Abstract

We present a novel ytterbium (Yb)-doped large-pitch fiber design with significantly increased pump absorption and higher energy storage/gain per unit length, which enables high-peak-power fiber laser systems with smaller footprints. Up to now index matching between core and surrounding material in microstructured fibers was achieved by co-doping the active core region with fluorine. Here we carry out the index matching by passively doping the cladding with germanium, thus raising its index of refraction. Hence, the fluorine in the core can be omitted, which leads to an effective increase of the core doping concentration, while detrimental effects such as photo-darkening and lifetime quenching are avoided by maintaining the bulk Yb concentration. Experiments and simulations show that a gain higher than 50dB/m and an output average power higher than 100 W with excellent beam quality are feasible even with a fiber length of only 40 cm.

© 2014 Optical Society of America

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2013 (1)

2012 (1)

J. Limpert, F. Stutzki, F. Jansen, H.-J. Otto, T. Eidam, C. Jauregui, and A. Tünnermann, Light Sci. Appl. 1, e8 (2012).

2011 (2)

2010 (2)

M. Laurila, M. M. Jørgensen, K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, Opt. Express 20, 57423 (2010).

F. Jansen, F. Stutzki, H.-J. Otto, M. Baumgartl, C. Jauregui, J. Limpert, and A. Tünnermann, Opt. Express 18, 26834 (2010).
[CrossRef]

2009 (1)

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

2008 (1)

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

2007 (2)

2006 (2)

2003 (1)

1997 (2)

A. Hardy and R. Oron, IEEE J. Quantum Electron. 33, 307 (1997).
[CrossRef]

R. Paschotta, J. Nilsson, and P. Barber, Opt. Commun. 136, 375 (1997).
[CrossRef]

Alkeskjold, T. T.

M. Laurila, M. M. Jørgensen, K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, Opt. Express 20, 57423 (2010).

Augère, B.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Barber, P.

R. Paschotta, J. Nilsson, and P. Barber, Opt. Commun. 136, 375 (1997).
[CrossRef]

Baumgartl, M.

Bello Doua, R.

Benoit, A.

Besson, C.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Boullet, J.

Bourdon, P.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Broeng, J.

M. Laurila, M. M. Jørgensen, K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, Opt. Express 20, 57423 (2010).

Canat, G.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Cardinal, T.

Carstens, H.

Croteau, A.

A. Croteau, C. Paré, H. Zheng, P. Laperle, and Y. Taillon, Proc. SPIE 6101, 61010G (2006).
[CrossRef]

Dauliat, R.

Dolfi, A.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Dong, L.

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

Eidam, T.

J. Limpert, F. Stutzki, F. Jansen, H.-J. Otto, T. Eidam, C. Jauregui, and A. Tünnermann, Light Sci. Appl. 1, e8 (2012).

T. Eidam, J. Rothhardt, F. Stutzki, F. Jansen, S. Hädrich, H. Carstens, C. Jauregui, J. Limpert, and A. Tünnermann, Opt. Express 19, 255 (2011).
[CrossRef]

Ermeneux, S.

Feng, X.

Finazzi, V.

Fu, L.

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

Gaponov, D.

Gueorguiev, E.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Guillen, F.

Hädrich, S.

Hansen, K. R.

M. Laurila, M. M. Jørgensen, K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, Opt. Express 20, 57423 (2010).

Hardy, A.

A. Hardy and R. Oron, IEEE J. Quantum Electron. 33, 307 (1997).
[CrossRef]

Hewak, D.

Jamier, R.

Jansen, F.

Jaouën, Y.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Jauregui, C.

Jetschke, S.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Jolivet, V.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Jørgensen, M. M.

M. Laurila, M. M. Jørgensen, K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, Opt. Express 20, 57423 (2010).

M. M. Jørgensen, S. R. Petersen, M. Laurila, J. Lægsgaard, and T. Tanggaard Alkeskjold, Opt. Express 15, 1606 (2007).
[CrossRef]

Kirchhof, J.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Lægsgaard, J.

M. Laurila, M. M. Jørgensen, K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, Opt. Express 20, 57423 (2010).

M. M. Jørgensen, S. R. Petersen, M. Laurila, J. Lægsgaard, and T. Tanggaard Alkeskjold, Opt. Express 15, 1606 (2007).
[CrossRef]

Laperle, P.

A. Croteau, C. Paré, H. Zheng, P. Laperle, and Y. Taillon, Proc. SPIE 6101, 61010G (2006).
[CrossRef]

Laurila, M.

