Abstract

We have coherently combined a broad area laser diode array to obtain high power single-lobed output by using coherent polarization locking. The single-lobed coherent beam is achieved by spatially combining four diode emitters using walk-off crystals and waveplates while their phases are passively locked via polarization discrimination. While our previous work focused on coherent polarization locking of diode in Gaussian beams, we demonstrate in this paper, the feasibility of the same polarization discrimination for locking multimode beams from broad area diode lasers. The resonator is designed to mitigate the loss from smile effect by using retro-reflection feedback in the cavity. In a 980 nm diode array, we produced 7.2 W coherent output with M2 of 1.5 x 11.5. The brightness of the diode is improved by more than an order of magnitude.

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2010 (2)

2009 (2)

S. P. Ng and P. B. Phua, “Coherent polarization locking of a diode emitter array,” Opt. Lett. 34(13), 2042–2044 (2009).
[CrossRef] [PubMed]

F. Hoos, T. P. Meyrath, S. Li, B. Braun, and H. Giessen, “Femtosecond 5-W Yb:KGW slab laser oscillator pumped by a single broad-area diode and its application as supercontinuum source,” Appl. Phys. B 96(1), 5–10 (2009).
[CrossRef]

2008 (2)

2007 (2)

2006 (4)

P. B. Phua and Y. L. Lim, “Coherent polarization locking with near-perfect combining efficiency,” Opt. Lett. 31(14), 2148–2150 (2006).
[CrossRef] [PubMed]

T. M. Shay, V. Benham, J. T. Baker, B. Ward, A. D. Sanchez, M. A. Culpepper, D. Pilkington, J. Spring, D. J. Nelson, and C. A. Lu, “First experimental demonstration of self-synchronous phase locking of an optical array,” Opt. Express 14(25), 12015–12021 (2006).
[CrossRef] [PubMed]

F. Dittmar, B. Sumpf, J. Fricke, G. Erbert, and G. Trankle, “High-power 808-nm tapered diode lasers with nearly diffraction-limited beam quality of M-2=1.9 at P=4.4 W,” IEEE Photon. Technol. Lett. 18(4), 601–603 (2006).
[CrossRef]

Q. Li, P. F. Zhao, and W. R. Guo, “Amplitude compensation of a diode laser array phase locked with a Talbot cavity,” Appl. Phys. Lett. 89(23), 231120 (2006).
[CrossRef]

2005 (1)

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

2004 (1)

2002 (2)

V. Raab and R. Menzel, “External resonator design for high-power laser diodes that yields 400mW of TEM(00) power,” Opt. Lett. 27(3), 167–169 (2002).
[CrossRef]

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, “Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,” Appl. Phys, B-Lasers Opt. 75(4–5), 503–507 (2002).
[CrossRef]

2001 (1)

2000 (1)

1997 (1)

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

1996 (2)

J. N. Walpole, “Semiconductor amplifiers and lasers with tapered gain regions,” Opt. Quantum Electron. 28(6), 623–645 (1996).
[CrossRef]

R. M. R. Pillai and E. M. Garmire, “Paraxial-misalignment insensitive external-cavity semiconductor-laser array emitting near-diffraction limited single-lobed beam,” IEEE J. Quantum Electron. 32(6), 996–1008 (1996).
[CrossRef]

1991 (2)

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

D. Botez, M. Jansen, L. J. Mawst, G. Peterson, and T. J. Roth, “Watt-range, coherent, uniphase powers from phase-locked arrays of antiguided diode-lasers,” Appl. Phys. Lett. 58(19), 2070–2072 (1991).
[CrossRef]

1990 (1)

J. M. Verdiell and R. Frey, “A broad-area mode-coupling model for multiple-stripe semiconductor-lasers,” IEEE J. Quantum Electron. 26(2), 270–279 (1990).
[CrossRef]

1989 (2)

F. X. D’Amato, E. T. Siebert, and C. Roychoudhuri, “Coherent operation of an array of diode-lasers using a spatial filter in a Talbot cavity,” Appl. Phys. Lett. 55(9), 816–818 (1989).
[CrossRef]

D. Botez, L. J. Mawst, G. Peterson, and T. J. Roth, “Resonant optical-transmission and coupling in phase-locked diode-laser arrays of antiguides - the resonant optical wave-guide array,” Appl. Phys. Lett. 54(22), 2183–2185 (1989).
[CrossRef]

Abdolvand, A.

