Abstract
One of the obstacles in obtaining high power/energy laser sources isself-focusing, which stems from the nonlinear phase shift (B-integral)accumulated during beam propagation in Kerr media. Phase-mismatchedsecond-harmonic generation may impose a nonlinear phase shift on thefundamental with controllable sign and magnitude, which can be used tocompensate for self-focusing with a single-pass configuration. We havedemonstrated such a possibility for picosecond pulses theoretically andexperimentally, and both configurations of pre- and post-compensationby a β-barium borate crystal have been studied in detail. Cascadedsecond-order nonlinearity-based compensation for self-focusing mayprovide an auxiliary means to the conventional B-integral controltechniques.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
