Abstract

Amplification of a radially polarized laser beam is demonstrated by use of an Yb-doped double-clad fiber whose core cutoff wavelength for the LP11 mode is larger than the wavelength of the input beam. The beam power is amplified while maintaining the intensity and polarization distributions. The amplified spontaneous emission becomes negligible with increasing input power. The measured slope efficiency is 48%, and the output power is 1.1W.

© 2009 Optical Society of America

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2008 (1)

2007 (4)

2006 (1)

2004 (2)

Y. Jeong, J. K. Sahu, D. N. Payne, and J. Nilsson, Electron. Lett. 40, 470 (2004).
[CrossRef]

G. Volpe and D. Petrov, Opt. Commun. 237, 89 (2004).
[CrossRef]

2002 (1)

T. Grosjean, D. Courjon, and M. Spajer, Opt. Commun. 203, 1 (2002).
[CrossRef]

1999 (1)

V. G. Niziev and A. V. Nesterov, J. Phys. D 32, 1455 (1999).
[CrossRef]

1997 (1)

R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, IEEE J. Quantum Electron. 33, 1049 (1997).
[CrossRef]

Ahmed, M. A.

Courjon, D.

T. Grosjean, D. Courjon, and M. Spajer, Opt. Commun. 203, 1 (2002).
[CrossRef]

Davidson, N.

Endo, M.

Frede, M.

Graf, T.

Grosjean, T.

T. Grosjean, D. Courjon, and M. Spajer, Opt. Commun. 203, 1 (2002).
[CrossRef]

Hanna, D. C.

R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, IEEE J. Quantum Electron. 33, 1049 (1997).
[CrossRef]

Hildebrandt, M.

Jackel, S.

Jeong, Y.

Y. Jeong, J. K. Sahu, D. N. Payne, and J. Nilsson, Electron. Lett. 40, 470 (2004).
[CrossRef]

Kozawa, Y.

Kracht, D.

Li, J.-L.

J.-L. Li, K.-I. Ueda, A. Shirakawa, M. Musha, L.-X. Zhong, and Z.-M. Zhang, Laser Phys. Lett. 4, 814 (2007).
[CrossRef]

Lumer, Y.

Machavariani, G.

Meir, A.

Moshe, I.

Musha, M.

J.-L. Li, K.-I. Ueda, A. Shirakawa, M. Musha, L.-X. Zhong, and Z.-M. Zhang, Laser Phys. Lett. 4, 814 (2007).
[CrossRef]

Nesterov, A. V.

V. G. Niziev and A. V. Nesterov, J. Phys. D 32, 1455 (1999).
[CrossRef]

Nilsson, J.

Y. Jeong, J. K. Sahu, D. N. Payne, and J. Nilsson, Electron. Lett. 40, 470 (2004).
[CrossRef]

R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, IEEE J. Quantum Electron. 33, 1049 (1997).
[CrossRef]

Niziev, V. G.

V. G. Niziev and A. V. Nesterov, J. Phys. D 32, 1455 (1999).
[CrossRef]

Parriaux, O.

Paschotta, R.

R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, IEEE J. Quantum Electron. 33, 1049 (1997).
[CrossRef]

Payne, D. N.

Y. Jeong, J. K. Sahu, D. N. Payne, and J. Nilsson, Electron. Lett. 40, 470 (2004).
[CrossRef]

Petrov, D.

G. Volpe and D. Petrov, Opt. Commun. 237, 89 (2004).
[CrossRef]

Pommier, J.-C.

Sahu, J. K.

Y. Jeong, J. K. Sahu, D. N. Payne, and J. Nilsson, Electron. Lett. 40, 470 (2004).
[CrossRef]

Sato, S.

Schulz, J.

Shirakawa, A.

J.-L. Li, K.-I. Ueda, A. Shirakawa, M. Musha, L.-X. Zhong, and Z.-M. Zhang, Laser Phys. Lett. 4, 814 (2007).
[CrossRef]

Spajer, M.

