequency stabilization of a high power argon laser

Area of Science:

• Laser physics
• Spectroscopy
• Metrology

Background:

• High-power, single-frequency argon lasers are crucial for various scientific applications.
• Existing frequency stabilization techniques have limitations in performance or complexity.
• Precise frequency control is essential for applications requiring high spectral resolution.

Purpose of the Study:

• To develop and present an advanced technique for stabilizing the frequency of a high-power, single-frequency argon laser.
• To demonstrate superior short-term and long-term frequency stability compared to previously reported methods.
• To achieve reliable frequency stabilization at a significant power level (750 mW).

Main Methods:

• Implementation of a multiple feedback loop system.
• Utilizing an optical cavity discriminator as the frequency reference.
• Stabilizing the optical cavity against a specific iodine vapor absorption line (5145-A).

Main Results:

• Achieved relative short-term frequency stability of approximately +/-2 parts in 10^9.
• Demonstrated relative long-term frequency stability (over 2 hours) of approximately +/-5 parts in 10^9.
• Successful stabilization at a high output power level of 750 mW for the 5145-A line.

Conclusions:

• The described frequency stabilization technique offers significant advantages for high-power argon lasers.
• The system provides robust and highly accurate frequency control, suitable for demanding applications.
• The use of an iodine absorption line offers a reliable and accessible reference for laser frequency stabilization.