Optical free-carrier generation in silicon nano-waveguides at 1550 nm

Nonlinearities in porous silicon optical waveguides at 1550 nm.

We report an experimental investigation of the nonlinear optical properties of nanoporous silicon optical waveguides measured at 1550 nm. The nonlinear properties including two-photon absorption, self-phase modulation, free-carrier absorption and free-carrier plasma dispersion are characterized and compared with similar measurements conducted on a conventional silicon-on-insulator ridge wavegui...

Octave spanning supercontinuum generation in InGaP waveguides on a silicon substrate at 1550 nm

We present an octave spanning supercontinuum (at the -35 dB level) ranging from 1100 nm to 2500 nm in InGaP photonic wire waveguides that are bonded to a silicon substrate and pumped by an ultrashort pulsed laser centered at 1550 nm. OCIS codes: (130.4310) Integrated optics, Nonlinear; (190.4400) Nonlinear optics, materials; (320.6629) Ultrafast optics, supercontinuum generation; (90.4390) Nonl...

Optical Absorption of Silicon Nitride Membranes at 1064 nm and at 1550 nm

Horizontal single and multiple slot waveguides: optical transmission at λ = 1550 nm

We experimentally demonstrate the optical transmission at 1550 nm of the fundamental slot modes (quasi-TM modes) in horizontal single and multiple slot waveguides and ring resonators consisting of deposited amorphous silicon and silicon dioxide. We demonstrate that the horizontal multiple slot configuration provides enhanced optical confinement in low index slot regions compared to a horizontal...

Label-free imaging of thick tissue at 1550 nm using a femtosecond optical parametric generator.

We have developed a simple wavelength-tunable optical parametric generator (OPG), emitting broadband ultrashort pulses with peak wavelengths at 1530-1790 nm, for nonlinear label-free microscopy. The OPG consists of a periodically poled lithium niobate crystal, pumped at 1064 nm by a ultrafast Yb:fiber laser with high pulse energy. We demonstrate that this OPG can be used for label-free imaging,...