Title :
A bandwidth-tunable flat-top optical filter based on a single reflective-type microring resonator
Author :
Menghao Huang ; Simin Li ; Lugang Wu ; Shilong Pan
Author_Institution :
Key Lab. of Radar Imaging & Microwave Photonics, Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
Abstract :
An optical filter with flat-top spectral response and tunable bandwidth is proposed and numerically demonstrated based on a single reflective-type microring resonator (MRR). The reflective-type MRR consists of a MRR and a reflector in the drop port of the MRR, which is equivalent to two cascaded rings with one creates a strong passband response and the other one produces a weak notch response. The combination of the two responses leads to a flat-top bandpass response. By adjusting the coupling coefficients of the two optical couplers in the MRR, the 1-dB bandwidth can be continuously tuned from 0.025 to 0.121 nm for a reflective-type MRR with a radius of 100 μm, while the insertion loss is varied within 0.63 dB.
Keywords :
band-pass filters; integrated optics; micromechanical resonators; optical filters; optical tuning; bandwidth-tunable flat-top optical filter; cascaded rings; coupling coefficients; flat-top spectral response; insertion loss; notch response; optical couplers; passband response; radius 100 mum; single reflective-type microring resonator; tunable bandwidth; Bandwidth; Couplings; Integrated optics; Optical filters; Optical resonators; Ports (Computers); Resonator filters; Microring resonator; integrated optics; optical flat-top filter;
Conference_Titel :
Optical Communications and Networks (ICOCN), 2015 14th International Conference on
Conference_Location :
Nanjing
DOI :
10.1109/ICOCN.2015.7203604
