
A new type of laser feedback interferometry based on a non-planar ring oscillator (NPRO) laser system is demonstrated, which can achieve frequency-shifted interferometry without using external acousto-optic modulators.


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frequency-shifted-laser-feedback-interferometry-in-non-planar-ring-oscillators-a-novel-approach-for-high-precision-vibration-measurements


Frequency-Shifted Laser Feedback Interferometry in Non-Planar Ring Oscillators: A Novel Approach for High-Precision Vibration Measurements
