Abstract

Appropriate eye protection is a prerequisite for the safe operation of ultrashort laser systems in industrial and laboratory environments. In this paper we report on the measurement of the transmission of ion-doped phosphate glass filters for pulses having a center wavelength of 800nm, a duration of 10fs to 1.2ps and a fluence range of 0.01 to 30J/cm2. The measurements suggest, that the filter material preserves its protective features over the whole range. Saturation of absorption was only observed in the picosecond pulse duration range.

© 2004 Optical Society of America

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References

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  1. W. Koschinski, A. Schirmacher, E. Sutter, �??Induced transmittance of eye-protective laser filters,�?? J. Laser Applications 10, 126-130 (1998).
    [CrossRef]
  2. A. Schirmacher, E. Sutter, O. Werhahn, U. Siegner, A. Nevejina-Sturhahn, �??Investigation of the irradiance dependent spectral transmittance of laser filters in the nanosecond and femtosecond impulse regime in the wavelength range between 700nm and 800nm,�?? Int. Laser Safety Conference 2003
  3. M. Lenzner, J. Krüger, S. Sartania, Z. Cheng, C. Spielmann, G. Mourou, W. Kautek , F. Krausz, �??Femtosecond optical breakdown in dielectrics,�?? Phys. Rev. Lett. 80, 4076-4079 (1998).
    [CrossRef]
  4. B. C. Stuart, M. D. Feit, A. M. Rubenchik, B. W. Shore, M. D. Perry, �??Laser induced damage in dielectrics with nanosecond to subpicosecond pulses,�?? Phys. Rev. Lett. 74, 2248-2251 (1995).
    [CrossRef] [PubMed]
  5. A. Schirmacher, E. Sutter, �??Induced transmittance in alexandrite laser-eyeprotectros - a survey of different types of laser filters,�?? Optics and Laser Technology 33, 359 �??362 (2001).
    [CrossRef]
  6. S. Sartania, Z. Cheng, M. Lenzner, G. Tempea, C. Spielmann, F. Krausz, K. Ferencz, �??Generation of 0.1- TW 5-fs optical pulses at a 1-kHz repetiton rate,�?? Opt. Lett. 22, 1562-1565 (1997).
    [CrossRef]
  7. J. Krüger, M. Lenzner, S. Martin, M. Lenner, C. Spielmann, A. Fiedler, W. Kautek, �??Single- and multipulse femtosecond laser ablation of optical filter materials,�?? Applied Surface Science 208-209, 233-237 (2003).
    [CrossRef]

Applied Surface Science (1)

J. Krüger, M. Lenzner, S. Martin, M. Lenner, C. Spielmann, A. Fiedler, W. Kautek, �??Single- and multipulse femtosecond laser ablation of optical filter materials,�?? Applied Surface Science 208-209, 233-237 (2003).
[CrossRef]

J. Laser Applications (1)

W. Koschinski, A. Schirmacher, E. Sutter, �??Induced transmittance of eye-protective laser filters,�?? J. Laser Applications 10, 126-130 (1998).
[CrossRef]

Opt. Lett. (1)

Optics and Laser Technology (1)

A. Schirmacher, E. Sutter, �??Induced transmittance in alexandrite laser-eyeprotectros - a survey of different types of laser filters,�?? Optics and Laser Technology 33, 359 �??362 (2001).
[CrossRef]

Phys. Rev. Lett. (2)

M. Lenzner, J. Krüger, S. Sartania, Z. Cheng, C. Spielmann, G. Mourou, W. Kautek , F. Krausz, �??Femtosecond optical breakdown in dielectrics,�?? Phys. Rev. Lett. 80, 4076-4079 (1998).
[CrossRef]

B. C. Stuart, M. D. Feit, A. M. Rubenchik, B. W. Shore, M. D. Perry, �??Laser induced damage in dielectrics with nanosecond to subpicosecond pulses,�?? Phys. Rev. Lett. 74, 2248-2251 (1995).
[CrossRef] [PubMed]

Other (1)

A. Schirmacher, E. Sutter, O. Werhahn, U. Siegner, A. Nevejina-Sturhahn, �??Investigation of the irradiance dependent spectral transmittance of laser filters in the nanosecond and femtosecond impulse regime in the wavelength range between 700nm and 800nm,�?? Int. Laser Safety Conference 2003

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Figures (4)

Fig. 1.
Fig. 1.

Measured spectra for the pulses having a duration of ≥25fs (dashed line) and 10fs (dotted line) and the transmission curve (solid line) for a 0.5mm thick filter sample.

Fig. 2.
Fig. 2.

Measured single shot transmission as a function of fluence and pulse duration for a 0.5mm thick sample. The total fluence range can be divided in four subranges: I) linear range, II) fluence above damage fluence and below saturation fluence, III) fluence above saturation fluence and below damage fluence (only for 1.2ps-pulses), and IV) fluence much larger than the damage fluence.

Fig. 3.
Fig. 3.

Measured transmission of the 0.5mm thick filter sample as a function of fluence for a pulse duration of 25 fs and an increasing number of laser shots on the same spot.

Fig. 4.
Fig. 4.

Measured transmission of the 0.5mm thick filter sample as a function of fluence for a pulse duration of 1.2 ps and an increasing number of laser shots on the same spot.

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