Enhancement of self-phase modulation induced spectral broadening in silicon suspended membrane waveguides
Abstract
We experimentally observed a possibly enhanced self-phase modulation (SPM) in silicon suspended membrane waveguides (SMWs) by measuring the spectral broadening of optical pulses. The nonlinear coefficient n 2 and the two-photon absorption coefficient β 2 of silicon SMWs were measured to be (4.6 ± 0.9) × 10-18 m2 W-1 and 0.46 cm GW-1 at 1555 nm wavelength. We also proposed a method of using SPM-induced spectral broadening to obtain the coupling loss of a single grating coupler and experimentally compared the spectra of two grating couplers in silicon SMWs and in silicon-on-insulator waveguides.
- Publication:
-
Journal of Optics
- Pub Date:
- May 2016
- DOI:
- 10.1088/2040-8978/18/5/055503
- Bibcode:
- 2016JOpt...18e5503Z