Linear scan control of tunable lasers using a scanning fabry-perot

Area of Science:

• Physics
• Optical Engineering
• Laser Technology

Background:

• Tunable continuous-wave (cw) lasers are crucial for various spectroscopic and photonic applications.
• Maintaining precise control over laser scan rate and minimizing frequency drift are significant challenges in achieving high-resolution measurements.
• Existing methods for laser stabilization can be complex and costly.

Purpose of the Study:

• To present a straightforward and effective technique for servo control of tunable cw laser parameters.
• To enhance the stability and reproducibility of laser output for advanced optical experiments.
• To provide a cost-effective solution for precise laser frequency control.

Main Methods:

• Implementation of a servo control system for tunable cw lasers.
• Utilizing a repetitively swept Fabry-Perot interferometer for real-time monitoring.
• Employing peak position readout from the interferometer as a feedback signal.
• Referencing the system to a highly stabilized laser source for accuracy.

Main Results:

• Successful demonstration of precise servo control over the scan rate of tunable cw lasers.
• Significant reduction in laser frequency drift achieved through the proposed method.
• The technique proved robust and reliable in maintaining laser stability over extended periods.
• Peak position readout provided an accurate measure for feedback control.

Conclusions:

• The described technique offers a simple yet powerful approach for servo control of tunable cw lasers.
• This method significantly improves laser scan rate accuracy and frequency stability.
• The system's reliance on a Fabry-Perot interferometer and peak position readout makes it a practical solution for many laser applications.