Abstract

Results of the first experimental demonstration of the recently proposed technique for improvement of the pump absorption in double-clad fibers by their simultaneous coiling and twisting are reported. The peak absorption (14 dB) of 3-m long hexagonal thulium-doped fiber was increased by 8 dB by its simultaneous coiling and twisting. Explanation of the effect is given by numerical modelling of the pump absorption in hexagonal and panda-type double-clad fibers. Improvement of fiber laser performance was also proved. The slope efficiency increased from 19.6% of the straight fiber to 23.9% of the coiled only fiber and 29.4% of the simultaneously coiled and twisted fiber.

© 2016 Optical Society of America

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References

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  1. M. N. Zervas and C. A. Codemard, “High power fiber lasers: a review,” IEEE J. Sel. Top. Quantum Electron. 20(5), 219–241 (2014).
    [Crossref]
  2. D. Kouznetsov and J. V. Moloney, “Efficiency of pump absorption in double-clad fiber amplifiers. II. Broken circular symmetry,” J. Opt. Soc. Am. B 19(6), 1259–1263 (2002).
    [Crossref]
  3. P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).
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    [Crossref] [PubMed]
  5. V. Doya, O. Legrand, F. Mortessagne, and C. Miniatura, “Speckle statistics in a chaotic multimode fiber,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 65(5), 056223 (2002).
    [Crossref] [PubMed]
  6. C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
    [Crossref]
  7. Y. Li, S. D. Jackson, and S. Fleming, “High absorption and low splice loss properties of hexagonal double-clad fiber,” IEEE Photon. Technol. Lett. 16(11), 2502–2504 (2004).
    [Crossref]
  8. P. Peterka and V. Doya, “Double-clad fiber amplifier with direct coupling of the pump and signal into the active fiber: modelling of multimode pump propagation,” presented at the Workshop of the COST Action 299 Optical fibers for new challenges facing the information society, Berlin, Germany, 5–7 February 2008.
  9. P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
    [Crossref]
  10. P. Koška and P. Peterka, “Numerical analysis of pump propagation and absorption in specially tailored double-clad rare-earth doped fiber,” Opt. Quantum Electron. 47(9), 3181–3191 (2015).
    [Crossref]
  11. P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
    [Crossref]
  12. P. Koška, P. Peterka and V. Doya, “Numerical modeling of pump absorption in coiled and twisted double-clad fibers,” IEEE J. Sel. Top. Quantum Electron. 22(2), (in press).
  13. P. Koška, P. Peterka, J. Aubrecht, O. Podrazký, F. Todorov, Y. Baravets, P. Honzátko, and I. Kašík, “Enhanced pump absorption efficiency in coiled and twisted double-clad thulium-doped fibers,” in Advanced Solid State Lasers, OSA Technical Digest (online) (Optical Society of America, 2015), paper ATu2A.23.
  14. M. Becker, J. Bergmann, S. Brückner, M. Franke, E. Lindner, M. W. Rothhardt, and H. Bartelt, “Fiber Bragg grating inscription combining DUV sub-picosecond laser pulses and two-beam interferometry,” Opt. Express 16(23), 19169–19178 (2008).
    [Crossref] [PubMed]

2015 (2)

P. Koška and P. Peterka, “Numerical analysis of pump propagation and absorption in specially tailored double-clad rare-earth doped fiber,” Opt. Quantum Electron. 47(9), 3181–3191 (2015).
[Crossref]

P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
[Crossref]

2014 (1)

M. N. Zervas and C. A. Codemard, “High power fiber lasers: a review,” IEEE J. Sel. Top. Quantum Electron. 20(5), 219–241 (2014).
[Crossref]

2013 (1)

P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
[Crossref]

2008 (1)

2007 (1)

2004 (1)

Y. Li, S. D. Jackson, and S. Fleming, “High absorption and low splice loss properties of hexagonal double-clad fiber,” IEEE Photon. Technol. Lett. 16(11), 2502–2504 (2004).
[Crossref]

2003 (2)

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

2002 (2)

V. Doya, O. Legrand, F. Mortessagne, and C. Miniatura, “Speckle statistics in a chaotic multimode fiber,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 65(5), 056223 (2002).
[Crossref] [PubMed]

D. Kouznetsov and J. V. Moloney, “Efficiency of pump absorption in double-clad fiber amplifiers. II. Broken circular symmetry,” J. Opt. Soc. Am. B 19(6), 1259–1263 (2002).
[Crossref]

Alam, S.

