Abstract

A cw mode-locked Ti:sapphire laser was efficiently frequency doubled with a lithium triborate crystal in an external enhancement cavity. Second-harmonic output powers of 1.28 W and 860 mW have been generated at 399 nm with fundamental pulse widths of 1.5 and 320 ps, respectively. At the 1.5-ps pulse width the conversion efficiency was 75%. The spectral width of the 320-ps pulses, produced by modification of a laser cavity, is as narrow as the bandwidth of a normal cw, multimode, narrow-bandwidth Ti:sapphire laser. The frequency-doubled output can be thus used as a high-power, narrow-bandwidth light source in the UV region.

© 1994 Optical Society of America

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  1. M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Appl. Phys. B 53, 11 (1991).
    [CrossRef]
  2. M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Commun. 97, 225 (1993).
    [CrossRef]
  3. P. F. Curley, A. I. Ferguson, Opt. Commun. 80, 365 (1991).
    [CrossRef]
  4. C. S. Adams, A. I. Ferguson, Opt. Commun. 90, 89 (1992).
    [CrossRef]
  5. A. Nebel, R. Beigang, Opt. Lett. 16, 1729 (1991).
    [CrossRef] [PubMed]
  6. S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
    [CrossRef]
  7. F. Seifert, V. Petrov, Opt. Commun. 99, 413 (1993).
    [CrossRef]
  8. T. W. Hänsch, B. Couillaud, Opt. Commun. 35, 441 (1980).
    [CrossRef]
  9. M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Lett. 17, 46 (1992).
    [CrossRef] [PubMed]
  10. E. S. Polzik, H. J. Kimble, Opt. Lett. 16, 1400 (1991).
    [CrossRef] [PubMed]
  11. G. D. Boyd, D. A. Kleinmann, J. Appl. Phys. 39, 3597 (1968).
    [CrossRef]

1993 (3)

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Commun. 97, 225 (1993).
[CrossRef]

S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
[CrossRef]

F. Seifert, V. Petrov, Opt. Commun. 99, 413 (1993).
[CrossRef]

1992 (2)

1991 (4)

A. Nebel, R. Beigang, Opt. Lett. 16, 1729 (1991).
[CrossRef] [PubMed]

P. F. Curley, A. I. Ferguson, Opt. Commun. 80, 365 (1991).
[CrossRef]

E. S. Polzik, H. J. Kimble, Opt. Lett. 16, 1400 (1991).
[CrossRef] [PubMed]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Appl. Phys. B 53, 11 (1991).
[CrossRef]

1980 (1)

T. W. Hänsch, B. Couillaud, Opt. Commun. 35, 441 (1980).
[CrossRef]

1968 (1)

G. D. Boyd, D. A. Kleinmann, J. Appl. Phys. 39, 3597 (1968).
[CrossRef]

Adams, C. S.

C. S. Adams, A. I. Ferguson, Opt. Commun. 90, 89 (1992).
[CrossRef]

Beigang, R.

Biraben, F.

S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
[CrossRef]

Bourzeix, S.

S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
[CrossRef]

Boyd, G. D.

G. D. Boyd, D. A. Kleinmann, J. Appl. Phys. 39, 3597 (1968).
[CrossRef]

Couillaud, B.

T. W. Hänsch, B. Couillaud, Opt. Commun. 35, 441 (1980).
[CrossRef]

Curley, P. F.

P. F. Curley, A. I. Ferguson, Opt. Commun. 80, 365 (1991).
[CrossRef]

Ferguson, A. I.

C. S. Adams, A. I. Ferguson, Opt. Commun. 90, 89 (1992).
[CrossRef]

P. F. Curley, A. I. Ferguson, Opt. Commun. 80, 365 (1991).
[CrossRef]

Hänsch, T. W.

T. W. Hänsch, B. Couillaud, Opt. Commun. 35, 441 (1980).
[CrossRef]

Hayasaka, K.

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Commun. 97, 225 (1993).
[CrossRef]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Lett. 17, 46 (1992).
[CrossRef] [PubMed]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Appl. Phys. B 53, 11 (1991).
[CrossRef]

Imajo, H.

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Commun. 97, 225 (1993).
[CrossRef]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Lett. 17, 46 (1992).
[CrossRef] [PubMed]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Appl. Phys. B 53, 11 (1991).
[CrossRef]

Julien, L.

S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
[CrossRef]

Kimble, H. J.

Kleinmann, D. A.

G. D. Boyd, D. A. Kleinmann, J. Appl. Phys. 39, 3597 (1968).
[CrossRef]

Nebel, A.

Nez, F.

S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
[CrossRef]

Petrov, V.

F. Seifert, V. Petrov, Opt. Commun. 99, 413 (1993).
[CrossRef]

Plimmer, M. D.

S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
[CrossRef]

Polzik, E. S.

Seifert, F.

F. Seifert, V. Petrov, Opt. Commun. 99, 413 (1993).
[CrossRef]

Urabe, S.

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Commun. 97, 225 (1993).
[CrossRef]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Lett. 17, 46 (1992).
[CrossRef] [PubMed]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Appl. Phys. B 53, 11 (1991).
[CrossRef]

Watanabe, M.

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Commun. 97, 225 (1993).
[CrossRef]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Lett. 17, 46 (1992).
[CrossRef] [PubMed]

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Appl. Phys. B 53, 11 (1991).
[CrossRef]

Appl. Phys. B (1)

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Appl. Phys. B 53, 11 (1991).
[CrossRef]

J. Appl. Phys. (1)

G. D. Boyd, D. A. Kleinmann, J. Appl. Phys. 39, 3597 (1968).
[CrossRef]

Opt. Commun. (6)

M. Watanabe, K. Hayasaka, H. Imajo, S. Urabe, Opt. Commun. 97, 225 (1993).
[CrossRef]

P. F. Curley, A. I. Ferguson, Opt. Commun. 80, 365 (1991).
[CrossRef]

C. S. Adams, A. I. Ferguson, Opt. Commun. 90, 89 (1992).
[CrossRef]

S. Bourzeix, M. D. Plimmer, F. Nez, L. Julien, F. Biraben, Opt. Commun. 99, 89 (1993).
[CrossRef]

F. Seifert, V. Petrov, Opt. Commun. 99, 413 (1993).
[CrossRef]

T. W. Hänsch, B. Couillaud, Opt. Commun. 35, 441 (1980).
[CrossRef]

Opt. Lett. (3)

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Figures (3)

Fig. 1
Fig. 1

Experimental setup for frequency doubling of a mode-locked Ti:sapphire laser with an enhancement cavity. PBS, polarization beam splitter; PZT, piezoelectric transducer; λ/2, half-wave plate; λ/4, quarter-wave plate.

Fig. 2
Fig. 2

(a) Pulse shape observed by the fast photodiode detector and sampling oscilloscope. The pulse width is 320 ps. The trace is inverted, with a scale of 200 ps/division. (b) Spectrum observed by the scanning Fabry–Perot interferometer. The longitudinal modes are resolved, and the spectral bandwidth is 1.2 GHz.

Fig. 3
Fig. 3

Second-harmonic average power as a function of the reflectivity of the coupling mirror. The experimental and theoretical values for the 1.5-ps pulses are shown by filled circles and the solid curve, and those for the 320-ps pulses are shown by open circles and the dotted curve.

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