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Efficient KTiOPO4 blue-light converter for monochromatic 1.3188-μm emission line of pulsed Nd:YAG laser

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3 Author(s)
Xiaodong Mu ; Department of Electrical and Computer Engineering, Lehigh University, 19 Memorial Drive West, Bethlehem, Pennsylvania 18015 ; Shi, Wei ; Ding, Y.J.

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A frequency converter is designed for producing efficient blue light at 0.4396 μm from a monochromatic, pulsed, 1.3188-μm Nd-doped emission line by quasi-phase-matched (QPM) second-harmonic generation (SHG), followed by sum-frequency generation, in an integrated, periodically poled KTiOPO4 (KTP) and monodomain KTP crystal. An average 55-mW (peak power of 43.0 W) blue light is achieved by us for an average 2.5-W (peak power of 2.0 kW) pump power; the overall conversion efficiency is thus 2.2%. Through polarization optimization, the same device produces an average 435 mW (peak power of 339.8 W) for the red light through QPM SHG, with a corresponding conversion efficiency of 16%. As a practical blue-light converter, the angle- and temperature-tuning characteristics and period tolerance have been fully investigated. © 2003 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:93 ,  Issue: 12 )

Date of Publication:

Jun 2003

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