TY  - JOUR
AU  - Fan, Weichen
AU  - Ayhan, Furkan
AU  - Wildi, Thibault
AU  - Volkov, Mikhail
AU  - Seer, Ali
AU  - Ludwig, Markus
AU  - Voumard, Thibault
AU  - Brodschelm, Andreas
AU  - Brasch, Victor
AU  - Villanueva, Guillermo L.
AU  - Herr, Tobias
TI  - Spectral dynamics in broadband frequency combs with overlapping harmonics
JO  - Physical review letters
VL  - 135
IS  - 21
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2025-00903
SP  - 213801
PY  - 2025
AB  - 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 ultra-broadband 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 transform into a single evenly spaced ultra-broadband frequency comb when the initial comb is offset-free.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/kgd7-52hy
UR  - https://bib-pubdb1.desy.de/record/624698
ER  -