In this work, we report on performance of a spatial walk-off compensated β-BBO stack with adhesive-free bonding technique, for efficiently converting from the visible to DUV range. The physics behind the WOC BBO stack are demonstrated, followed by simulation of DUV conversion efficiency in an external resonance cavity. We also demonstrate experimentally the beam quality improvement in a 4-layer WOC BBO stack over a single BBO crystal.
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Da Li, Huai-Chuan Lee, Stephanie K. Meissner, Helmuth E. Meissner, "Spatial walk-off compensated beta-barium borate stack for efficient deep-UV generation," Proc. SPIE 10516, Nonlinear Frequency Generation and Conversion: Materials and Devices XVII, 105161O (15 February 2018);