Title :
Generating Chirped Microwave Pulses Using an Integrated Distributed Fabry–Pérot Cavity in Silicon-on-Insulator
Author :
Ming Ma ; Rochette, Martin ; Chen, Lawrence R.
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
We demonstrate photonic generation of chirped microwave pulses (CMPs) using an integrated distributed Fabry-Pérot cavity (DFPC) in silicon-on-insulator as a spectral shaper. The DPFC is based on a pair of spatially offset chirped Bragg gratings and has a response with varying free spectral range. The spectral shaper is used to filter broadband pulses from a mode-locked fiber laser, and CMPs are obtained at the output of a photodetector following a wavelength-to-time mapping process in a dispersive medium. We generate CMPs with a central frequency of up to 20 GHz, a radio-frequency (RF) chirp of 0.012 GHz/ps, and a time-bandwidth product of 14.5.
Keywords :
fibre lasers; laser cavity resonators; laser mode locking; microwave photonics; optical pulse generation; optical pulse shaping; photodetectors; silicon-on-insulator; Si; broadband pulses; chirped microwave pulses; dispersive medium; free spectral range; integrated distributed Fabry-Perot cavity; mode-locked fiber laser; photodetector; photonic generation; radio-frequency chirp; silicon-on-insulator; spatially offset chirped Bragg gratings; spectral shaper; time-bandwidth product; wavelength-to-time mapping process; Bandwidth; Bragg gratings; Chirp; Gratings; Microwave photonics; Radio frequency; Chirped microwave pulse generation; microwave photonics; silicon photonics;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2417868
