“…Traditionally, this has been achieved via discrete laser arrays [16,[22][23][24] or FBG arrays [14][15], which, although offering advantages, have resulted in significantly increased complexity, as well as reduced performance due to a limited number of optical wavelengths and other factors. Alternative approaches, including those based on optical frequency comb (OFC) sources [12], can mitigate this problem, although they too can suffer from drawbacks such as the need for cascaded high frequency electro-optic (EO) [2,[25][26][27][28][29][30] and Fabry-Perot EO [31] modulators that in turn require high-frequency RF sources.…”