Abstract

Intracavity phase locking and extracavity combination of the two emitted beams generated by a Nd:YAG laser longitudinally pumped by two fiber-coupled diode lasers are investigated. Phase locking is performed by a diffractive component located inside a confocal Fabry–Perot resonator. The coherent addition of the two synchronized beams in a single TEM00 wave is made by a birefringent interferometer, with 96.8% energy yield. 610-mW output power was obtained in a single-lobed beam profile with 30.5% optical-to-optical conversion efficiency in the continuous-wave regime.

© 1996 Optical Society of America

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References

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1995 (2)

G. Lescroart, R. Muller, G. Bourdet, Opt. Commun. 115, 233 (1995).
[CrossRef]

J. Xu, K. K. Lee, Y. C. Chen, Opt. Commun. 117, 198 (1995).
[CrossRef]

1994 (2)

B. Colombeau, M. Vampouille, V. Kermene, A. Desfarges, C. Froehly, Pure Appl. Opt. 3, 757 (1994).
[CrossRef]

V. Couderc, O. Guy, A. Barthelemy, C. Froehly, F. Louradour, Opt. Lett. 15, 1134 (1994).

1993 (1)

1992 (1)

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, IEEE J. Quantum Electron. 28, 1142 (1992).
[CrossRef]

1990 (1)

J. M. Verdiell, H. Rajbenbach, J. P. Huignard, IEEE Photon. Technol. Lett. 2, 568 (1990).
[CrossRef]

1986 (1)

Barthelemy, A.

V. Couderc, O. Guy, A. Barthelemy, C. Froehly, F. Louradour, Opt. Lett. 15, 1134 (1994).

Bourdet, G.

G. Lescroart, R. Muller, G. Bourdet, Opt. Commun. 115, 233 (1995).
[CrossRef]

Chen, Y. C.

J. Xu, K. K. Lee, Y. C. Chen, Opt. Commun. 117, 198 (1995).
[CrossRef]

Colombeau, B.

B. Colombeau, M. Vampouille, V. Kermene, A. Desfarges, C. Froehly, Pure Appl. Opt. 3, 757 (1994).
[CrossRef]

Couderc, V.

V. Couderc, O. Guy, A. Barthelemy, C. Froehly, F. Louradour, Opt. Lett. 15, 1134 (1994).

Dändliker, R.

Desfarges, A.

B. Colombeau, M. Vampouille, V. Kermene, A. Desfarges, C. Froehly, Pure Appl. Opt. 3, 757 (1994).
[CrossRef]

Froehly, C.

B. Colombeau, M. Vampouille, V. Kermene, A. Desfarges, C. Froehly, Pure Appl. Opt. 3, 757 (1994).
[CrossRef]

V. Couderc, O. Guy, A. Barthelemy, C. Froehly, F. Louradour, Opt. Lett. 15, 1134 (1994).

Guy, O.

V. Couderc, O. Guy, A. Barthelemy, C. Froehly, F. Louradour, Opt. Lett. 15, 1134 (1994).

Huignard, J. P.

J. M. Verdiell, H. Rajbenbach, J. P. Huignard, IEEE Photon. Technol. Lett. 2, 568 (1990).
[CrossRef]

Kaneda, Y.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, IEEE J. Quantum Electron. 28, 1142 (1992).
[CrossRef]

Kermene, V.

B. Colombeau, M. Vampouille, V. Kermene, A. Desfarges, C. Froehly, Pure Appl. Opt. 3, 757 (1994).
[CrossRef]

Kubota, S.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, IEEE J. Quantum Electron. 28, 1142 (1992).
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J. Xu, K. K. Lee, Y. C. Chen, Opt. Commun. 117, 198 (1995).
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[CrossRef]

Louradour, F.

V. Couderc, O. Guy, A. Barthelemy, C. Froehly, F. Louradour, Opt. Lett. 15, 1134 (1994).

Masuda, H.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, IEEE J. Quantum Electron. 28, 1142 (1992).
[CrossRef]

Morel, J.

Muller, R.

G. Lescroart, R. Muller, G. Bourdet, Opt. Commun. 115, 233 (1995).
[CrossRef]

Oka, M.

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, IEEE J. Quantum Electron. 28, 1142 (1992).
[CrossRef]

Rajbenbach, H.

J. M. Verdiell, H. Rajbenbach, J. P. Huignard, IEEE Photon. Technol. Lett. 2, 568 (1990).
[CrossRef]

Swanson, G. J.

Vampouille, M.

B. Colombeau, M. Vampouille, V. Kermene, A. Desfarges, C. Froehly, Pure Appl. Opt. 3, 757 (1994).
[CrossRef]

Veldkamp, W. B.

Verdiell, J. M.

J. M. Verdiell, H. Rajbenbach, J. P. Huignard, IEEE Photon. Technol. Lett. 2, 568 (1990).
[CrossRef]

Woodtli, A.

Xu, J.

J. Xu, K. K. Lee, Y. C. Chen, Opt. Commun. 117, 198 (1995).
[CrossRef]

IEEE J. Quantum Electron. (1)

M. Oka, H. Masuda, Y. Kaneda, S. Kubota, IEEE J. Quantum Electron. 28, 1142 (1992).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

J. M. Verdiell, H. Rajbenbach, J. P. Huignard, IEEE Photon. Technol. Lett. 2, 568 (1990).
[CrossRef]

Opt. Commun. (2)

G. Lescroart, R. Muller, G. Bourdet, Opt. Commun. 115, 233 (1995).
[CrossRef]

J. Xu, K. K. Lee, Y. C. Chen, Opt. Commun. 117, 198 (1995).
[CrossRef]

Opt. Lett. (3)

Pure Appl. Opt. (1)

B. Colombeau, M. Vampouille, V. Kermene, A. Desfarges, C. Froehly, Pure Appl. Opt. 3, 757 (1994).
[CrossRef]

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Figures (7)

Fig. 1
Fig. 1

Schematic diagram of the confocal Fabry–Perot cavity. Mirrors M1 and M2 are located in the focal (Fourier) planes of converging lens L.

Fig. 2
Fig. 2

Total output power before coherent combination as a function of incident pump power.

Fig. 3
Fig. 3

Evolution of the modal structure in the plane of mirror M2 versus interfiber separation Δl (uncontrolled coupling).

Fig. 4
Fig. 4

Evolution of the modal structure in the plane of mirror M2 versus pump power (uncontrolled coupling).

Fig. 5
Fig. 5

Modal structure versus pump power with a diffractive component located in the plane of mirror M2 (phase locking).

Fig. 6
Fig. 6

Schematic diagram of the birefringent interferometer used to combine the two phase-locked beams.

Fig. 7
Fig. 7

Combined beam profiles: (a) in the output plane of the Wollaston prism: 1/e2 intensity beam radius ω0 = 316 μm; ( b) far field (in the back focal plane of a lens): beam divergence θ = 1.23 mrad.

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