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We demonstrate maximum scaling of second-harmonic generation as the eighth power of the photonic crystal length without phase matching (PM). This result challenges a commonly held view regarding the necessity of PM for large scaling.
Dramatic enhancement of second and third harmonic generation near the photonic band edge was observed simultaneously in a one-dimensional ZnS/YF3 photonic crystal structure. The theoretical simulations are in good agreement with the experimental results.
We demonstrate a 120-mW hand-held ultraviolet laser at 0.355 mum by attaching a monolithic wavelength converter at the output end of an optical fiber which is delivering a near-infrared laser light at 1.064 mum.
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