Article in Optics Express by Boling Ouyang

“Silicon ring resonators with a free spectral range robust to fabrication variations” 

In the article a novel design method for silicon ring resonators is presented that yields a free spectral range robust to fabrication variations. The work provides an important extension of the generic design approach exploiting cancellation effects using two waveguides, which so far was limited to Mach-Zehnder interferometers. The method enables a more precise FSR value and well-aimed robust performance. Experimental results match the predictions very well, proving the validity of the method. The method will lead to improved performance of photonic integrated circuits using multiple ring resonators, while fabrication-process adjustments are not required.

To read the publication, go to: Optics Express Vol. 27 (26), pp. 38698-38707 (2019).