Backswitch poling in lithium niobate for high-fidelity domain patterning and efficient blue light generation
- 20 September 1999
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 75 (12) , 1673-1675
- https://doi.org/10.1063/1.124787
Abstract
In nonlinear optics applications employing quasiphase matching, short-pitch domain gratings are generally required for the efficient generation of visible and ultraviolet light. Here we introduce an improved electric-field poling technique, which incorporates spontaneous backswitching and leads to uniform short-pitch domain structures. The total volume of backswitched material, and hence the duty cycle of the backswitched domain grating, can be accurately controlled. First-order single-pass continuous-wave second harmonic generation of 60 mW at 460 nm is achieved at 6.1%/W efficiency in 0.5-mm-thick 4-μm-period backswitch-poled lithium niobate.Keywords
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