Title :
Chirped Microwave Pulse Generation Using an Integrated SiP Bragg Grating in a Sagnac Loop
Author :
Junjia Wang ; Ashrafi, Reza ; Rochette, Martin ; Chen, Lawrence R.
Author_Institution :
Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada
Abstract :
We demonstrate an integrated spectral shaper based on a Sagnac loop incorporating a chirped Bragg grating in silicon photonics for the photonic generation of chirped microwave pulses. The technique is based on optical spectral shaping combined with linear frequency-to-time mapping. By tuning the central wavelength of the input optical pulse, we obtain chirped microwave pulses with central frequencies ranging from ~10 GHz to ~30 GHz and an RF chirp rate of ~20 GHz/ns with both positive and negative signs.
Keywords :
Bragg gratings; Sagnac interferometers; elemental semiconductors; integrated optics; microwave photonics; optical pulse generation; optical pulse shaping; optical tuning; silicon; RF chirp rate; Sagnac loop; Si; central wavelength tuning; chirped Bragg grating; chirped microwave pulse generation; input optical pulse; integrated SiP Bragg grating; integrated spectral shaper; linear frequency-to-time mapping; optical spectral shaping; photonic generation; silicon photonics; Chirp; Microwave filters; Microwave imaging; Microwave oscillators; Microwave photonics; Silicon photonics; chirped microwave pulse generation; frequency-to-time mapping; integrated waveguide Bragg gratings; microwave photonics; optical spectral shaping;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2444275
