HeNe Setup
Channel: Williams College Physics
Date: 01/05/2020

Part 1 of the HeNe laser lab. A laser consists of a gain medium, where light can be amplified by stimulated emission, and mirrors to form a cavity where light can be bounced back and forth through the gain medium. Initially, the laser gain tube has glass windows mounted at Brewster's angle (to eliminate reflective losses for one light polarization) but no mirrors. External mirrors are added to form a stable cavity, and adjusted until lasing is achieved.