Fig. 4: Optical frequency comb (OFC) generated by a uniform adiabatic modulation with amplitude exciding the bandwidth of the SNAP bottle microresonator (SBM).
From: Optimized frequency comb spectrum of parametrically modulated bottle microresonators
a Adiabatic modulation of the parabolic SBM (red line) with a uniform spatial distribution \(\xi \left(z/L\right)\) (green line). The maximum amplitude of the modulation is \({\delta \nu }_{{{\mbox{par}}}}=2\triangle {\nu }_{0}=40\) GHz. b The generated OFC has a bandwidth five times larger than that of the SBM, \({\triangle \nu }_{0}=20\) GHz. The number of comb lines generated are ~1000.
