Electrically tunable resonant filters in phase-shifted contra-directional couplers
Publication Type:Conference Paper
Source:IEEE Group IV Photonics Conference, p.78-80 (2012)
We demonstrate an electrically tunable resonant filter with FSR-free operation using a silicon photonic quarter-wavelength phase-shifted, grating-assisted contra-directional coupler. The spectrum shows a stop-band of 7nm, an extinction of 24dB, and a Q of 7,000.