Abstract

We propose the use of a short section of polarization-maintaining fiber as a birefringent medium to construct an all-fiber Lyot filter inside the cavity of a fiber laser. This allows mode-locked operation of an all-fiber all-normal dispersion Yb-fiber oscillator without the use of a bulk bandpass filter and using standard components. Moreover, filter bandwidth and modulation depth is easily controlled by changing the length and splice angle of the polarization-maintaining-fiber section, leading to an adjustable filter. At mode-locked operation, the 30% output fiber port delivers 1nJ pulses that are dechirped to 230fs duration.

© 2010 Optical Society of America

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References

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2009 (2)

J. Fekete, A. Cserteg and R. Szipocs, Laser Phys. Lett.  6, 49 (2009).
[CrossRef]

P. K. Mukhopadhyay, K. Özgören, I. L. Budunoglu, and F. Ö. Ilday, IEEE J. Sel. Top. Quantum Electron.  15, 145 (2009).
[CrossRef]

2008 (4)

F. W. Wise, A. Chong, and W. H. Renninger, Laser Photonics Rev.  2, 58 (2008).
[CrossRef]

W. H. Renninger, A. Chong, and F. W. Wise, Phys. Rev. A  77, 023814 (2008).
[CrossRef]

K. Kieu and F. W. Wise, Opt. Express  16, 11453 (2008).
[CrossRef] [PubMed]

M. Schultz, H. Karow, O. Prochnow, D. Wandt, U. Morgner, and D. Kracht, Opt. Express  16, 19562 (2008).
[CrossRef] [PubMed]

2007 (2)

2006 (1)

2002 (2)

1991 (1)

1933 (1)

B. Lyot, C. R. Acad. Sci. III  197, pp. 1593 (1933).

Buckley, J.

Budunoglu, I. L.

P. K. Mukhopadhyay, K. Özgören, I. L. Budunoglu, and F. Ö. Ilday, IEEE J. Sel. Top. Quantum Electron.  15, 145 (2009).
[CrossRef]

Chong, A.

F. W. Wise, A. Chong, and W. H. Renninger, Laser Photonics Rev.  2, 58 (2008).
[CrossRef]

W. H. Renninger, A. Chong, and F. W. Wise, Phys. Rev. A  77, 023814 (2008).
[CrossRef]

A. Chong, J. Buckley, W. Renninger, and F. Wise, Opt. Express  14, 10095 (2006).
[CrossRef] [PubMed]

Cserteg, A.

J. Fekete, A. Cserteg and R. Szipocs, Laser Phys. Lett.  6, 49 (2009).
[CrossRef]

Eidinger, E.

Fekete, J.

J. Fekete, A. Cserteg and R. Szipocs, Laser Phys. Lett.  6, 49 (2009).
[CrossRef]

Fermann, M. E.

Harberl, F.

Hofer, M.

Ilday, F. Ö.

P. K. Mukhopadhyay, K. Özgören, I. L. Budunoglu, and F. Ö. Ilday, IEEE J. Sel. Top. Quantum Electron.  15, 145 (2009).
[CrossRef]

H. Lim, F. Ö. Ilday, and F. W. Wise, Opt. Express  10, 1497 (2002).
[PubMed]

Karow, H.

Keiding, S. R.

Kieu, K.

Kracht, D.

Lim, H.

Lyot, B.

B. Lyot, C. R. Acad. Sci. III  197, pp. 1593 (1933).

Marom, E.

Mendlovic, D.

Morgner, U.

Mukhopadhyay, P. K.

P. K. Mukhopadhyay, K. Özgören, I. L. Budunoglu, and F. Ö. Ilday, IEEE J. Sel. Top. Quantum Electron.  15, 145 (2009).
[CrossRef]

Nielsen, C. K.

Ober, M. H.

Özgören, K.

P. K. Mukhopadhyay, K. Özgören, I. L. Budunoglu, and F. Ö. Ilday, IEEE J. Sel. Top. Quantum Electron.  15, 145 (2009).
[CrossRef]

Prochnow, O.

