Abstract

We report on a simple design for a multi-GHz tunable-repetition-rate diode-pumped picosecond laser. Using a plano-Brewster Nd:GdVO4 crystal in a V-folded cavity employing only readily available commercial components, we achieved passive mode-locking with 4.4-ps pulses tunable in the range 2.5–2.7 GHz. This laser is meant to be employed in the MIR experiment that aims at the detection of the Schwinger radiation (dynamical Casimir effect).

© 2005 Optical Society of America

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References

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    [CrossRef]
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    [CrossRef]
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Appl. Phys. B

B. Braun, K. Weingarten, F.X. Kärtner, U. Keller, �??Continuous-wave mode-locked solid-state lasers with enhanced spatial hole-burning. Part I. Experiments,�?? Appl. Phys. B 61, 429-437 (1995).
[CrossRef]

S. Forget, F. Balembois, P. Georges, P.-J. Devilder, �??A new 3D multipass amplifier based on Nd:YAG or Nd:YVO4 crystals,�?? Appl. Phys. B 75, 481-485 (2002).
[CrossRef]

Europhys. Lett.

C. Braggio, G. Bressi, G. Carugno, C. Del Noce, G. Galeazzi, A. Lombardi, A. Palmieri, G. Ruoso, D. Zanello, �??A novel experimental approach for the detection of the dynamical Casimir effect,�?? Europhys. Lett. 70, 754-760 (2005).
[CrossRef]

IEEE J. Quantum Electron.

L. Krainer, R. Paschotta, S. Lecomte, M. Moser, K. Weingarten, U. Keller, �??Compact Nd:YVO4 lasers with pulse repetition rates up to 160 GHz,�?? IEEE J. Quantum Electron. 38, 1331-1338 (2002).
[CrossRef]

S. Lecomte, M. Kalisch, L. Krainer, G.J. Spühler, R. Paschotta, M. Golling, D. Ebling, T. Ohgoh, T. Hayakawa, S. Pawlik, B. Schmidt, U. Keller, �??Diode-pumped passively mode-locked Nd:YVO4 lasers with 40-GHz repetition rate,�?? IEEE J. Quantum Electron. 41, 45-52 (2005).
[CrossRef]

T.Y. Fan, A. Sanchez, �??Pump source requirements for end-pumped lasers,�?? IEEE J. Quantum Electron. 26, 311-316 (1990).
[CrossRef]

J. Opt. Soc. Am. B

Opt. Lett.

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Figures (4)

Fig. 1.
Fig. 1.

Layout of the diode-pumped 2.6-GHz Nd:GdVO4 laser. L1 and L2 are aspheric lenses for collimation and focussing, respectively, and APP is the prism pair for slow-axis expansion.

Fig. 2.
Fig. 2.

Fresnel loss from the quasi-Brewster interface as a function of the angle offset. The inclination of the uncoated face yielding exact Brewster incidence is θ=24.52°.

Fig. 3.
Fig. 3.

Numerically computed critical output power for cw mode-locking (a) and waist radii (b) as a function of the repetition frequency. The waist radii on the SAM (wa ) as well as on the gain medium (wg ) are calculated (both for the tangential (t) and the sagittal (s) planes), near the 2.6-GHz edge of the stability region. Actually, the tangential waist radius within the laser crystal has to be multiplied by the refractive index n=2.192.

Fig. 4.
Fig. 4.

Non-collinear background-free second-harmonic autocorrelation and spectrum of the passively mode-locked laser (inset).

Equations (1)

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E c = F a F g A a A g Δ R

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