Research output: Contribution to journal › Article › peer-review
Mode-locked fibre lasers with an adjustable drop-shaped cavity. / Nyushkov, B. N.; Kobtsev, S. M.; Koliada, N. A. et al.
In: Laser Physics Letters, Vol. 14, No. 11, 115101, 01.11.2017.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Mode-locked fibre lasers with an adjustable drop-shaped cavity
AU - Nyushkov, B. N.
AU - Kobtsev, S. M.
AU - Koliada, N. A.
AU - Antropov, A. A.
AU - Pivtsov, V. S.
AU - Yakovlev, A. V.
N1 - Publisher Copyright: © 2017 Astro Ltd.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - We report the first implementation of a new cavity topology for mode-locked fibre lasers. This new 'drop-shaped' cavity topology employs a dual-fibre optical collimator and allows for a relatively simple cavity design with continuously adjustable length. It combines the advantages of the conventional ring cavity topology with the adjustment capabilities of hybrid ring-linear cavities (e.g. σ-cavities). Reliable femtosecond pulsed lasing was demonstrated in the experimental drop-shaped Er-doped fibre lasers, which were mode-locked in two different ways - by exploiting nonlinear polarisation evolution (NPE) and by means of a semiconductor saturable absorber. In the case of NPE-based mode locking, the shortest pulse duration was ∼450 fs. The pulse repetition rate could be continuously varied within 3 kHz around ∼25 MHz in the NPE-mode-locked lasers when the distance between the dual-fibre optical collimator and the cavity mirror was adjusted. This feature could, in principle, allow active stabilisation of the pulse repetition rate. Thus, mode-locked fibre lasers with the proposed drop-shaped cavity topology could be applied in metrology and other fields where a high stability of pulse repetition rate or its synchronization with an external clock is required.
AB - We report the first implementation of a new cavity topology for mode-locked fibre lasers. This new 'drop-shaped' cavity topology employs a dual-fibre optical collimator and allows for a relatively simple cavity design with continuously adjustable length. It combines the advantages of the conventional ring cavity topology with the adjustment capabilities of hybrid ring-linear cavities (e.g. σ-cavities). Reliable femtosecond pulsed lasing was demonstrated in the experimental drop-shaped Er-doped fibre lasers, which were mode-locked in two different ways - by exploiting nonlinear polarisation evolution (NPE) and by means of a semiconductor saturable absorber. In the case of NPE-based mode locking, the shortest pulse duration was ∼450 fs. The pulse repetition rate could be continuously varied within 3 kHz around ∼25 MHz in the NPE-mode-locked lasers when the distance between the dual-fibre optical collimator and the cavity mirror was adjusted. This feature could, in principle, allow active stabilisation of the pulse repetition rate. Thus, mode-locked fibre lasers with the proposed drop-shaped cavity topology could be applied in metrology and other fields where a high stability of pulse repetition rate or its synchronization with an external clock is required.
KW - fibre lasers
KW - mode locking
KW - optical resonators
KW - MANAGEMENT
KW - SOLITON LASER
KW - NONLINEAR POLARIZATION EVOLUTION
KW - REPETITION RATE CONTROL
KW - LOCKING
KW - PULSES
KW - ERBIUM LASER
KW - MASTER OSCILLATOR
KW - GENERATION
KW - RING CAVITY
UR - http://www.scopus.com/inward/record.url?scp=85039980571&partnerID=8YFLogxK
U2 - 10.1088/1612-202X/aa89b6
DO - 10.1088/1612-202X/aa89b6
M3 - Article
AN - SCOPUS:85039980571
VL - 14
JO - Laser Physics Letters
JF - Laser Physics Letters
SN - 1612-2011
IS - 11
M1 - 115101
ER -
ID: 9080179