Second- and third-order nonlinear wavelength conversion in an all-optically poled Si3N4 waveguide

Silicon nitride (Si3N4) is commonly employed to integrate third-order nonlinear optical processes on a chip. Its amorphous state, however, inhibits significant second-order nonlinear response. Recently, second-harmonic generation enhancement has been observed in Si3N4 waveguides after an all-optical poling (AOP) method. Here we demonstrate that, after AOP of a Si3N4 waveguide, for up to 2 W of coupled pump power, the same telecom-band signal undergoes larger interband wavelength conversion efficiency, based on sum-frequency generation (SFG), than intraband wavelength conversion, based on four-wave mixing. We also confirm the appearance of a phase-matching condition after AOP by measuring the conversion bandwidth and efficiency of SFG at different pump wavelengths. (C) 2018 Optical Society of America


Published in:
Optics Letters, 44, 1, 106-109
Year:
Jan 01 2019
Publisher:
Washington, OPTICAL SOC AMER
ISSN:
0146-9592
1539-4794
Keywords:
Laboratories:




 Record created 2019-01-23, last modified 2019-02-25


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