LASER POINTING STABILITY AND ALIGNMENT TECHNIQUE

摘要

The pointing stability of an argon-ion laser and other types oflasers is very good. However, in some applications, such as LaserDoppler Velocimetry (LDV), the small variation in the angle thatthe beam exits the laser and the position variation are enough toresult in the optical system alignment being compromised or, onfiber optic systems, the inlet to the fiber being burned. This paperpresents a method for monitoring and readjusting the laser beambefore it enters any optical system. Included is a derivation of theoptimal pinhole size for positioning a laser beam.