Abstract

We demonstrate mode-locked two-wavelength synchronized operation of a single cw-pumped Ti:sapphire laser. There is no active feedback or external cavity. The measured cross correlation is 105 fs. Cross mode locking is maintained for relative cavity length detunings as large as ±3 μm and wavelength offsets as large as 20 nm.

© 1993 Optical Society of America

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References

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  1. W. H. Knox, F. A. Beisser, Opt. Lett. 17, 1012 (1992).
    [CrossRef] [PubMed]
  2. S. B. Darack, D. R. Dykaar, G. T. Harvey, Opt. Lett. 16, 1677 (1991).
    [CrossRef] [PubMed]
  3. D. R. Walker, D. W. Crust, W. E. Sleat, W. Sibbett, IEEE J. Quantum Electron. 28, 289 (1992).
    [CrossRef]
  4. V. V. Afanasjev, E. M. Dianov, V. S. Serkin, IEEE J. Quantum Electron. 25, 2656 (1989).
    [CrossRef]
  5. M. Lisak, A. Höök, D. Anderson, J. Opt. Soc. Am. B 7, 810 (1990).
    [CrossRef]
  6. T. M. Mukai, R. Wynands, T. W. Hänsch, in Quantum Electronics and Laser Science, Vol. 13 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), p. 252.

1992 (2)

W. H. Knox, F. A. Beisser, Opt. Lett. 17, 1012 (1992).
[CrossRef] [PubMed]

D. R. Walker, D. W. Crust, W. E. Sleat, W. Sibbett, IEEE J. Quantum Electron. 28, 289 (1992).
[CrossRef]

1991 (1)

1990 (1)

1989 (1)

V. V. Afanasjev, E. M. Dianov, V. S. Serkin, IEEE J. Quantum Electron. 25, 2656 (1989).
[CrossRef]

Afanasjev, V. V.

V. V. Afanasjev, E. M. Dianov, V. S. Serkin, IEEE J. Quantum Electron. 25, 2656 (1989).
[CrossRef]

Anderson, D.

Beisser, F. A.

Crust, D. W.

D. R. Walker, D. W. Crust, W. E. Sleat, W. Sibbett, IEEE J. Quantum Electron. 28, 289 (1992).
[CrossRef]

Darack, S. B.

Dianov, E. M.

V. V. Afanasjev, E. M. Dianov, V. S. Serkin, IEEE J. Quantum Electron. 25, 2656 (1989).
[CrossRef]

Dykaar, D. R.

Hänsch, T. W.

T. M. Mukai, R. Wynands, T. W. Hänsch, in Quantum Electronics and Laser Science, Vol. 13 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), p. 252.

Harvey, G. T.

Höök, A.

Knox, W. H.

Lisak, M.

Mukai, T. M.

T. M. Mukai, R. Wynands, T. W. Hänsch, in Quantum Electronics and Laser Science, Vol. 13 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), p. 252.

Serkin, V. S.

V. V. Afanasjev, E. M. Dianov, V. S. Serkin, IEEE J. Quantum Electron. 25, 2656 (1989).
[CrossRef]

Sibbett, W.

D. R. Walker, D. W. Crust, W. E. Sleat, W. Sibbett, IEEE J. Quantum Electron. 28, 289 (1992).
[CrossRef]

Sleat, W. E.

D. R. Walker, D. W. Crust, W. E. Sleat, W. Sibbett, IEEE J. Quantum Electron. 28, 289 (1992).
[CrossRef]

Walker, D. R.

D. R. Walker, D. W. Crust, W. E. Sleat, W. Sibbett, IEEE J. Quantum Electron. 28, 289 (1992).
[CrossRef]

Wynands, R.

T. M. Mukai, R. Wynands, T. W. Hänsch, in Quantum Electronics and Laser Science, Vol. 13 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), p. 252.

IEEE J. Quantum Electron. (2)

D. R. Walker, D. W. Crust, W. E. Sleat, W. Sibbett, IEEE J. Quantum Electron. 28, 289 (1992).
[CrossRef]

V. V. Afanasjev, E. M. Dianov, V. S. Serkin, IEEE J. Quantum Electron. 25, 2656 (1989).
[CrossRef]

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

Opt. Lett. (2)

Other (1)

T. M. Mukai, R. Wynands, T. W. Hänsch, in Quantum Electronics and Laser Science, Vol. 13 of 1992 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1992), p. 252.

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Figures (5)

Fig. 1
Fig. 1

Block diagram of experimental setup with (a) top and (b) side views of the laser cavity. Note that the argon pump beams cross just before entering the Ti:Al2O3 rod so the lasing modes do not cross in the rod, they cross twice outside the rod. The relative cavity offset is Δl. (c) The D-shaped cavity end mirrors. Each is cut from a 2.54-cm (1-in.) round mirror.

Fig. 2
Fig. 2

Measured 105-fs FWHM cross correlation. The horizontal axis is 75 fs/division.

Fig. 3
Fig. 3

Noise spectra (10-Hz resolution) for pulse trains detected on individual Si diodes and summed into a spectrum analyzer. (a) Unlocked, with two spikes indicating different repetition rates. (b) Cross locked, with a single repetition rate and total phase noise reduced.

Fig. 4
Fig. 4

Double exposure showing the cross correlations for the two stable locking regimes. The relative time delay is 3.5 ps, corresponding to a pulse separation of 0.6 mm inside the laser rod. Reducing the relative cavity offset Δl reduces this time to less than the pulse width.

Fig. 5
Fig. 5

Spectra of the cross-mode-locked beams. The beams are imaged using a single grating and a phosphor card. Peaks of the spectra are measured by using a monochromator to be 760 and 780 nm. The shorter-wavelength spectrum appears brighter, and there is essentially no wavelength overlap.

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