Lyabin

pp.30-62

pp. 20-35

Spatial, time and energy characteristics of a copper vapor laser (CVL|) have been investigated in the one convex mirror mode using the most powerful industrial sealed-off active elements (AE) of “Kulon” series: 15 W GL-206D model and 20 W GL-206I one; the laser capabilities for microprocessing of materials are defined. The main advantage of one mirror mode is that one high quality beam with a high stability of directivity pattern axis is formed in CVL thereby increasing the quality of microprocessing.At small radii of mirror curvature (R = 6-30 mm) the CVL output radiation beam divergence can differ from diffraction limit only by 2-3 times (0.15-0.35 mrad), and a peak power density in a focused spot can reach 10⁹…10¹⁰ W/cm² values. The use of CVL with one mirror as a driving oscillator (DO) in a copper vapor laser system (CVLS) of the type: driving oscillator – spatial filter- collimator – power amplifier (DO – SFC – PA) using 30-50 W industrial “Crystal” AEs in PAs allows to increase peak power density up to 1011 W/cm², sufficient for efficient and qualitative microprocessing of materials up to 1 mm thick.