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The frequency stabilization method of laser feedback interferometer based on external cavity modulation.

Zhaoli Zeng¹, Shulian Zhang, Yidong Tan

¹The State Key Lab of Precision Measurement Technology and Instrument, Department of Precision Instruments, Tsinghua University, Beijing 100084, China.

The Review of Scientific Instruments

|March 8, 2013

Summary

This summary is machine-generated.

This study presents a novel method for stabilizing laser frequency in interferometers with strong optical feedback. The technique achieves high accuracy, with relative uncertainty below 1 part in 10^7, enhancing measurement precision.

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Area of Science:

Optics and Photonics
Metrology
Laser Physics

Background:

Laser feedback interferometers are crucial for precise measurements.
System accuracy is significantly impacted by laser frequency instability, particularly with strong optical feedback.
Existing stabilization methods may be insufficient under strong optical feedback conditions.

Purpose of the Study:

To develop a simple and effective laser frequency stabilization method for laser feedback interferometers.
To address the challenge of frequency instability in systems with strong optical feedback.
To improve the overall accuracy and stability of laser feedback interferometry.

Main Methods:

External cavity modulation using a piezoelectric ceramic-driven feedback mirror.
Implementation of thermal frequency stabilization.
Integration of these methods to achieve a stable laser feedback interferometer.

Main Results:

Demonstration of a stable laser feedback interferometer.
Achieved strong anti-disturbance performance for the feedback optical field.
Attained a relative uncertainty of less than 1 part in 10^7 for frequency stabilization.

Conclusions:

The proposed external cavity modulation and thermal stabilization method effectively stabilizes laser frequency in feedback interferometers.
This technique significantly enhances measurement accuracy, even under strong optical feedback.
The method offers a robust and precise solution for laser feedback interferometer applications.