A5100715743- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Photonic Crystal and Fiber Optics
Singapore University of Technology and Design
2021-2022
Supercontinuum generation (SCG) through soliton fission provides high‐brightness, spectrally‐rich light needed for hyperspectral imaging, broadband spectroscopy, and fluorescence microscopy. The prospect of miniaturization has led to many demonstrations this phenomenon in integrated platforms. However, due the moderate dispersion nonlinearity generally available channel waveguides, femtosecond pulses have typically been required date, as use picosecond would require unpractically long...
In article number 1900114, Ezgi Sahin, Dawn T. H. Tan, Benjamin J. Eggleton, and co-workers describe how optical pulses propagating through a nonlinear ultra-silicon-rich nitride (USRN) grating experience high anomalous group-velocity dispersion at the photonic band edge. The grating-induced counteracts large nonlinearity Bragg solitons form. At different power regimes, temporal compression of varying degrees. Third-order initiates soliton fission. Temporal dynamics soliton-effect fission...
We experimentally demonstrate picosecond pulse generation from a low-power continuous-wave signal, generating 18ps pulses, by leveraging cross-phase modulation of pump pulses with low peak power 3.7 W in an ultra-silicon-rich nitride Bragg grating.
Wideband Spectral Broadening Bragg soliton-effect compression and fission are harnessed for the enhancement of supercontinuum spectra. In article number 2100107, Ezgi Sahin, Dawn T. H. Tan, co-workers demonstrate a 4.3x spectral bandwidth enhancement, as well high coherence in generated with picosecond pulses. The results highlight how efficient nonlinear processes gratings may facilitate generation while maintaining low powers compact footprint.