Spectral features associated with nonlinear pulse compression in Bragg gratings

Abstract

We report, for the first time to our knowledge, direct spectral measurements of nonlinear spectral broadening caused by nonlinear propagation through Bragg gratings written on integrated AlGaAs waveguides. The spectral broadening is associated with pulse compression from 400 to 80 ps. The high nonlinearity of AlGaAs enables high-repetition-rate, low-peak-power sources to be used, facilitating easy spectral measurements.

Linear and nonlinear pulse propagation in a multiple-quantum-well photonic crystal

“…Here, a one-dimensional photonic band gap is formed at the central Bragg wavelength, i.e., twice the optical interlayer distance. 1 Prominent realizations are fiber Bragg gratings 2,3 and integrated Bragg waveguides, 4,5 in which the interplay of the grating dispersion near the photonic band gap with the Kerr-type nonlinearity allows efficient pulse shaping and the propagation of soliton-like pulses. A special class of these Bragg grating solitons are gap solitons that have been predicted for pulses with spectra completely within the band gap.…”

Gap-soliton switching in short microresonator structures

“…Recently, gap-soliton experiments were performed in AlGaAs waveguides with etched Bragg gratings. 20,21 The advantage of the AlGaAs structure is that it allows for large effective index contrasts in the grating. Consequently the 5-cm gratings in a fiber can be replaced by 5-mm gratings in AlGaAs.…”

Investigation on the bistability of linearly chirped nonlinear Bragg gratings

“…The used technologies mainly include spatial taper, phase shift, chirp and nonlinear refractive index axial varying, etc. [5][6][7][8][9][10][11].…”