Measurement and control of subangstrom mirror displacement by acousto-optical technique
Abstract
Control of laser mirror spacing and angular orientation is important for laser frequency and mode stability. A wave front sensor that employs acousto-optic modulation and optical heterodyning has been applied in conjunction with a servo-control loop to control mirror motion. The measurement and control of subangstrom mirror displacements are possible using this system. Experimental results are presented that indicate closed-loop control of mirror displacement to within 0.06 nm.
- Publication:
-
Review of Scientific Instruments
- Pub Date:
- July 1982
- DOI:
- Bibcode:
- 1982RScI...53..963W
- Keywords:
-
- Acousto-Optics;
- Frequency Modulation;
- Helium-Neon Lasers;
- Laser Mode Locking;
- Mirrors;
- Optical Heterodyning;
- Drift (Instrumentation);
- Laser Stability;
- Noise Reduction;
- Servocontrol;
- Wave Fronts;
- Lasers and Masers