Abstract

A significant enhancement in the mode locking of a KCl:Tl color-center laser has been observed when a length of optical fiber having positive group-velocity dispersion was incorporated within an external control cavity. Pulse durations of ~260 fsec were obtained by this method, representing a compression factor ~60× that with the color-center laser alone. Similar results have also been observed with an InGaAsP semiconductor diode amplifier as the nonlinear element within the control cavity.

© 1989 Optical Society of America

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References

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1988 (2)

1987 (2)

N. Langford, K. Smith, W. Sibbett, Opt. Commun. 64, 247 (1987).

K. C. Byron, Electron. Lett. 23, 1324 (1987).

1986 (1)

F. M. Mitschke, L. F. Mollenauer, IEEE J. Quantum Electron. QE-22, 2242 (1986).

1985 (1)

1984 (1)

Blow, K. J.

Byron, K. C.

K. C. Byron, Electron. Lett. 23, 1324 (1987).

Diels, J. C.

Fontaine, J. J.

Langford, N.

N. Langford, K. Smith, W. Sibbett, Opt. Commun. 64, 247 (1987).

McMichael, I. C.

Mitschke, F. M.

F. M. Mitschke, L. F. Mollenauer, IEEE J. Quantum Electron. QE-22, 2242 (1986).

Mollenauer, L. F.

F. M. Mitschke, L. F. Mollenauer, IEEE J. Quantum Electron. QE-22, 2242 (1986).

L. F. Mollenauer, R. H. Stolen, Opt. Lett. 9, 13 (1984).

Nelson, B. P.

Sibbett, W.

N. Langford, K. Smith, W. Sibbett, Opt. Commun. 64, 247 (1987).

Simoni, F.

Smith, K.

N. Langford, K. Smith, W. Sibbett, Opt. Commun. 64, 247 (1987).

Stolen, R. H.

Wood, D.

Appl. Opt. (1)

Electron. Lett. (1)

K. C. Byron, Electron. Lett. 23, 1324 (1987).

IEEE J. Quantum Electron. (1)

F. M. Mitschke, L. F. Mollenauer, IEEE J. Quantum Electron. QE-22, 2242 (1986).

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

Opt. Commun. (1)

N. Langford, K. Smith, W. Sibbett, Opt. Commun. 64, 247 (1987).

Opt. Lett. (2)

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Figures (5)

Fig. 1
Fig. 1

Experimental arrangement of the coupled-cavity color-center laser. M/L, mode locked. Mirror reflectivities: M1, M2, M3, ~100%; M0, ~80%. Beam-splitter reflectivities: S1, ~50%; S2, ~30%.

Fig. 2
Fig. 2

Intensity and interferometric autocorrelation traces for pulses exiting the laser [(a) and (b)] and for pulses returning from the control fiber [(c) and (d)] with a fiber length of 55 cm. The fringes seen on the interferometric autocorrelations are not actual interference fringes but are due to sampling limitations on the digital oscilloscope.

Fig. 3
Fig. 3

Variation of the pulse duration from the coupled-cavity laser as a function of fiber length. The inset shows an autocorrelation trace of the 0.26-psec pulse with L = 24 cm.

Fig. 4
Fig. 4

Autocorrelation traces of the pulses obtained (a) from the LiF:F2+ laser alone and (b) with feedback from the control cavity for a fiber length of 2 m.

Fig. 5
Fig. 5

Pulse duration versus drive current to the InGaAsP diode amplifier in the control cavity of the KC1:T1 color-center laser. The inset shows typical intensity autocorrelation of the output pulses for a 35-mA diode injection current.

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