An optical frequency synthesizer using a waveguide-type optical frequency comb generator at 1.5-μm wavelength

Integral Order Photonic RF Signal Processors Based on Kerr Micro-combs

“…They offer a much higher number of wavelengths than typically is available through EO combs, together with a wide range of comb spacings (free spectral range (FSR)) including ultralarge FSRs, as well as greatly reduced footprint and complexity. Micro-combs have enabled many fundamental breakthroughs [50] including ultrahigh capacity communications [77][78][79], neural networks [80][81][82], complex quantum state generation [83][84][85][86][87][88][89][90][91][92][93][94][95][96][97] and much more. In particular, micro-combs have proven to be very powerful tools for a wide range of RF applications such as optical true time delays [31], transversal filters [34,38], signal processors [29,32], channelizers [37] and others [15, 18, 26-28, 36, 39-41].…”

Integral order photonic RF and microwave signal processors based on Kerr micro-combs

“…They offer a much higher number of wavelengths than typically is available through EO combs, together with a wide range of comb spacings (free spectral range (FSR)) including ultra-large FSRs, as well as greatly reduced footprint and complexity. Micro-combs have enabled many fundamental breakthroughs [50] including ultrahigh capacity communications [77][78][79], neural networks [80][81][82], complex quantum state generation [83][84][85][86][87][88][89][90][91][92][93][94][95][96][97] and much more. In particular, microcombs have proven to be very powerful tools for a wide range of RF applications such as optical true time delays [31], transversal lters [34,38], signal processors [29,32], channelizers [37] and others [15, 18, 26-28, 36, 39-41].…”

Photonic RF and microwave spectral filters based on transversal filters with Kerr microcombs

“…Alternative approaches, including those based on optical frequency comb sources achieved by electrooptic (EO) modulation, can help mitigate this problem, but they require cascaded high frequency EO [97][98][99] or Fabry-Perot EO [100] modulators that in turn require high-frequency RF sources. Of these approaches, EO comb-based methods have been in use the longest and have demonstrated many powerful functions.…”