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Proceedings Paper

Wavelength flexible, kW-level narrow linewidth fibre laser based on 7GHz PRBS phase modulation
Author(s): W. Y. W. Lim; K. W. Seah; Y. E. Ye; B. S. Tan; C. P. Seah
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Paper Abstract

We report on the results of a narrow linewidth fibre laser with <1kW laser output. Pseudo-random bit sequence (PRBS) phase modulation at 6.9GHz was employed to suppress Stimulated Brillouin Scattering (SBS). The laser demonstrated wavelength tunable operation from 1036nm to 1071nm, with spectral purity exceeding 40dB over most of the range. A delivery fibre length of 3m was enabled by exploiting the short gain lengths in a customized 250μm cladding fibre design. Near diffraction limited beam quality of M2=1.19 was measured with no indication of transverse modal instability (TMI).

Paper Details

Date Published: 21 February 2020
PDF: 6 pages
Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 1126006 (21 February 2020); doi: 10.1117/12.2547482
Show Author Affiliations
W. Y. W. Lim, DSO National Labs. (Singapore)
K. W. Seah, DSO National Labs. (Singapore)
Y. E. Ye, DSO National Labs. (Singapore)
B. S. Tan, DSO National Labs. (Singapore)
C. P. Seah, DSO National Labs. (Singapore)

Published in SPIE Proceedings Vol. 11260:
Fiber Lasers XVII: Technology and Systems
Liang Dong, Editor(s)

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