T. Grosjean, D. Courjon, and M. Spajer, Opt. Commun. 203, 1 (2002).
[CrossRef]

Tropper, A. C.

R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, IEEE J. Quantum Electron. 33, 1049 (1997).
[CrossRef]

Ueda, K.-I.

J.-L. Li, K.-I. Ueda, A. Shirakawa, M. Musha, L.-X. Zhong, and Z.-M. Zhang, Laser Phys. Lett. 4, 814 (2007).
[CrossRef]

Volpe, G.

G. Volpe and D. Petrov, Opt. Commun. 237, 89 (2004).
[CrossRef]

Voss, A.

Yonezawa, K.

Zhang, Z.-M.

J.-L. Li, K.-I. Ueda, A. Shirakawa, M. Musha, L.-X. Zhong, and Z.-M. Zhang, Laser Phys. Lett. 4, 814 (2007).
[CrossRef]

Zhong, L.-X.

J.-L. Li, K.-I. Ueda, A. Shirakawa, M. Musha, L.-X. Zhong, and Z.-M. Zhang, Laser Phys. Lett. 4, 814 (2007).
[CrossRef]

Appl. Opt. (1)

Electron. Lett. (1)

Y. Jeong, J. K. Sahu, D. N. Payne, and J. Nilsson, Electron. Lett. 40, 470 (2004).
[CrossRef]

IEEE J. Quantum Electron. (1)

R. Paschotta, J. Nilsson, A. C. Tropper, and D. C. Hanna, IEEE J. Quantum Electron. 33, 1049 (1997).
[CrossRef]

J. Phys. D (1)

V. G. Niziev and A. V. Nesterov, J. Phys. D 32, 1455 (1999).
[CrossRef]

Laser Phys. Lett. (1)

J.-L. Li, K.-I. Ueda, A. Shirakawa, M. Musha, L.-X. Zhong, and Z.-M. Zhang, Laser Phys. Lett. 4, 814 (2007).
[CrossRef]

Opt. Commun. (2)

T. Grosjean, D. Courjon, and M. Spajer, Opt. Commun. 203, 1 (2002).
[CrossRef]

G. Volpe and D. Petrov, Opt. Commun. 237, 89 (2004).
[CrossRef]

Opt. Lett. (4)

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Figures (6)

Fig. 1
Fig. 1

Setup for the amplification of a radially polarized laser beam using an Yb-doped double-clad fiber.

Fig. 2
Fig. 2

Top row, intensity distributions of the input seed beam in the far field after propagating through the Yb-doped double-clad fiber. (a) Total intensity distribution and (b)–(d) distributions after passage through a linear polarizer. Bottom row, intensity distributions of the amplified output beam in the far field pumped at 2.8 W . (e) Total intensity distribution and (f)–(h) distributions after passage through a linear polarizer. The arrows indicate the pass axis of the polarizer.

Fig. 3
Fig. 3

Output power as a function of launched pump power for different input seed powers. Insets: intensity distributions of the amplified radially polarized beam pumped at 2.8 W for input seed powers of (a) 60 and (b) 10 mW .

Fig. 4
Fig. 4

Emission spectra of the amplified output beams pumped at (a) 450 and (b) 2000 mW for different input seed powers.

Fig. 5
Fig. 5

Intensity profiles across the beam center. (a) and (b) correspond to the conditions of Fig. 2a and inset (a) of Fig. 3, respectively. The dotted curves are the measured profiles. The solid curves represent fitting results (a) to a TM 01 mode and (b) to a superposition of TM 01 and Gaussian modes. In the latter case, the dashed and dotted-dashed curves correspond to theoretical TM 01 and Gaussian modes.

Fig. 6
Fig. 6

Ratio of the ASE power to the amplified output power as a function of the pump power for various input seed powers.

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