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

Alvarez-Chavez, J. A.

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

Bartelt, H.

Becker, M.

Bergmann, J.

Brückner, S.

Clarkson, W. A.

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

Codemard, C. A.

M. N. Zervas and C. A. Codemard, “High power fiber lasers: a review,” IEEE J. Sel. Top. Quantum Electron. 20(5), 219–241 (2014).
[Crossref]

Doya, V.

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

V. Doya, O. Legrand, F. Mortessagne, and C. Miniatura, “Speckle statistics in a chaotic multimode fiber,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 65(5), 056223 (2002).
[Crossref] [PubMed]

Fleming, S.

Y. Li, S. D. Jackson, and S. Fleming, “High absorption and low splice loss properties of hexagonal double-clad fiber,” IEEE Photon. Technol. Lett. 16(11), 2502–2504 (2004).
[Crossref]

Franke, M.

Grudinin, A. B.

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

Honzátko, P.

P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
[Crossref]

Jackson, S. D.

Y. Li, S. D. Jackson, and S. Fleming, “High absorption and low splice loss properties of hexagonal double-clad fiber,” IEEE Photon. Technol. Lett. 16(11), 2502–2504 (2004).
[Crossref]

Kašík, I.

P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
[Crossref]

P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
[Crossref]

Koška, P.

P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
[Crossref]

P. Koška and P. Peterka, “Numerical analysis of pump propagation and absorption in specially tailored double-clad rare-earth doped fiber,” Opt. Quantum Electron. 47(9), 3181–3191 (2015).
[Crossref]

P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
[Crossref]

Kouznetsov, D.

Legrand, O.

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

V. Doya, O. Legrand, F. Mortessagne, and C. Miniatura, “Speckle statistics in a chaotic multimode fiber,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 65(5), 056223 (2002).
[Crossref] [PubMed]

Leproux, P.

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

Li, Y.

Y. Li, S. D. Jackson, and S. Fleming, “High absorption and low splice loss properties of hexagonal double-clad fiber,” IEEE Photon. Technol. Lett. 16(11), 2502–2504 (2004).
[Crossref]

Lindner, E.

Matejec, V.

P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
[Crossref]

Miniatura, C.

V. Doya, O. Legrand, F. Mortessagne, and C. Miniatura, “Speckle statistics in a chaotic multimode fiber,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 65(5), 056223 (2002).
[Crossref] [PubMed]

Moloney, J. V.

Mortensen, N. A.

Mortessagne, F.

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

V. Doya, O. Legrand, F. Mortessagne, and C. Miniatura, “Speckle statistics in a chaotic multimode fiber,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 65(5), 056223 (2002).
[Crossref] [PubMed]

Nilsson, C. J.

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

Pagnoux, D.

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

Peterka, P.

P. Koška and P. Peterka, “Numerical analysis of pump propagation and absorption in specially tailored double-clad rare-earth doped fiber,” Opt. Quantum Electron. 47(9), 3181–3191 (2015).
[Crossref]

P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
[Crossref]

P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
[Crossref]

Podrazký, O.

P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
[Crossref]

P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
[Crossref]

Rothhardt, M. W.

Roy, P.

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

Turner, P. W.

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

Zervas, M. N.

M. N. Zervas and C. A. Codemard, “High power fiber lasers: a review,” IEEE J. Sel. Top. Quantum Electron. 20(5), 219–241 (2014).
[Crossref]

IEEE J. Quantum Electron. (1)

C. J. Nilsson, S. Alam, J. A. Alvarez-Chavez, P. W. Turner, W. A. Clarkson, and A. B. Grudinin, “High-power and tunable operation of erbium-ytterbium co-doped cladding-pumped fiber lasers,” IEEE J. Quantum Electron. 39(8), 987–994 (2003).
[Crossref]

IEEE J. Sel. Top. Quantum Electron. (1)

