3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal

Abstract

Efficient blue lasers based on gain structure optimizing of vertical-external-cavity surface-emitting laser with second harmonic generation

Photonic applications of lithium niobate crystals

“…Aperiodic domain structures where used to produce visible light sources by SHG. In the work by Birkin et al [82], the aperiodic structure was designed to enlarge the spectral acceptance bandwidth of the structure to accommodate to the spectral bandwidth of a gain switched diode laser with 30 ps pulses. An average blue output power of 3.6 mW was obtained with a 83 mW at 980 nm pump.…”

Surface Hexagonally Poled Lithium Niobate Waveguides

“…Lithium niobate waveguide structures are commonly used in the telecom industry for high speed optical switching but research is increasingly associated with the expansion of its use in frequency conversion and higher harmonic frequency generation. The development of ferroelectric domain engineering allows direct access to the largest nonlinear coefficient d 33 via highly efficient quasi phase matched (QPM) harmonic generation by periodic domain inverted structures in both bulk and waveguide format [1,2]. Furthermore, expansion of periodically poled LiNbO 3 structures into two-dimensional (2-D) geometries has been successfully demonstrated for both single and cascaded nonlinear interactions on the same sample [3] in bulk hexagonally poled lithium niobate (HexLN).…”

Vertical-external-cavity semiconductor lasers

“…[36,37]). However, this approach is complicated by the problem of matching of the mode of the edge-emitter into the nonlinear crystal.…”