Abstract

We describe the design and operation of a compact femtosecond Ti:Al2O3 laser based on a novel multipass cavity (MPC) design. The laser is all solid state, has prismless dispersion compensation with double-chirped mirrors, and uses a tight-focusing geometry to facilitate efficient low-threshold operation. We increase output pulse energies by extending the resonator length with a compact, scalable MPC, which preserves the characteristics of the Gaussian beam for the short cavity. Although the effective cavity length is 5 m, an extremely compact laser that measures only 30 cm×45 cm is achieved. With only 1.5 W of pump power, the laser generates 23-fs pulses at a repetition rate of 31.25 MHz and with 88 mW of average output power, corresponding to 2.8 nJ of pulse energy.

© 2003 Optical Society of America

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References

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2003 (1)

2002 (1)

2001 (1)

1999 (2)

N. Matuschek, F. X. Kärtner, and U. Keller, IEEE J. Quantum Electron. 35, 129 (1999).
[CrossRef]

S. H. Cho, B. E. Bouma, E. P. Ippen, and J. G. Fujimoto, Opt. Lett. 24, 417 (1999).
[CrossRef]

1997 (1)

1996 (1)

Blonigen, F.

Bouma, B. E.

Cho, S. H.

Cunningham, J. E.

Fujimoto, J. G.

Haus, H. A.

Heine, C.

Ippen, E. P.

Kapteyn, H. C.

K. Read, F. Blonigen, N. Riccelli, M. M. Murnane, and H. C. Kapteyn, Opt. Lett. 21, 489 (1996).
[CrossRef] [PubMed]

A. R. Libertun, R. Shelton, H. C. Kapteyn, and M. M. Murnane, in Conference on Lasers and Electro-Optics (CLEO/US), 1999 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1999), pp. 469–470.

Kärtner, F. X.

Keller, U.

Knox, W. H.

Kowalevicz, A. M.

Libertun, A. R.

A. R. Libertun, R. Shelton, H. C. Kapteyn, and M. M. Murnane, in Conference on Lasers and Electro-Optics (CLEO/US), 1999 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1999), pp. 469–470.

Matuschek, N.

Morf, R.

Morgner, U.

Murnane, M. M.

K. Read, F. Blonigen, N. Riccelli, M. M. Murnane, and H. C. Kapteyn, Opt. Lett. 21, 489 (1996).
[CrossRef] [PubMed]

A. R. Libertun, R. Shelton, H. C. Kapteyn, and M. M. Murnane, in Conference on Lasers and Electro-Optics (CLEO/US), 1999 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1999), pp. 469–470.

Read, K.

Riccelli, N.

Scheuer, V.

Schibli, T.

Schibli, T. R.

Sennaroglu, A.

Shelton, R.

A. R. Libertun, R. Shelton, H. C. Kapteyn, and M. M. Murnane, in Conference on Lasers and Electro-Optics (CLEO/US), 1999 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1999), pp. 469–470.

Tilsch, M.

Tschudi, T.

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Figures (3)

Fig. 1
Fig. 1

Schematic of the compact, prismless, low-threshold, MPC femtosecond Ti:Al2O3 laser. Cavity lengths are extended and pulse energies increased with this MPC cavity. L’s, lenses; other abbreviations defined in text.

Fig. 2
Fig. 2

(a) Spectrum and (b) second-harmonic intensity autocorrelation of the pulses obtained from the multipass Ti:Al2O3 oscillator. Pulse durations of 23 fs with bandwidths of 40 nm are generated.

Fig. 3
Fig. 3

Efficiency curves from the multipass Ti:Al2O3 laser oscillator for optimum cw alignment with cw operation (filled squares) and for optimum KLM alignment with mode-locked operation (open circles). The filled triangles show the output when the laser is aligned for optimum KLM operation but operated cw.

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