Abstract

We have demonstrated efficient, high-energy, narrow-spectral-bandwidth 2.128μm pulse generation by use of periodically poled MgO:LiNbO3 devices with a 36mm length and a 5mm×5mm large aperture. A free-running degenerated optical parametric oscillator (OPO) pumped with a Q-switched 1.064μm Nd:YAG laser exhibits a high slope efficiency of 75% and an optical-to-optical conversion efficiency of 70% with a broad spectral bandwidth (>100nm). In a configuration with a spectrally narrowed master oscillator followed by a power amplifier, we have achieved an output pulse energy of 52mJ with a spectral bandwidth of less than 2nm at the degeneracy point. The total optical-to-optical conversion efficiency of the system reached 50%.

© 2006 Optical Society of America

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References

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S. Haidar and H. Ito, Opt. Commun. 171, 171 (1999).
[CrossRef]

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S. J. Brosnan and R. L. Byer, IEEE J. Quantum Electron. 15, 415 (1979).
[CrossRef]

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J. E. Bjorkholm, IEEE J. Quantum Electron. 7, 109 (1971).
[CrossRef]

Aniolek, K. W.

Bisson, S. E.

Bjorkholm, J. E.

J. E. Bjorkholm, IEEE J. Quantum Electron. 7, 109 (1971).
[CrossRef]

Bosenberg, W. R.

Brosnan, S. J.

S. J. Brosnan and R. L. Byer, IEEE J. Quantum Electron. 15, 415 (1979).
[CrossRef]

Byer, R. L.

Caughey, T.

Dominic, V.

Eckardt, R. C.

Eckartdt, R. C.

Fejer, M. M.

Ganikhanov, F.

Haidar, S.

S. Haidar and H. Ito, Opt. Commun. 171, 171 (1999).
[CrossRef]

Harris, J. S.

Hellström, J.

Ishizuki, H.

Ito, H.

S. Haidar and H. Ito, Opt. Commun. 171, 171 (1999).
[CrossRef]

Karlsson, H.

Kulp, T. J.

Kuo, P. S.

Laurell, F.

Levi, O.

Missey, M. J.

Myers, L. E.

Pasiskevicius, V.

Pierce, J. W.

Pinguet, T. J.

Powers, P. E.

Richman, B. A.

Shoji, I.

Taira, T.

Vodopyanov, K. L.

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Figures (4)

Fig. 1
Fig. 1

Experimental setup for a MOPA system based on large aperture PPMgLNs. FI, Faraday isolator; HWP, half-wave plate; PBS, polarizing beam splitter; BC, beam combiner; OC, output coupler.

Fig. 2
Fig. 2

Output characteristics of degenerated PPMgLN OPO with spectral narrowing elements (filled circles) and free running (open circles). The solid lines are least-squares linear fits to the experimental data.

Fig. 3
Fig. 3

Output spectra of degenerated PPMgLN OPO with spectral narrowing elements (solid central curve) and free-running (dotted outer curve).

Fig. 4
Fig. 4

OPA output energy and conversion efficiency versus incident pump energy. The MO energy was 0.7 mJ pulse . Filled circles, amplified pulse energy; open circles, conversion efficiency. Inset, a typical amplified pulse spectrum at a pulse energy of 30 mJ with a 2 nm resolution.

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