Renninger, W.

Renninger, W. H.

F. W. Wise, A. Chong, and W. H. Renninger, Laser Photonics Rev.  2, 58 (2008).
[CrossRef]

W. H. Renninger, A. Chong, and F. W. Wise, Phys. Rev. A  77, 023814 (2008).
[CrossRef]

Ruehl, A.

Schmidt, A. J.

Schultz, M.

Shabtay, G.

Szipocs, R.

J. Fekete, A. Cserteg and R. Szipocs, Laser Phys. Lett.  6, 49 (2009).
[CrossRef]

Wandt, D.

Wise, F.

Wise, F. W.

F. W. Wise, A. Chong, and W. H. Renninger, Laser Photonics Rev.  2, 58 (2008).
[CrossRef]

W. H. Renninger, A. Chong, and F. W. Wise, Phys. Rev. A  77, 023814 (2008).
[CrossRef]

K. Kieu and F. W. Wise, Opt. Express  16, 11453 (2008).
[CrossRef] [PubMed]

H. Lim, F. Ö. Ilday, and F. W. Wise, Opt. Express  10, 1497 (2002).
[PubMed]

Zalevsky, Z.

C. R. Acad. Sci. III (1)

B. Lyot, C. R. Acad. Sci. III  197, pp. 1593 (1933).

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

P. K. Mukhopadhyay, K. Özgören, I. L. Budunoglu, and F. Ö. Ilday, IEEE J. Sel. Top. Quantum Electron.  15, 145 (2009).
[CrossRef]

Laser Photonics Rev. (1)

F. W. Wise, A. Chong, and W. H. Renninger, Laser Photonics Rev.  2, 58 (2008).
[CrossRef]

Laser Phys. Lett. (1)

J. Fekete, A. Cserteg and R. Szipocs, Laser Phys. Lett.  6, 49 (2009).
[CrossRef]

Opt. Express (6)

Opt. Lett. (2)

Phys. Rev. A (1)

W. H. Renninger, A. Chong, and F. W. Wise, Phys. Rev. A  77, 023814 (2008).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Sketch of the setup. The Lyot filter action is illustrated. Fast axis of the PM fiber makes a 45° angle with the polarizer. The z axis is along the fiber direction.

Fig. 2
Fig. 2

(a) Simulated laser spectrum after the gain fiber (solid black curve) and after the PM fiber (red dashed curve). (b) Simulated spectral bandwidth (solid black curve) and pulse duration [solid gray (red) curve] variation over the cavity. Comparison of (c) the spectral width and (d) the pulse duration obtained numerically with the PM-fiber filter (solid black curves), Gaussian filter (red dashed-dotted curve) and cosine-square filter (blue dashed curves).

Fig. 3
Fig. 3

Measured optical spectra for cw operation (solid black curve) and theoretical transmission curves (red dashed curves) for effective filter bandwidths of (a) 6.5 nm and (b) 10.0 nm .

Fig. 4
Fig. 4

Measured spectra of pulses for 8.6 nm effective filter bandwidth from (a) the 30% fiber port, (b) the polarization extraction port, (c) the 5% port. (d) Measured autocorrelation of the pulses from the 30% fiber port. Inset, rf spectrum of the pulses.

Equations (4)

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Δ λ = λ m λ m + 1 = L Δ n ( 1 m 1 m + 1 ) λ 2 L Δ n .
[ e i β cos α sin α e i β sin α cos α ] × [ e i Δ φ cos 2 θ + sin 2 θ 0 ( e i Δ φ 1 ) sin θ cos θ 0 ] ,
1 2 [ ( e i Δ φ + 1 ) e i β cos α + ( e i Δ φ 1 ) sin α 0 ( e i Δ φ + 1 ) e i β sin α + ( e i Δ φ 1 ) cos α 0 ] .
tan Δ φ = tan ( 2 α ) sin β .

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