Injection locking of a KrF laser using a frequency-doubled argon-ion laser pulse

The injection locking of a KrF unstable resonator module has been studied experimentally using a dye-laser-amplified, frequency-doubled seed pulse generated from the 496.5-nm output of an etalon-narrowed argon-ion laser. Partial injection locking was observed starting at input powers of 0.1 W, with greater than 90% injection locking being achieved at input powers of over 1 kW. The output linewidth was experimentally determined to be less than 100 MHz, making possible an ultra-high-brightness KrF laser source.>