Numerical modelling of pump absorption in coiled and twisted double-clad fiber: a prospect for tandem pumped fiber laser

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F20%3A00540936" target="_blank" >RIV/67985882:_____/20:00540936 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1117/12.2557230" target="_blank" >https://doi.org/10.1117/12.2557230</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2557230" target="_blank" >10.1117/12.2557230</a>

Result language

angličtina

Original language name

Numerical modelling of pump absorption in coiled and twisted double-clad fiber: a prospect for tandem pumped fiber laser

Original language description

The high-power operation of fiber lasers was enabled mainly by the invention of cladding pumping within a double-clad fiber structure. Various cross-sectional shapes of double-clad fibers as well as unconventional coiling methods have been investigated both experimentally and theoretically in order to enhance the absorption of the multimode-pump. With enhanced pump absorption efficiency, the double-clad fiber of shorter length can be used in the fiber devices and in such a way the unwanted effects of background losses and nonlinear effects can be mitigated. In this paper we report on numerical modelling of optical pump absorption in double-clad octagonal active fiber of different fiber geometry and layouts. Namely we investigate the effect of the bending radii, twist rate of the fiber, doped core area (holmium is considered in this as a doping ion) and pump beam shape. The numerical model is based on FEM-BPM method. The optimized geometries and layouts shall finally result in a highly efficient laser of small footprint without the need of water cooling with great potential for application with low power consumption, tightly limited space and weight requirements. Optimized design will also minimize risk of damage of the fiber during operation of the fiber laser

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

<a href="/en/project/GA19-03141S" target="_blank" >GA19-03141S: Research of novel geometries and layouts of double-clad rare-earth-doped fibers for high power fiber lasers</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of SPIE

ISBN

978-1-5106-3483-1

ISSN

0277-786X

e-ISSN

1996-756X

Number of pages

6

Pages from-to

113550W

Publisher name

SPIE

Place of publication

BELLINGHAM

Event location

None

Event date

Apr 6, 2020

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000576761300021