Abstract

A new self-mode-locked ring-cavity Ti:sapphire laser is described that is self-mode locked in both unidirectional and bidirectional operations. We found that clockwise and counterclockwise pulses collide with each other at the Ti:sapphire rod when the laser is mode locked in a bidirectional operation. Spectrum narrowing and pulse broadening were found in bidirectional rather than unidirectional mode-locked operation. This is explained by the performance of a transient grating in the gain medium that restricts oscillation to a narrow spectral range.

© 1998 Optical Society of America

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References

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1996

1995

1994

A. Agnesi, “Kerr-lens mode-locking of solid state laser and unidirectional ring cavity,” IEEE J. Quantum Electron. 30, 1115–1123 (1994).
[CrossRef]

1993

1992

1991

1971

H. Kogelnik, C. V. Shank, “Stimulated emission in a periodic structure,” Appl. Phys. Lett. 18, 152–155 (1971).
[CrossRef]

Agnesi, A.

A. Agnesi, “Kerr-lens mode-locking of solid state laser and unidirectional ring cavity,” IEEE J. Quantum Electron. 30, 1115–1123 (1994).
[CrossRef]

Asaki, M. T.

Chou, Y. F.

Deng, K.-L.

Dunlop, A. M.

Firth, W. J.

Fujimoto, J. G.

Garvey, D.

Haus, H. A.

Heatley, D. R.

Hsieh, W. F.

Huang, C. P.

Ippen, E. P.

Jacobson, J.

Kapteyn, H. C.

Kasper, A.

Kean, P. W.

Kogelnik, H.

H. Kogelnik, C. V. Shank, “Stimulated emission in a periodic structure,” Appl. Phys. Lett. 18, 152–155 (1971).
[CrossRef]

Krausz, F.

Lai, Y.

Lin, K. H.

Murnane, M. M.

Pelouch, W. S.

Powers, P. E.

Shank, C. V.

H. Kogelnik, C. V. Shank, “Stimulated emission in a periodic structure,” Appl. Phys. Lett. 18, 152–155 (1971).
[CrossRef]

Sibbett, W.

Spence, D. E.

Spielmann, C.

Szipöcs, R.

Tamura, K.

Tang, C. L.

Wang, J.

Witte, K. J.

Xu, L.

Appl. Phys. Lett.

H. Kogelnik, C. V. Shank, “Stimulated emission in a periodic structure,” Appl. Phys. Lett. 18, 152–155 (1971).
[CrossRef]

IEEE J. Quantum Electron.

A. Agnesi, “Kerr-lens mode-locking of solid state laser and unidirectional ring cavity,” IEEE J. Quantum Electron. 30, 1115–1123 (1994).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Lett.

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Figures (6)

Fig. 1
Fig. 1

Schematic of the ring-cavity configuration for a self-mode-locked Ti:sapphire laser.

Fig. 2
Fig. 2

Output power of a Ti:sapphire ring laser as the position of mirror M4 is adjusted. The crosshatched region represents the mode-locked range.

Fig. 3
Fig. 3

Mode-locked pulse train: (a) bidirectional mode locking, (b) mode locking only in the CW direction, (c) mode locking in the CCW direction.

Fig. 4
Fig. 4

Mode locking in the CW direction (upper trace) with the modulated output in the CCW direction (lower trace). The amplitude scale is 50 mV/div for the upper trace and 5 mV for the lower trace.

Fig. 5
Fig. 5

Mode-locked pulse train for bidirectional operation: (a) initial process, (b) stable mode-locked state.

Fig. 6
Fig. 6

Spectrum and its corresponding autocorrelation trace for mode-locking operation in the (a) unidirectional and (b) bidirectional modes.

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