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Highly tunable second-harmonic generation in all-optically poled silicon nitride waveguides.
- Source :
-
Optics letters [Opt Lett] 2020 Apr 01; Vol. 45 (7), pp. 1958-1961. - Publication Year :
- 2020
-
Abstract
- The availability of nonlinear parametric processes, such as frequency conversion in photonic integrated circuits is essential. In this contribution, we demonstrate a highly tunable second-harmonic generation in a fully complementary metal-oxide-semiconductor (CMOS)-fabrication-compatible silicon nitride integrated photonic platform. We induce the second-order nonlinearity using an all-optical poling technique with the second-harmonic light generated in the fundamental mode, and a narrow quasi-phase matching (QPM) spectrum by avoiding higher-order mode mixing. We are then able to broadly tune the phase-matched pump wavelength over the entire C-band (1540 nm to 1560 nm) by varying the poling conditions. Fine-tuning of QPM is enabled by thermo-optic effect with the tuning slope Δ λ / Δ T in our device being 113.8 pm/°C. In addition, we exploit the measurable variation of the 3 dB QPM bandwidth to confirm how the length of the all-optically inscribed grating varies with exposure time.
Details
- Language :
- English
- ISSN :
- 1539-4794
- Volume :
- 45
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Optics letters
- Publication Type :
- Academic Journal
- Accession number :
- 32236041
- Full Text :
- https://doi.org/10.1364/OL.387603