M. N. Zervas and C. A. Codemard, “High power fiber lasers: a review,” IEEE J. Sel. Top. Quantum Electron. 20(5), 219–241 (2014).
[Crossref]

IEEE Photon. Technol. Lett. (1)

Y. Li, S. D. Jackson, and S. Fleming, “High absorption and low splice loss properties of hexagonal double-clad fiber,” IEEE Photon. Technol. Lett. 16(11), 2502–2504 (2004).
[Crossref]

J. Opt. Soc. Am. B (1)

Opt. Commun. (1)

P. Leproux, V. Doya, P. Roy, D. Pagnoux, F. Mortessagne, and O. Legrand, “Experimental study of pump power absorption along rare-earth-doped double clad optical fibres,” Opt. Commun. 218(4–6), 249–254 (2003).

Opt. Express (2)

Opt. Quantum Electron. (1)

P. Koška and P. Peterka, “Numerical analysis of pump propagation and absorption in specially tailored double-clad rare-earth doped fiber,” Opt. Quantum Electron. 47(9), 3181–3191 (2015).
[Crossref]

Phys. Rev. E Stat. Nonlin. Soft Matter Phys. (1)

V. Doya, O. Legrand, F. Mortessagne, and C. Miniatura, “Speckle statistics in a chaotic multimode fiber,” Phys. Rev. E Stat. Nonlin. Soft Matter Phys. 65(5), 056223 (2002).
[Crossref] [PubMed]

Proc. SPIE (2)

P. Peterka, P. Honzátko, P. Koška, O. Podrazký, and I. Kašík, “Transient-fiber-Bragg grating spectra in self-swept Fabry-Perot fiber lasers,” Proc. SPIE 9344, 934423 (2015).
[Crossref]

P. Koška, P. Peterka, I. Kašík, V. Matějec, and O. Podrazký, “Double-clad rare-earth-doped fiber with cross-section tailored for splicing to the pump and signal fibers: analysis of pump propagation,” Proc. SPIE 8775, 87750V (2013).
[Crossref]

Other (3)

P. Peterka and V. Doya, “Double-clad fiber amplifier with direct coupling of the pump and signal into the active fiber: modelling of multimode pump propagation,” presented at the Workshop of the COST Action 299 Optical fibers for new challenges facing the information society, Berlin, Germany, 5–7 February 2008.

P. Koška, P. Peterka and V. Doya, “Numerical modeling of pump absorption in coiled and twisted double-clad fibers,” IEEE J. Sel. Top. Quantum Electron. 22(2), (in press).

P. Koška, P. Peterka, J. Aubrecht, O. Podrazký, F. Todorov, Y. Baravets, P. Honzátko, and I. Kašík, “Enhanced pump absorption efficiency in coiled and twisted double-clad thulium-doped fibers,” in Advanced Solid State Lasers, OSA Technical Digest (online) (Optical Society of America, 2015), paper ATu2A.23.

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Figures (5)

Fig. 1
Fig. 1 Coiling methods for improving pump absorption in double-clad rare-earth-doped fibers: kidney shape of the spool (a) and simultaneous twisting and coiling of the fiber on a round spool (b).
Fig. 2
Fig. 2 793 nm pump-field distribution at the input and three other longitudinal positions along hexagonal fiber coiled on 3-cm radius spool and twisted with rate 1°/mm. One particular corner of the rotating hexagon is labeled with a star.
Fig. 3
Fig. 3 Numerical modelling of pump absorption efficiency along hexagonal fiber (a) and panda fiber (b) for various coiling conditions.
Fig. 4
Fig. 4 Setup of the experimental fiber laser.
Fig. 5
Fig. 5 (a) Difference of the pump absorption between the simultaneously coiled and twisted fiber and coiled only fiber for 3 m long hexagonal fiber. (b) Fiber laser characteristics for different coiling condition of 107 cm long hexagonal fiber.

Tables (1)

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Table 1 Parameters of the fibers in the simulations and experiment

Equations (2)

Equations on this page are rendered with MathJax. Learn more.

Im( n core )= λ 4π α ,
α= σ a Tm N Tm k ρ(Si O 2 ) m(Si O 2 ) ,

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