Open AccessSilicon photonic spiral shape resonator applied to the optoelectronic oscillator
Author(s) -
Do Phuong T.,
AlonsoRamos Carlos,
Le Roux Xavier,
Vivien Laurent,
MarrisMorini Delphine,
Crozat Paul,
LedouxRak Isabelle,
Cassan Eric,
Journet Bernard
Publication year - 2019
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2019.0020
Subject(s) - optoelectronics , resonator , materials science , photonics , spiral (railway) , silicon , whispering gallery wave , optics , physics , engineering , mechanical engineering
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.