TY - JOUR

T1 - Stable coherent mode-locking based on π pulse formation in single-section lasers

AU - Arkhipov, Rostislav

AU - Pakhomov, Anton

AU - Arkhipov, Mikhail

AU - Babushkin, Ihar

AU - Rosanov, Nikolay

N1 - Funding Information: Open Access funding enabled and organized by Projekt DEAL. R.A. thanks Russian Science Foundation, project 19-72-00012 (analytical results, numerical simulations and theory of few-cycle pulse generation in laser with short cavity). I.B. thanks Deutsche Forschungsgemeinschaft (DFG), project BA 4156/4-2, as well as Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453). Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/1/13

Y1 - 2021/1/13

N2 - Here we consider coherent mode-locking (CML) regimes in single-section cavity lasers, taking place for pulse durations less than atomic population and phase relaxation times, which arise due to coherent Rabi oscillations of the atomic inversion. Typically, CML is introduced for lasers with two sections, the gain and absorber ones. Here we show that, for certain combination of the cavity length and relaxation parameters, a very stable CML in a laser, containing only gain section, may arise. The mode-locking is unconditionally self-starting and appears due to balance of intra-pulse de-excitation and slow interpulse-scale pump-induced relaxation processes. We also discuss the scaling of the system to shorter pulse durations, showing a possibility of mode-locking for few-cycle pulses.

AB - Here we consider coherent mode-locking (CML) regimes in single-section cavity lasers, taking place for pulse durations less than atomic population and phase relaxation times, which arise due to coherent Rabi oscillations of the atomic inversion. Typically, CML is introduced for lasers with two sections, the gain and absorber ones. Here we show that, for certain combination of the cavity length and relaxation parameters, a very stable CML in a laser, containing only gain section, may arise. The mode-locking is unconditionally self-starting and appears due to balance of intra-pulse de-excitation and slow interpulse-scale pump-induced relaxation processes. We also discuss the scaling of the system to shorter pulse durations, showing a possibility of mode-locking for few-cycle pulses.

UR - http://www.scopus.com/inward/record.url?scp=85099419044&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/0c86b96d-6d5b-35b6-8260-9edc4de19744/

U2 - 10.1038/s41598-020-80775-3

DO - 10.1038/s41598-020-80775-3

M3 - Article

AN - SCOPUS:85099419044

VL - 11

JO - Scientific Reports

JF - Scientific Reports

SN - 2045-2322

IS - 1

M1 - 1147

ER -