Abstract. Exceptional points (EPs) are branch-point singularities in non-Hermitian systems where eigenvalues and eigenvectors coalesce [1]. Microcavity lasers enable fine control of gain and loss, making them an ideal platform for steady-state EP operation and EP-enabled functionalities such as enhanced sensing, mode selectivity, and chiral emission. Recent work shows [2], near an EP, two nearly degenerate modes in a semiconductor laser produce gain-followed beating that dynamically modulates the carrier inversion, enabling spontaneous OFC generation above threshold. EP OFC has a repetition rate not constrained by the cavity free spectral range, enabling wide repetition-rate tunability in a compact cavity.

Линь Ц. (науч. рук. Ковалев А.В.) Simulation of the effects of geometry and gain loss control on dynamic gain and ep optical frequency comb in a exceptional point laser // Сборник тезисов докладов конгресса молодых ученых. Электронное издание. – СПб: Университет ИТМО, [2026]. URL: https://kmu.itmo.ru/digests/article/17206