Abstract

We report synchronously mode-locked subpicosecond and continuous-wave color-center laser operation in the 1.8–2.4-μm wavelength range. For active materials we use (F2+)H centers in KBr:O2 and (F2+)AH centers in KBr:Na+:O2 crystals. When the lasers are pumped with a continuous-wave or mode-locked NaCl (F2+)H-center laser in a cascaded configuration, laser operation is obtained over the combined tuning range of 1.8–2.4 μm, with output powers as high as 150 mW. When synchronously mode locked with ~5-ps pump pulses, both KBr lasers yield typically ~1-ps pulse widths over the entire tuning range. Pulses as short as ~400 fs could be obtained at the expense of higher noise levels.

© 1994 Optical Society of America

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References

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  1. D. Wandt, W. Gellermann, F. Luty, H. Welling, J. Appl. Phys. 61, 864 (1987).
    [CrossRef]
  2. D. Wandt, W. Gellermann, Opt. Commun. 61, 405 (1987).
    [CrossRef]
  3. K Möllmann, F. Mitschke, W. Gellermann, Opt. Commun. 83, 177 (1991).
    [CrossRef]
  4. K Möllmann, W. Gellermann, H. Welling, in Digest of International Conference on Quantum Electronics (Optical Society of America, Washington, D.C., 1992), paper MoD4.
  5. L. F. Mollenauer, N. D. Viera, L. Szeto, Opt. Lett. 7, 414 (1982).
    [CrossRef] [PubMed]
  6. A. M. Johnson, W. M. Simpson, J. Opt. Soc. Am. B 2, 619 (1985).
    [CrossRef]
  7. K Möllmann, W. Gellermann, Opt. Lett. 19, 490 (1994).
    [CrossRef] [PubMed]
  8. G. Steinmeyer, U. Morgner, M. Ostermeyer, F. Mitschke, H. Welling, Opt. Lett. 18, 1544 (1993).
    [CrossRef] [PubMed]

1994 (1)

1993 (1)

1991 (1)

K Möllmann, F. Mitschke, W. Gellermann, Opt. Commun. 83, 177 (1991).
[CrossRef]

1987 (2)

D. Wandt, W. Gellermann, F. Luty, H. Welling, J. Appl. Phys. 61, 864 (1987).
[CrossRef]

D. Wandt, W. Gellermann, Opt. Commun. 61, 405 (1987).
[CrossRef]

1985 (1)

1982 (1)

Gellermann, W.

K Möllmann, W. Gellermann, Opt. Lett. 19, 490 (1994).
[CrossRef] [PubMed]

K Möllmann, F. Mitschke, W. Gellermann, Opt. Commun. 83, 177 (1991).
[CrossRef]

D. Wandt, W. Gellermann, Opt. Commun. 61, 405 (1987).
[CrossRef]

D. Wandt, W. Gellermann, F. Luty, H. Welling, J. Appl. Phys. 61, 864 (1987).
[CrossRef]

K Möllmann, W. Gellermann, H. Welling, in Digest of International Conference on Quantum Electronics (Optical Society of America, Washington, D.C., 1992), paper MoD4.

Johnson, A. M.

Luty, F.

D. Wandt, W. Gellermann, F. Luty, H. Welling, J. Appl. Phys. 61, 864 (1987).
[CrossRef]

Mitschke, F.

Mollenauer, L. F.

Möllmann, K

K Möllmann, W. Gellermann, Opt. Lett. 19, 490 (1994).
[CrossRef] [PubMed]

K Möllmann, F. Mitschke, W. Gellermann, Opt. Commun. 83, 177 (1991).
[CrossRef]

K Möllmann, W. Gellermann, H. Welling, in Digest of International Conference on Quantum Electronics (Optical Society of America, Washington, D.C., 1992), paper MoD4.

Morgner, U.

Ostermeyer, M.

Simpson, W. M.

Steinmeyer, G.

Szeto, L.

Viera, N. D.

Wandt, D.

D. Wandt, W. Gellermann, F. Luty, H. Welling, J. Appl. Phys. 61, 864 (1987).
[CrossRef]

D. Wandt, W. Gellermann, Opt. Commun. 61, 405 (1987).
[CrossRef]

Welling, H.

G. Steinmeyer, U. Morgner, M. Ostermeyer, F. Mitschke, H. Welling, Opt. Lett. 18, 1544 (1993).
[CrossRef] [PubMed]

D. Wandt, W. Gellermann, F. Luty, H. Welling, J. Appl. Phys. 61, 864 (1987).
[CrossRef]

K Möllmann, W. Gellermann, H. Welling, in Digest of International Conference on Quantum Electronics (Optical Society of America, Washington, D.C., 1992), paper MoD4.

J. Appl. Phys. (1)

D. Wandt, W. Gellermann, F. Luty, H. Welling, J. Appl. Phys. 61, 864 (1987).
[CrossRef]

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

Opt. Commun. (2)

D. Wandt, W. Gellermann, Opt. Commun. 61, 405 (1987).
[CrossRef]

K Möllmann, F. Mitschke, W. Gellermann, Opt. Commun. 83, 177 (1991).
[CrossRef]

Opt. Lett. (3)

Other (1)

K Möllmann, W. Gellermann, H. Welling, in Digest of International Conference on Quantum Electronics (Optical Society of America, Washington, D.C., 1992), paper MoD4.

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Figures (5)

Fig. 1
Fig. 1

(a) Absorption spectra (77 K) of an additively colored KBr:Na+:O2 crystal, measured after visible-light exposure at 260 K (dashed curves) and subsequent visible-light exposure at 77 K (solid curves). The spectra show the shape and positions of an essentially pure (F2+)AH-center system, (b) Emission (77 K) of a laser-active (F2+)AH-center transition in KBr:Na+:O2, measured under excitation at 1.6 μm. Also shown is the emission of (F2+)H centers in KBr:O2.

Fig. 2
Fig. 2

Tuning behavior of KBr lasers operating continuous wave or mode locked and tuned with a quartz prism. Filled circles, KBr (F2+)H-center laser, output coupling 37%, pump power ~1.7 W. Open circles and squares, KBr (F2+)AH-center laser, output coupling 20% (circles) and 4% (squares), pump power ~1.35 W. The data point at ~1.85 μm is obtained with a different mirror set.

Fig. 3
Fig. 3

Autocorrelation trace (top) and frequency spectrum (bottom) of a typical pulse obtained for a synchronously mode-locked KBr (F2+)H-center laser at ~2.0 μm. Solid traces, measurements; dotted traces, computer fit with a 1.15-ps sech2 pulse.

Fig. 4
Fig. 4

Autocorrelation traces of subpicosecond pulses obtained with a KBr (F2+)H-center laser at ~1.9 μm: (a) shortest obtained pedestal-free 404-fs pulse measured over a 12-ps time window, (b) satellite-free 610-fs pulse measured over a 60-ps time window.

Fig. 5
Fig. 5

Pulse width of a KBr (F2+)H-center laser versus the pulse width of a NaCl (F2+)H pump laser, shown as a double logarithmic plot.

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