M. Laurila, M. M. Jørgensen, K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, Opt. Express 20, 57423 (2010).

M. M. Jørgensen, S. R. Petersen, M. Laurila, J. Lægsgaard, and T. Tanggaard Alkeskjold, Opt. Express 15, 1606 (2007).
[CrossRef]

Li, J.

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

Limpert, J.

Lombard, L.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Manek-Hönninger, I.

McKay, H. A.

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

Monro, T.

Nilsson, J.

R. Paschotta, J. Nilsson, and P. Barber, Opt. Commun. 136, 375 (1997).
[CrossRef]

Oron, R.

A. Hardy and R. Oron, IEEE J. Quantum Electron. 33, 307 (1997).
[CrossRef]

Otto, H.-J.

J. Limpert, F. Stutzki, F. Jansen, H.-J. Otto, T. Eidam, C. Jauregui, and A. Tünnermann, Light Sci. Appl. 1, e8 (2012).

F. Jansen, F. Stutzki, H.-J. Otto, M. Baumgartl, C. Jauregui, J. Limpert, and A. Tünnermann, Opt. Express 18, 26834 (2010).
[CrossRef]

Paré, C.

A. Croteau, C. Paré, H. Zheng, P. Laperle, and Y. Taillon, Proc. SPIE 6101, 61010G (2006).
[CrossRef]

Paschotta, R.

R. Paschotta, J. Nilsson, and P. Barber, Opt. Commun. 136, 375 (1997).
[CrossRef]

Petersen, S. R.

Petropoulos, P.

Planchat, C.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Podgorski, M.

Röser, F.

Rothhardt, J.

Roy, P.

Salin, F.

Schmidt, O.

Schreiber, T.

Schuster, K.

Stutzki, F.

Taillon, Y.

A. Croteau, C. Paré, H. Zheng, P. Laperle, and Y. Taillon, Proc. SPIE 6101, 61010G (2006).
[CrossRef]

Tanggaard Alkeskjold, T.

Tünnermann, A.

Unger, S.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Valla, M.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Vitre, C.

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

Winful, H.

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

Wu, T.

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

Yvernault, P.

Zheng, H.

A. Croteau, C. Paré, H. Zheng, P. Laperle, and Y. Taillon, Proc. SPIE 6101, 61010G (2006).
[CrossRef]

Fiber Integr. Opt. (1)

G. Canat, L. Lombard, A. Dolfi, M. Valla, C. Planchat, B. Augère, P. Bourdon, V. Jolivet, C. Besson, Y. Jaouën, S. Jetschke, S. Unger, J. Kirchhof, E. Gueorguiev, and C. Vitre, Fiber Integr. Opt. 27, 422 (2008).
[CrossRef]

IEEE J. Quantum Electron. (1)

A. Hardy and R. Oron, IEEE J. Quantum Electron. 33, 307 (1997).
[CrossRef]

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

L. Dong, T. Wu, H. A. McKay, L. Fu, J. Li, and H. Winful, IEEE J. Sel. Top. Quantum Electron. 15, 47 (2009).
[CrossRef]

Light Sci. Appl. (1)

J. Limpert, F. Stutzki, F. Jansen, H.-J. Otto, T. Eidam, C. Jauregui, and A. Tünnermann, Light Sci. Appl. 1, e8 (2012).

Opt. Commun. (1)

R. Paschotta, J. Nilsson, and P. Barber, Opt. Commun. 136, 375 (1997).
[CrossRef]

Opt. Express (9)

Proc. SPIE (1)

A. Croteau, C. Paré, H. Zheng, P. Laperle, and Y. Taillon, Proc. SPIE 6101, 61010G (2006).
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Index cross-section of Yb-doped (green) LPFs. Index matching can be achieved by either co-doping the core to reduce the index to the value of fused silica (blue) or by doping the cladding with Ge (gray) to increase its cladding index.

Fig. 2.
Fig. 2.

(a) Microscope image of the Ge-pedestal LPF taken with transmitted light and (b) mode profile at the highest output power.

Fig. 3.
Fig. 3.

Simulated slopes of a Ge-pedestal LPF (solid line) and a standard LPF (dashed line) with 25 μm pitch for various seed powers.

Fig. 4.
Fig. 4.

Experimentally determined maximum output powers for various seed conditions and fiber lengths for a launched pump power of 260 W.

Fig. 5.
Fig. 5.

Measured slopes for various seed powers launched in a 39 cm long Ge-pedestal LPF.

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