Abstract

The results of theoretical and experimental studies of active tapered double-clad fibers, intending the optimization of its imperative parameters - tapering ratio, longitudinal profile, core/cladding diameters ratio, are presented. Using a refined taper geometry we have demonstrated power scaling of a ytterbium fiber laser pumped by low-brightness, cost-effective laser diodes up to 750 W, with 80% efficiency.

© 2010 OSA

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References

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  1. V. Filippov, Y. Chamorovskii, J. Kerttula, K. Golant, M. Pessa, and O. G. Okhotnikov, “Double clad tapered fiber for high power applications,” Opt. Express 16(3), 1929–1944 (2008), http://www.opticsinfobase.org/abstract.cfm?URI=oe-16-3-1929 .
    [CrossRef] [PubMed]
  2. V. Filippov, Y. Chamorovskii, J. Kerttula, A. Kholodkov, and O. G. Okhotnikov, “Single-mode 212 W tapered fiber laser pumped by a low-brightness source,” Opt. Lett. 33(13), 1416–1418 (2008).
    [CrossRef] [PubMed]
  3. V. Filippov, Y. Chamorovskii, J. Kerttula, A. Kholodkov, and O. G. Okhotnikov, “High power tapered ytterbium fiber laser pumped by a low-brightness source,” Europhoton 2008, Paris.
  4. V. Filippov, Y. Chamorovskii, J. Kerttula, A. Kholodkov, and O. G. Okhotnikov, “600 W power scalable single transverse mode tapered double-clad fiber laser,” Opt. Express 17(3), 1203–1214 (2009), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-3-1203 .
    [CrossRef] [PubMed]
  5. J. A. Alvarez-Chavez, A. B. Grudinin, J. Nilsson, P. W. Turner, and W. A. Clarkson, “Mode selection in high power cladding pumped fibre lasers with tapered section,” in Conference on Laser and Electro-Optics, OSA Technical Digest (Optical Society of America, 1999), pp. 247–248.
  6. J. D. Minelly, L. Zenteno, M. J. Dejneka, W. J. Miller, D. V. Kuksenkov, M. K. Davis, S. G. Crigler, and M. E. Bardo, “High power diode pumped single-transverse-mode Yb fiber laser operating at 976 nm,” in Dig. Optical Fiber Communication Conf., 2000, postdeadline paper PD2, vol.4, pp. 172–174.
  7. M. J. Dejneka, J. D. Minelly, and L. Zenteno, “Tapered fiber laser,” US patent # 6.324.326 B1 (2001).
  8. M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
    [CrossRef]
  9. H. Jeong, S. Choi, and K. Oh, “Continuous wave single transverse mode laser oscillation in a Nd-doped large core double clad fiber cavity with concatenated adiabatic tapers,” Opt. Commun. 213(1–3), 33–37 (2002).
    [CrossRef]
  10. L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
    [CrossRef]
  11. T. A. Birks and Y. W. Li, “The shape of fiber tapers,” J. Lightwave Technol. 10(4), 432–438 (1992).
    [CrossRef]
  12. D. Marcuse, “Light transmission optics,” Van Nostrand Reinhold Company, New York, chapter 8, (1972).
  13. K. M. Golant, “Surface plasma chemical vapor deposition: 20 years of application in glass synthesis for lightguides (a review)”, XXI International Congress on Glass, Strasbourg, July 1–6, 2007, Proc. on CD ROM, paper L13.

2009 (1)

2008 (3)

2002 (2)

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

H. Jeong, S. Choi, and K. Oh, “Continuous wave single transverse mode laser oscillation in a Nd-doped large core double clad fiber cavity with concatenated adiabatic tapers,” Opt. Commun. 213(1–3), 33–37 (2002).
[CrossRef]

1992 (1)

T. A. Birks and Y. W. Li, “The shape of fiber tapers,” J. Lightwave Technol. 10(4), 432–438 (1992).
[CrossRef]

Allan, D. C.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

Birks, T. A.

T. A. Birks and Y. W. Li, “The shape of fiber tapers,” J. Lightwave Technol. 10(4), 432–438 (1992).
[CrossRef]

Chamorovskii, Y.

Choi, S.

H. Jeong, S. Choi, and K. Oh, “Continuous wave single transverse mode laser oscillation in a Nd-doped large core double clad fiber cavity with concatenated adiabatic tapers,” Opt. Commun. 213(1–3), 33–37 (2002).
[CrossRef]

Crigler, S. G.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

Dejneka, M. J.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

Dong, J.

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

Du, S.

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

Filippov, V.

Golant, K.

Hanson, B. Z.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

He, B.

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

Jeong, H.

H. Jeong, S. Choi, and K. Oh, “Continuous wave single transverse mode laser oscillation in a Nd-doped large core double clad fiber cavity with concatenated adiabatic tapers,” Opt. Commun. 213(1–3), 33–37 (2002).
[CrossRef]

Kerttula, J.

Kholodkov, A.

Kuksenkov, D.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

Li, L.

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

Li, Y. W.

T. A. Birks and Y. W. Li, “The shape of fiber tapers,” J. Lightwave Technol. 10(4), 432–438 (1992).
[CrossRef]

Lou, Q.

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

Miller, W. J.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

Minelly, J. D.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

Oh, K.

H. Jeong, S. Choi, and K. Oh, “Continuous wave single transverse mode laser oscillation in a Nd-doped large core double clad fiber cavity with concatenated adiabatic tapers,” Opt. Commun. 213(1–3), 33–37 (2002).
[CrossRef]

Okhotnikov, O. G.

Pessa, M.

Wei, Y.

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

Zenteno, L.

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

Zhou, J.

