is an actual strip chart record showing the excellent single-frequency
stability of a LEXEL™ Model 85 Argon Laser with
the Model 503 Temperature-Controlled Etalon Assembly. The laser output
power was 300mW at 514.5nm.
The frequency stability was measured using the iodine absorption cell technique. After a 60-minute
warm-up, the maximum
frequency excursion was less than ±75 MHz over the two-hour test period.
The room temperature was maintained within 1°F using the normal building
air conditioning system.
Each LEXEL™ single-frequency ion laser
is tested over a 10-hour period for similar performance.