| Abstract: | By optimizing the gain configuration and length of the loop,a 90-tone optical frequency comb(OFC) is successfully generated based on recirculating frequency shifter structure. The peak-to-peak power fluctuation of the 90-tone OFC is 4.26 dB and the tone-to-noise ratio is higher than 19.17 dB. To further analyze the noise accumulation feature of the tones when travelling around the loop,linewidth of the tones is measured by delayed self-heterodyne interferometer structure. The result shows the linewidth of the tones deteriorates little during the recirculating process,indicating that the generated OFC is an ideal multi-wavelength source for high-speed communication systems. |
