Abstract

We report what is to our knowledge the first high repetition rate Q-switched Nd:BaY2F8 (Nd:BaYF) laser pumped with a multiwatt fiber-coupled diode array tuned at 806 nm. As much as 2.42 W of average power and up to 1.05 mJ of pulse energy were obtained with 6.1 W of absorbed pump power, with excellent beam quality (M 2<1.2) and linear polarization.

© 2004 Optical Society of America

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References

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  1. W.A. Clarkson, P.J. Hardman, D.C. Hanna, ???High-power diode-bar end-pumped Nd:YLF laser at 1.053 µm,??? Opt. Lett. 23, 1363-1365 (1998).
    [CrossRef]
  2. J. Harrison, P.F. Moulton, G.A. Scott, ???13-W, M2<1.2 Nd:YLF laser pumped by a pair of 20-W diode bars,??? Postdeadline Paper CPD-20, CLEO 1995
  3. A.A. Kaminskii, ???New room-temperature diode-laser-pumped efficient quasi-cw and cw single-mode laser based on monoclinic BaY2F8:Nd3+ crystal,??? Phys. Stat. Sol. (a) 137, 61-63 (1993).
    [CrossRef]
  4. N.P. Barnes, K.E. Murray, A. Cassanho, K.M. Dinndorf, H.P. Jenssen, ???Flashlamp pumped Nd:BaY2F8,??? in OSA Proceedings on Advanced Solid-State Lasers, A.A. Pinto and T.Y. Fan, eds., Vol. 15 (Optical Society of America, Washington, D.C., 1993), 24-27.
  5. A. Agnesi, A. Guandalini, G. Reali, E. Sani, A. Toncelli, M. Tonelli, ???Spectroscopic analysis and diode pumped laser results of Nd: BaY2F8,??? IEEE J. of Quantum Electron. 39, 971-978 (2003).
    [CrossRef]
  6. A. Agnesi, A. Guandalini, A. Lucca, E. Sani, A. Toncelli, M. Tonelli, ???Medium-power diode-pumped Nd: BaY2F8,??? Opt. Express 11, 1149-1155 (2003).
    [CrossRef] [PubMed]
  7. Y.-F. Chen, ???Design criteria for concentration optimization in scaling diode end-pumped lasers to high powers: influence of thermal fracture,??? IEEE J. of Quantum Electron. 35, 234-239 (1999).
    [CrossRef]
  8. W. Koechner, Solid-State Laser Engineering (Springer, Berlin, 1996).

CLEO 1995

J. Harrison, P.F. Moulton, G.A. Scott, ???13-W, M2<1.2 Nd:YLF laser pumped by a pair of 20-W diode bars,??? Postdeadline Paper CPD-20, CLEO 1995

IEEE J. of Quantum Electron.

A. Agnesi, A. Guandalini, G. Reali, E. Sani, A. Toncelli, M. Tonelli, ???Spectroscopic analysis and diode pumped laser results of Nd: BaY2F8,??? IEEE J. of Quantum Electron. 39, 971-978 (2003).
[CrossRef]

Y.-F. Chen, ???Design criteria for concentration optimization in scaling diode end-pumped lasers to high powers: influence of thermal fracture,??? IEEE J. of Quantum Electron. 35, 234-239 (1999).
[CrossRef]

Opt. Express

Opt. Lett.

OSA Proceedings

N.P. Barnes, K.E. Murray, A. Cassanho, K.M. Dinndorf, H.P. Jenssen, ???Flashlamp pumped Nd:BaY2F8,??? in OSA Proceedings on Advanced Solid-State Lasers, A.A. Pinto and T.Y. Fan, eds., Vol. 15 (Optical Society of America, Washington, D.C., 1993), 24-27.

Phys. Stat. Sol. (a)

A.A. Kaminskii, ???New room-temperature diode-laser-pumped efficient quasi-cw and cw single-mode laser based on monoclinic BaY2F8:Nd3+ crystal,??? Phys. Stat. Sol. (a) 137, 61-63 (1993).
[CrossRef]

Other

W. Koechner, Solid-State Laser Engineering (Springer, Berlin, 1996).

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Figures (4)

Fig. 1.
Fig. 1.

Output power as a function of the absorbed input power for the 2.6-mm Nd:BaYF sample (OC reflectivity R=91%).

Fig. 2.
Fig. 2.

Layout of the Q-switched Nd:BaYF laser. PUMP: fiber-coupled 25-W diode array; M1: 100-mm RoC mirror, HR at 1049 nm and HT at 806 nm; M2: 500-mm RoC mirror (HR at 1049 nm); M3: 250-mm RoC mirror (HR at 1049 nm); OC: output coupler; AOM: acousto-optic modulator. Mirror separations: M1-M2≈25 cm, M2-M3≈26 cm, M3-OC≈15 cm.

Fig. 3.
Fig. 3.

Output pulse energy and duration (fwhm) as a function of the repetition frequency (optimum OC with R=84%).

Fig. 4.
Fig. 4.

Output pulse energy at different pump levels (the corresponding cw output power is indicated in the inset). Continuous lines represent the numerical results.

Equations (3)

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E = E sat 2 ln ( 1 R ) ln ( g i g f )
g i g f = g t ln ( g i g f )
g i = g ( g g f ) e 1 ( f τ )

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