FREQUENCY-STABILIZED HE-NE LASER equipment

Applications:

Metrological performance of the laser meets the International Committee for Weights and Measures requirements for standard radiation devices that can be used to generate length etalons.

Laser frequency is stabilized by the resonant saturated absorbtion of molecular iodine. High frequency laser pumping is used to decrease fourfould the amplitude noise level comparing with conventional DC feed circuits. Relative frequency instability is decreased to 5x10^-13 (averaging time 100s).