Silicon photonic spiral shape resonator applied to the optoelectronic oscillator. Issue 6 (1st December 2019)

• Record Type: Journal Article
• Authors: Do, Phuong T.; Alonso‐Ramos, Carlos; Le Roux, Xavier; Vivien, Laurent; Marris‐Morini, Delphine; Crozat, Paul; Ledoux‐Rak, Isabelle; Cassan, Eric; Journet, Bernard
• Is Part Of: IET optoelectronics. Volume 13:Issue 6(2019)
• Page Start: 303
• Page End: 307
• Publication Date: 2019-12-01
• Subjects: elemental semiconductors -- microwave photonics -- radiofrequency amplifiers -- integrated optics -- optical resonators -- silicon -- photodetectors -- phase noise -- optical filters -- microwave oscillators -- Q-factor; silicon photonic spiral shape resonator -- optoelectronic oscillator -- optical comb -- silicon add-drop ring resonator -- millimeter-long silicon-on insulator microring resonator -- oscillation signal -- drop port -- add-drop silicon resonator -- optimised ring -- optical quality factor -- complete OEO loop yields -- millimeters long silicon rings -- low-noise microwave signals -- size 5.8 mm -- size 112.0 pm -- noise figure 20.0 dB -- frequency 14.12 GHz -- frequency 100.0 kHz -- Si; Optoelectronics -- Periodicals; 621.36
• DOI: 10.1049/iet-opt.2019.0020
• Languages: English
• ISSNs: 1751-8768

Abstract

Abstract : We present here the implementation of an optoelectronic oscillator (OEO) that leverages the optical comb produced by a silicon add‐drop ring resonator to directly convert signals from optical to microwave domain. The OEO comprises a CW laser, an intensity modulator, a silicon add‐drop ring, a photodetector, and radiofrequency amplifier. By using millimeter‐long silicon‐on insulator micro‐ring resonator, we generated an oscillation signal with a frequency determined by the free spectral range (FSR) of the ring. In this scheme, the sharp transmission peaks in the drop port of an add‐drop silicon resonator are used as the optical comb. The optimised ring has a length of 5.8 mm with a measured FSR of 112 pm, an extinction ratio of 20 dB and an optical quality factor of 2.2 × 10 5 . The complete OEO loop yields a 14.12 GHz signal with a phase noise level of −100 dBc/Hz at an offset of 100 kHz from the carrier. This result shows that OEOs directly based on millimeters long silicon rings are a promising path for generating low‐noise microwave signals.