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

J. Am. Ceram. Soc. (1)

M. J. Dejneka, B. Z. Hanson, S. G. Crigler, L. Zenteno, J. D. Minelly, D. C. Allan, W. J. Miller, and D. Kuksenkov, “La2O3-Al2O3-SiO2 glasses for high-power, Yb3+-doped 980-nm fiber lasers,” J. Am. Ceram. Soc. 85, 1100–1106 (2002).
[CrossRef]

J. Lightwave Technol. (1)

T. A. Birks and Y. W. Li, “The shape of fiber tapers,” J. Lightwave Technol. 10(4), 432–438 (1992).
[CrossRef]

Opt. Commun. (2)

H. Jeong, S. Choi, and K. Oh, “Continuous wave single transverse mode laser oscillation in a Nd-doped large core double clad fiber cavity with concatenated adiabatic tapers,” Opt. Commun. 213(1–3), 33–37 (2002).
[CrossRef]

L. Li, Q. Lou, J. Zhou, J. Dong, Y. Wei, S. Du, and B. He, “High power single transverse mode operation of tapered large-mode-area fiber laser,” Opt. Commun. 281(4), 655–657 (2008).
[CrossRef]

Opt. Express (2)

Opt. Lett. (1)

Other (6)

J. A. Alvarez-Chavez, A. B. Grudinin, J. Nilsson, P. W. Turner, and W. A. Clarkson, “Mode selection in high power cladding pumped fibre lasers with tapered section,” in Conference on Laser and Electro-Optics, OSA Technical Digest (Optical Society of America, 1999), pp. 247–248.

J. D. Minelly, L. Zenteno, M. J. Dejneka, W. J. Miller, D. V. Kuksenkov, M. K. Davis, S. G. Crigler, and M. E. Bardo, “High power diode pumped single-transverse-mode Yb fiber laser operating at 976 nm,” in Dig. Optical Fiber Communication Conf., 2000, postdeadline paper PD2, vol.4, pp. 172–174.

M. J. Dejneka, J. D. Minelly, and L. Zenteno, “Tapered fiber laser,” US patent # 6.324.326 B1 (2001).

D. Marcuse, “Light transmission optics,” Van Nostrand Reinhold Company, New York, chapter 8, (1972).

K. M. Golant, “Surface plasma chemical vapor deposition: 20 years of application in glass synthesis for lightguides (a review)”, XXI International Congress on Glass, Strasbourg, July 1–6, 2007, Proc. on CD ROM, paper L13.

V. Filippov, Y. Chamorovskii, J. Kerttula, A. Kholodkov, and O. G. Okhotnikov, “High power tapered ytterbium fiber laser pumped by a low-brightness source,” Europhoton 2008, Paris.

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Figures (9)

Fig. 1
Fig. 1

Near-paraxial fraction of pump power P p a r a x p u m p as function of tapering ratio.

Fig. 2
Fig. 2

Various axial taper profiles: (1) - “step-like” shape; (2) – bowl-shaped; (3) – “convex”.

Fig. 3
Fig. 3

Arbitrary shaped taper approximated by a sequence of N short-length linear tapers.

Fig. 4
Fig. 4

Parabolic shapes of tapered fiber for different values of the shape factor b .

Fig. 5
Fig. 5

Vignetted pump power as a function of the taper shape factor b .

Fig. 6
Fig. 6

Vignetted pump power versus paraxial pump absorption.

Fig. 7
Fig. 7

Longitudinal profiles of experimental T-DCFs: solid lines – experimentally measured, dashed lines – parabolic fit. Inset: refractive index profile of the all-silica Yb-doped alumosilicate-core/F-doped-silica-cladding fiber preform synthesized with the help of SPCVD

Fig. 8
Fig. 8

Experimental setup.

Fig. 9
Fig. 9

Output power as function of launched pump power.

Tables (2)

Tables Icon

Table 1 Parameters of T-DCF

Tables Icon

Table 2 Parameters of lasers with T-DCF

Equations (12)

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K D C F = S A c l a d A c o r e ( N A c l a d N A c o r e ) 2 = S ( D c l a d N A c l a d D c o r e N A c o r e ) 2 ,
K T D C F = S A c l a d _ i n p u t A c o r e _ o u t p u t ( N A l a u n c h N A c o r e ) 2 = S ( T D c l a d _ o u t p u t N A l a u n c h D c o r e _ o u t p u t N A c o r e ) 2 = = T 2 F 2 K D C F ,
P u n a b s p u m p = 0 N A c l a d / T I ( α ) exp ( γ L ) d α ,
P v g n t p u m p = N A c l a d / T N A c l a d I ( α ) exp ( γ L ( α ) ) d α
P l a u n c h p u m p = { P a b s ' + P u n a b s , α < N A c l a d / T P a b s ' ' + P v g n t , α > N A c l a d / T ,
P p a r a x p u m p = 20 log ( F T ) [ d B ]
L v g n t = P v g n t c o r e P i n c o r e = δ P ( N i n N o u t ) δ P N i n = ( N i n N o u t N i n ) = ( a i n 2 a o u t 2 a i n 2 ) = = T 2 1 T 2
K D C F n o r m = S T D C F T 2 F 2 C S D C F ,
α k = D ( k Δ z ) α k 1 D ( k Δ z ) D ' ( k Δ z ) k Δ z ,
θ ( α 0 ) = k = 1 N α k = k = 1 N D ( k Δ z ) α k 1 D ( k Δ z ) D ' ( k Δ z ) k Δ z .
k = 1 N D ( k Δ z ) α k 1 D ( k Δ z ) D ' ( k Δ z ) k Δ z = N A
D ( z ) = b 0 b L z 2 + b z + D 1 ,

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