Enhancement of self-phase modulation induced spectral broadening in silicon suspended membrane waveguides. (21st March 2016)

• Record Type: Journal Article
• Authors: Zhang, Yaojing; Cheng, Zhenzhou; Liu, Linghai; Zhu, Bingqing; Wang, Jiaqi; Zhou, Wen; Wu, Xinru; Tsang, Hon Ki
• Is Part Of: Journal of optics. Volume 18:Number 5(2016:May)
• Publication Date: 2016-03-21
• Subjects: self-phase modulation -- nonlinear -- suspended membrane waveguide -- silicon-on-insulator; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8978/18/5/055503
• Languages: English
• ISSNs: 2040-8978

Abstract

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 m 2 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.