Abstract

A single-mode fiber laser based on an intracavity core-cladding mode conversion is demonstrated. The fiber laser consists of an Er-doped active fiber and two fiber Bragg gratings. One Bragg grating is a core-cladding mode converter, and the other Bragg grating is a narrowband high reflector that selects the lasing wavelength. Coupling a single core mode and a single cladding mode by the grating mode converter, the laser operates as a hybrid single-mode laser. This approach for designing a laser cavity provides a much larger mode area than conventional large-mode-area step-index fibers.

© 2008 Optical Society of America

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References

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2007 (1)

2006 (5)

2005 (3)

2004 (1)

C.-H. Liu, B. Ehlers, F. Doerfel, S. Heinemann, A. Carter, K. Tankala, J. Farroni, and A. Galvanauskas, Electron. Lett. 40, 1471 (2004).
[CrossRef]

2003 (2)

J. Limpert, A. Liem, H. Zellmer, and A. Tünnermann, Electron. Lett. 39, 645 (2003).
[CrossRef]

P. Russell, Science 299, 358 (2003).
[CrossRef] [PubMed]

2000 (1)

1997 (1)

Electron. Lett. (2)

C.-H. Liu, B. Ehlers, F. Doerfel, S. Heinemann, A. Carter, K. Tankala, J. Farroni, and A. Galvanauskas, Electron. Lett. 40, 1471 (2004).
[CrossRef]

J. Limpert, A. Liem, H. Zellmer, and A. Tünnermann, Electron. Lett. 39, 645 (2003).
[CrossRef]

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

Opt. Express (2)

Opt. Lett. (8)

Science (1)

P. Russell, Science 299, 358 (2003).
[CrossRef] [PubMed]

Other (2)

S. Ramachandran, K. Brar, S. Ghalmi, K. Aiso, M. Yan, D. Trevor, J. Fleming, C. Headley, P. Wisk, G. Zydzik, M. Fishteyn, E. Monberg, and F. Dimarcello, in Photonics West, Late Breaking Developments--Session 6453--9 (San Jose, Calif., 2007).

E. Snitzer, H. Po, F. Hakimi, R. Tumminelli, and B. C. McCollum, in Optical Fiber Sensors, Vol. 2 of 1988 OSA Technical Digest Series (Optical Society of America, 1988), postdeadline paper PD5.

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Figures (3)

Fig. 1
Fig. 1

(a) Schematic of the fiber laser setup, (b) transmittance spectrum of FBG1, (c) reflectivity spectrum of FBG2, and (d) schematic of an unfolded cavity that is equivalent to the fabricated folded cavity with core-cladding mode conversion.

Fig. 2
Fig. 2

(a) Laser emission spectra at different pump powers, (b) output versus launched pump power, (c) spatial profile of the laser below threshold, and (d)–(f) spatial profiles above threshold. Pump power increases from (d) to (f).

Fig. 3
Fig. 3

Lasing spectra and spatial profiles of the fiber laser at different temperatures of FBG2.

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