Abstract

In this letter, a simple, switchable dual-wavelength erbium-doped fiber laser operating in L-band is successfully proposed and demonstrated. The two wavelengths are specified by a Bragg grating formed in multimode fiber and the wavelength separation is 1.7 nm. The multimode section including the multimode fiber grating selects not only the lasing wavelengths but also the polarization states of the lasing lines. Stable dual-wavelength operation can be achieved due to the spatial mode beating effect induced by a single-mode/multimode/single-mode fiber combination structure. By simple adjustment of a polarization controller, the proposed laser can operate in stable dual-wavelength or switch between two wavelengths, all at room temperature.

© 2004 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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Chin. Phys. Lett. (1)

X. Feng, Y. Liu, L. Sun, S. Yuan, G. Kai, X. Dong, ???A Polarization Controlled Switchable Multiwavelength Erbium-Doped Fibre Laser??? Chin. Phys. Lett. 21 659-661 (2004)
[CrossRef]

Electron. Lett. (2)

Y. Sun,T. Szkopek, P.W.E. Smith. ???Demonstration of narrowband high-reflectivity Bragg gratings in a novel multimode fiber,??? Opt. Commun. 223 91-95 (2003) 15. S. Ramachandran, M. Das, Z. Wang, J. Fleming, and M. Yan, ???High extinction, broadband polarisers using long-period fiber gratings in few-mode fibers??? Electron. Lett. 38 1327-1328 (2002)
[CrossRef]

S. Ramachandran, M. Das, Z. Wang, J. Fleming, and M. Yan, ???High extinction, broadband polarisers using long-period fiber gratings in few-mode fibers??? Electron. Lett. 38 1327-1328 (2002)
[CrossRef]

Electron.Lett. (1)

Bong.Ahn Yu, Jaejoong Kwon, Seunghwan Chuang, ???Multiwavelength-switchable SOA-fibre ring laser using sampled Hi-Bi fibre grating,??? Electron.Lett. 39 649-650 (2003)
[CrossRef]

Fiber and Integrated Opt. (1)

S.jarabo. ???Experimental study of a multiwavelength erbium-doped fiber ring laser incorporating a spatial mode beating filter,??? Fiber and Integrated Opt. 20 325-339 (2001)
[CrossRef]

IEEE Photon. Technol. Lett. (4)

Yong Wook Lee and Byoungho Lee, ???Wavelength-switchable Erbium-doped fiber ring laser using spectral polarization-dependent loss element,??? IEEE Photon. Technol. Lett. 15, 795-797 (2003)
[CrossRef]

Qinghe Mao and John W. Y. Lit, ???Switchable multiwavelength erbium-doped fiber laser with cascaded fiber grating cavities,??? IEEE Photon. Technol. Lett. 14, 612-614 (2002)
[CrossRef]

X. Feng, Y. Liu, S. Fu, S. Yuan, X. Dong, ???Switchable dual-wavelength ytterbium-doped fiber laser based on a few-mode fiber grating,??? IEEE Photon. Technol. Lett. 16, 762-764 (2004).
[CrossRef]

U. Ghera, N. Konforti and M. Tur, ???Wavelength tunability in a Nd-doped fiber laser with an intracavity polarizer,??? IEEE Photon. Technol. Lett. 4 4-6 (1992)
[CrossRef]

IEEE Photon.Technol. Lett. (1)

Y.Z. Xu, H.Y. Tam, W.C. Du, and M.S. Demokan. ???Tunable dual-wavelength-switching fiber grating laser,??? IEEE Photon.Technol. Lett. 10 334-336 (1998)
[CrossRef]

J. Lightwave Technol. (2)

Opt. Commun. (3)

J. Sun, J. Qiu, D. Huang, ???Multiwavelength erbium-doped fiber lasers exploiting polarization hole burning,??? Opt. Commun. 182, 193-197 (2000).
[CrossRef]

C. Zhao, X. Yang, C. Lu, J. H. Ng, X. Guo, J. H. Ng, X. Guo, R. C. Partha, X. Dong, ???Switchable multiwavelength erbium-doped fiber lasers by using cascaded fiber Bragg gratings written in high birefringence fiber,??? Opt. Commun. 230, 313-317 (2004)
[CrossRef]

Chun-Liu Zhao, Shiquan Yang, Hongyun Meng, Zhaohui Li, Shuzhong Yuan,Kai Guiyun, and Xiaoyi Dong, ???Efficient multiwavelength fiber laser operating in L-band,??? Opt. Commun. 204 323-326 (2002)
[CrossRef]

Opt. Lett. (1)

Proc. SPIE (1)

K.H. Wanser, K.F. Voss, and A.D. Dersey, ???Novel fiber devices and sensors based on multimode fiber Bragg gratings,??? Proc. SPIE 2360 265-268 (1994)
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Reflection spectra of the MMFG

Fig. 2.
Fig. 2.

Experimental setup for polarization measurement of the MMFG

Fig. 3.
Fig. 3.

Schematic diagram of the proposed laser

Fig. 4.
Fig. 4.

Single-wavelength operation of the laser

Fig.5.
Fig.5.

Dual-wavelength operation of the laser (a): repeated scan from output2; (b): single scan from output1.

Equations (2)

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β = π Λ
β = 2 π λ n 1 1 4 Δ N + 1 V

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