Abstract

We present our work on the coherent combining of an array of diode emitters in a conventional diode bar configuration using the coherent polarization locking technique. An external laser cavity is designed so that the diode emissions from four diode emitters are spatially overlapped and passively phase locked via a series of birefringent walk-off crystals and a polarizing beam splitter. This concept was experimentally demonstrated up to 1030mW of coherently combined power and was shown to increase the laser brightness of the diode bar by approximately 50 times.

© 2009 Optical Society of America

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2008

2006

F. Causa, S. Bonora, D. Masanotti, and P. Villoresi, Proc. SPIE 6368, 63680A-1 (2006).

P. B. Phua and Y. L. Lim, Opt. Lett. 31, 2148 (2006).
[CrossRef] [PubMed]

2004

1975

E. M. Philipp Rutz, Appl. Phys. Lett. 26, 475 (1975).
[CrossRef]

1966

M. J. DiDomenico, Appl. Phys. Lett. 8, 20 (1966).
[CrossRef]

Andre, T.

T. Andre, M. Jens, B. Peter, B. Colin, and B. Daniel, Proc. SPIE 6876, 68760U-1 (2008).

Bellanger, C.

Bonora, S.

F. Causa, S. Bonora, D. Masanotti, and P. Villoresi, Proc. SPIE 6368, 63680A-1 (2006).

Bourdet, G.

Brignon, A.

Calligaro, M.

Causa, F.

F. Causa, S. Bonora, D. Masanotti, and P. Villoresi, Proc. SPIE 6368, 63680A-1 (2006).

Colin, B.

T. Andre, M. Jens, B. Peter, B. Colin, and B. Daniel, Proc. SPIE 6876, 68760U-1 (2008).

Colineau, J.

Daniel, B.

T. Andre, M. Jens, B. Peter, B. Colin, and B. Daniel, Proc. SPIE 6876, 68760U-1 (2008).

Davidson, N.

Demirbas, U.

DiDomenico, M. J.

M. J. DiDomenico, Appl. Phys. Lett. 8, 20 (1966).
[CrossRef]

Fornahl, U.

U. Fornahl, M. Revermann, and J. Meinschien, Proc. SPIE 6876, 68760X-1 (2008).

Friesem, A.

Fujimoto, J. G.

Hassiaoui, I.

Huignard, J. P.

Ishaaya, A.

Jens, M.

T. Andre, M. Jens, B. Peter, B. Colin, and B. Daniel, Proc. SPIE 6876, 68760U-1 (2008).

Kartner, F. X.

Krakowski, M.

Lecomte, M.

Lim, Y. L.

Masanotti, D.

F. Causa, S. Bonora, D. Masanotti, and P. Villoresi, Proc. SPIE 6368, 63680A-1 (2006).

Mc Bride, R. M.

Meinschien, J.

U. Fornahl, M. Revermann, and J. Meinschien, Proc. SPIE 6876, 68760X-1 (2008).

Michel, N.

Parillaud, O.

Peter, B.

T. Andre, M. Jens, B. Peter, B. Colin, and B. Daniel, Proc. SPIE 6876, 68760U-1 (2008).

Philipp Rutz, E. M.

E. M. Philipp Rutz, Appl. Phys. Lett. 26, 475 (1975).
[CrossRef]

Phua, P. B.

Revermann, M.

U. Fornahl, M. Revermann, and J. Meinschien, Proc. SPIE 6876, 68760X-1 (2008).

Sennaroglu, A.

Shimshi, L.

Villoresi, P.

F. Causa, S. Bonora, D. Masanotti, and P. Villoresi, Proc. SPIE 6368, 63680A-1 (2006).

Appl. Opt.

Appl. Phys. Lett.

M. J. DiDomenico, Appl. Phys. Lett. 8, 20 (1966).
[CrossRef]

E. M. Philipp Rutz, Appl. Phys. Lett. 26, 475 (1975).
[CrossRef]

Opt. Express

Opt. Lett.

Proc. SPIE

T. Andre, M. Jens, B. Peter, B. Colin, and B. Daniel, Proc. SPIE 6876, 68760U-1 (2008).

F. Causa, S. Bonora, D. Masanotti, and P. Villoresi, Proc. SPIE 6368, 63680A-1 (2006).

U. Fornahl, M. Revermann, and J. Meinschien, Proc. SPIE 6876, 68760X-1 (2008).

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Figures (4)

Fig. 1
Fig. 1

Schematic drawing of the coherent polarization locking of a diode emitter array. LD, laser diode.

Fig. 2
Fig. 2

Design structure of a birefringent wedge pair and the observed beam profile of the polarization conversion effect. Results are analyzed by a polarizer whose transmission axis at (i) vertical and (ii) horizontal.

Fig. 3
Fig. 3

Birefringent Y V O 4 crystals series. The arrows shown are optic axes of the various crystals. (a) Illustrated laser beam cross sections. (b) Observed laser beam profiles when light propagating through the crystals stack.

Fig. 4
Fig. 4

Output power versus current of the coherently locked laser.

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