Abstract

We have successfully demonstrated a single-frequency distributed-feedback (DFB) thulium-doped silica fiber laser emitting at a wavelength of 1735 nm. The laser cavity is less than 5 cm long and is formed by intracore UV-written Bragg gratings with a phase shift. The laser is pumped at 790 nm from a Ti:sapphire laser and has a threshold pump power of 59 mW. The laser has a maximum output power of 1 mW in a single-frequency, single-polarization radiation mode and is tunable over a few nanometers. To the best of the authors’ knowledge, this is the first report of a single-frequency DFB fiber laser that uses thulium as the amplifying medium. The lasing wavelength is the longest demonstrated with DFB fiber lasers and yet is among the shortest obtained for thulium-doped silica fiber lasers.

© 2004 Optical Society of America

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References

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  1. C. Poulsen, P. Varming, J. Pedersen, M. Beukema, and S. Lauridsen, in Conference on Lasers and Electro-Optics (CLEO), Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003).
  2. S. D. Jackson and T. A. King, J. Lightwave Technol. 17, 948 (1999).
    [CrossRef]
  3. W. L. Barnes and J. E. Townsend, Electron. Lett. 26, 746 (1990).
    [CrossRef]
  4. J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
    [CrossRef]
  5. S. D. Jackson and S. Mossman, Appl. Opt. 42, 2702 (2003).
    [CrossRef] [PubMed]

2003 (1)

1999 (1)

1998 (1)

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

1990 (1)

W. L. Barnes and J. E. Townsend, Electron. Lett. 26, 746 (1990).
[CrossRef]

Barnes, W. L.

W. L. Barnes and J. E. Townsend, Electron. Lett. 26, 746 (1990).
[CrossRef]

Berendt, M. O.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

Beukema, M.

C. Poulsen, P. Varming, J. Pedersen, M. Beukema, and S. Lauridsen, in Conference on Lasers and Electro-Optics (CLEO), Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003).

Hübner, J.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

Jackson, S. D.

King, T. A.

Kristensen, M.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

Lauridsen, S.

C. Poulsen, P. Varming, J. Pedersen, M. Beukema, and S. Lauridsen, in Conference on Lasers and Electro-Optics (CLEO), Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003).

Lauridsen, V. C.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

Mossman, S.

Palsdottir, B.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

Pedersen, J.

C. Poulsen, P. Varming, J. Pedersen, M. Beukema, and S. Lauridsen, in Conference on Lasers and Electro-Optics (CLEO), Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003).

Philipsen, J. L.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

Poulsen, C.

C. Poulsen, P. Varming, J. Pedersen, M. Beukema, and S. Lauridsen, in Conference on Lasers and Electro-Optics (CLEO), Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003).

Povlsen, J. H.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

Townsend, J. E.

W. L. Barnes and J. E. Townsend, Electron. Lett. 26, 746 (1990).
[CrossRef]

Varming, P.

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

C. Poulsen, P. Varming, J. Pedersen, M. Beukema, and S. Lauridsen, in Conference on Lasers and Electro-Optics (CLEO), Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003).

Appl. Opt. (1)

Electron. Lett. (2)

W. L. Barnes and J. E. Townsend, Electron. Lett. 26, 746 (1990).
[CrossRef]

J. L. Philipsen, M. O. Berendt, P. Varming, V. C. Lauridsen, J. H. Povlsen, J. Hübner, M. Kristensen, and B. Palsdottir, Electron. Lett. 34, 678 (1998).
[CrossRef]

J. Lightwave Technol. (1)

Other (1)

C. Poulsen, P. Varming, J. Pedersen, M. Beukema, and S. Lauridsen, in Conference on Lasers and Electro-Optics (CLEO), Vol. 88 of OSA Trends in Optics and Photonics Series (Optical Society of America, Washington, D.C., 2003).

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Figures (4)

Fig. 1
Fig. 1

Energy-level diagram of thulium (Tm3+) in silica,2 showing the pump, absorption, and emission bands.

Fig. 2
Fig. 2

Left, absorption spectrum of thulium doped into a single-mode silica fiber. Typical pump bands are in the region near 790 or 1064 nm. Right, relative emission cross section for the signal band, showing the lasing wavelength.

Fig. 3
Fig. 3

Lasing spectrum showing single-frequency emission recorded with an Ando AQ6317B optical spectrum analyzer and a FPI. The amplified spontaneous emission level is less than -50 dB. The FPI has a free spectral range of 2 GHz and a finesse of 37 at the lasing wavelength.

Fig. 4
Fig. 4

Single-frequency output power at a wavelength of 1735 nm as a function of launched pump power. The threshold is 59 mW, and the slope efficiency is 0.20%.

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