Spectral Dynamics in Broadband Frequency Combs with Overlapping Harmonics
No Thumbnail Available
Author
Fan, Weichen
Ayhan, Furkan
Wildi, Thibault
Volkov, Mikhail
Seer, Ali
Ludwig, Markus
Voumard, Thibault
Brodschelm, Andreas
Brasch, Victor
Villanueva, Luis Guillermo
DOI
10.1103/kgd7-52hy
Abstract
Optical frequency combs and their spectra of evenly spaced discrete laser lines are essential to modern time and frequency metrology. Recent advances in integrated photonic waveguides enable efficient nonlinear broadening of an initially narrowband frequency comb to multi-octave bandwidth. Here, we study the nonlinear dynamics in the generation of such ultrabroadband spectra where different harmonics of the comb can overlap. We show that a set of interleaved combs with different offset frequencies extending across the entire spectrum can emerge, which can be arranged into a practically evenly spaced ultrabroadband frequency comb when the initial comb is offset-free.
Publication Reference
Physical Review Letters, vol. 135 (21), pp. 213801
Year
2025-11-21