Chirped Bragg Gratings for On-Chip Pulse Compression in the Mid-Infrared Wavelength Range

Integrated ultrashort pulsed lasers are widely used in the telecom wavelength range. However, the mid-infrared spectral range still lacks compact integrated ultrashort pulsed lasers. In this work, we present integrated chirped Bragg gratings for pulse compression working in the 7.8–8.2 µm wavelength range. It will be shown that group delay dispersion of a few tens of ps2 can be obtained in such spectral range. Considering an input pulse of 11.8 ps, a compression factor of 9 can thus be obtained, with an increase of the peak power of a factor 9.