Article (Scientific journals)
Double harmonic mode-locking in soliton fiber ring laser acquired through the resonant optoacoustic coupling
Ribenek, V.A.; Itrin, P.A.; Korobko, D.A. et al.
2024In APL Photonics, 9 (5)
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Keywords :
Cavity fibers; Fiber-ring lasers; Harmonic mode locking; High-frequency lasers; Laser operations; Low timing jitter; Passive harmonic mode-locking; Pulse stability; Resonance frequencies; Standard fibers; Atomic and Molecular Physics, and Optics; Computer Networks and Communications
Abstract :
[en] Passive harmonic mode-locking of a soliton fiber laser locked to optoacoustic resonance (OAR) in the cavity fiber ensures high-frequency laser operation, high pulse stability, and low timing jitter. However, the pulse repetition rate (PRR) of such lasers is limited to ∼1 GHz for standard fibers due to the available acoustic modes. Here, we address these limitations by demonstrating a soliton fiber laser built from standard fiber components and subjected to double harmonic mode-locking (DHML). As an example, the laser adjusted to operate at the 15th harmonic of its cavity matching the OAR at ∼199 MHz could be driven to operate at a high harmonic of this particular OAR frequency, thus reaching ∼12 GHz. This breakthrough is made possible through controllable optoacoustic interactions in a short, 50 cm segment of unjacketed cavity fiber. We propose that the precise alignment of the laser cavity harmonic and fiber acoustic modes leads to a long-lived narrow-band acoustic vibration. This vibration sets the pace for the pulses circulating in the cavity by suppressing modes that do not conform to the Vernier principle. The surviving modes, equally spaced by the OAR frequency, in cooperation with the gain depletion and recovery mechanism, facilitate the formation of stable high-frequency pulse sequences, enabling DHML. In this process, the OAR rather than the laser cavity defines the elementary step for laser PRR tuning. Throughout the entire PRR tuning range, the soliton fiber laser exhibits enhanced stability, demonstrating supermode suppression levels better than ∼40 dB and picosecond pulse timing jitter.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Ribenek, V.A. ;  Ulyanovsk State University, Ulyanovsk, Russian Federation
Itrin, P.A. ;  Ulyanovsk State University, Ulyanovsk, Russian Federation
Korobko, D.A. ;  Ulyanovsk State University, Ulyanovsk, Russian Federation
Fotiadi, Andrei  ;  Université de Mons - UMONS > Faculté Polytechnique > Service d'Electromagnétisme et Télécommunications ; Ulyanovsk State University, Ulyanovsk, Russian Federation
Language :
English
Title :
Double harmonic mode-locking in soliton fiber ring laser acquired through the resonant optoacoustic coupling
Publication date :
May 2024
Journal title :
APL Photonics
eISSN :
2378-0967
Publisher :
American Institute of Physics
Volume :
9
Issue :
5
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
F108 - Electromagnétisme et Télécommunications
Research institute :
R300 - Institut de Recherche en Technologies de l'Information et Sciences de l'Informatique
Funders :
Russian Science Foundation
Funding text :
This study was supported by the Russian Science Foundation (Grant No. 23-79-30017).
Available on ORBi UMONS :
since 03 July 2024

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