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Blue‐light second‐harmonic generation in ion‐implanted KNbO3 channel waveguides of new design

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6 Author(s)
Fluck, D. ; Nonlinear Optics Laboratory, Institute of Quantum Electronics, Swiss Federal Institute of Technology, ETH‐Hönggerberg, 8093 Zürich, Switzerland ; Pliska, T. ; Gunter, P. ; Bauer, St.
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We report phase‐matched second‐harmonic generation in KNbO3 channel waveguides. The guides were fabricated by one single homogeneous He+ ion irradiation and specially structured photoresist on the KNbO3 crystals serving as an implantation mask. The mask enabled the formation of channel guides with a trapezoidal‐shaped cross section providing simultaneous confinement of both TE and TM modes. 2.6 mW second‐harmonic blue‐light at 441 nm was generated in a 5.8‐mm‐long guide for an incident fundamental power of 280 mW. © 1996 American Institute of Physics.

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Applied Physics Letters  (Volume:69 ,  Issue: 27 )