Beam Conditioning via Output Coupler and Spatial Filter

Abstract

The monoblock laser is a powerful and compact diode pumped solid state (DPSS) passively q-switched Nd:Yag laser; however, the beam it outputs is less than ideal for applications that require a TEM00. Its compactness also makes single frequency modes hard to maintain during high pulse repetition. Yet, through conscious output coupler choice and careful spatial filtering, the beam can be conditioned and stabilized into a usable beam for LIDAR and DIAL purposes. The conditioned beam can be made both frequency and spatially stable, as well as being filtered into a near TEM00 beam.