Au, J. A.

Baker, J. T.

Barthelemy, A.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, “Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,” Appl. Phys, B-Lasers Opt. 75(4–5), 503–507 (2002).
[CrossRef]

Beach, R. J.

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Benedick, A.

Benham, V.

Botez, D.

D. Botez, M. Jansen, L. J. Mawst, G. Peterson, and T. J. Roth, “Watt-range, coherent, uniphase powers from phase-locked arrays of antiguided diode-lasers,” Appl. Phys. Lett. 58(19), 2070–2072 (1991).
[CrossRef]

D. Botez, L. J. Mawst, G. Peterson, and T. J. Roth, “Resonant optical-transmission and coupling in phase-locked diode-laser arrays of antiguides - the resonant optical wave-guide array,” Appl. Phys. Lett. 54(22), 2183–2185 (1989).
[CrossRef]

Braiman, Y.

Bratcher, A.

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent Polarization Beam Combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

Braun, B.

F. Hoos, T. P. Meyrath, S. Li, B. Braun, and H. Giessen, “Femtosecond 5-W Yb:KGW slab laser oscillator pumped by a single broad-area diode and its application as supercontinuum source,” Appl. Phys. B 96(1), 5–10 (2009).
[CrossRef]

Brunner, F.

Chann, B.

Culpepper, M. A.

D’Amato, F. X.

F. X. D’Amato, E. T. Siebert, and C. Roychoudhuri, “Coherent operation of an array of diode-lasers using a spatial filter in a Talbot cavity,” Appl. Phys. Lett. 55(9), 816–818 (1989).
[CrossRef]

Davidson, N.

Demirbas, U.

Desfarges-Berthelemot, A.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, “Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,” Appl. Phys, B-Lasers Opt. 75(4–5), 503–507 (2002).
[CrossRef]

Dittmar, F.

F. Dittmar, B. Sumpf, J. Fricke, G. Erbert, and G. Trankle, “High-power 808-nm tapered diode lasers with nearly diffraction-limited beam quality of M-2=1.9 at P=4.4 W,” IEEE Photon. Technol. Lett. 18(4), 601–603 (2006).
[CrossRef]

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

Emanuel, M. A.

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Erbert, G.

F. Dittmar, B. Sumpf, J. Fricke, G. Erbert, and G. Trankle, “High-power 808-nm tapered diode lasers with nearly diffraction-limited beam quality of M-2=1.9 at P=4.4 W,” IEEE Photon. Technol. Lett. 18(4), 601–603 (2006).
[CrossRef]

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

Fan, T. Y.

Frey, R.

J. M. Verdiell and R. Frey, “A broad-area mode-coupling model for multiple-stripe semiconductor-lasers,” IEEE J. Quantum Electron. 26(2), 270–279 (1990).
[CrossRef]

Fricke, J.

F. Dittmar, B. Sumpf, J. Fricke, G. Erbert, and G. Trankle, “High-power 808-nm tapered diode lasers with nearly diffraction-limited beam quality of M-2=1.9 at P=4.4 W,” IEEE Photon. Technol. Lett. 18(4), 601–603 (2006).
[CrossRef]

Friesem, A. A.

Fujimoto, J. G.

Garmire, E. M.

R. M. R. Pillai and E. M. Garmire, “Paraxial-misalignment insensitive external-cavity semiconductor-laser array emitting near-diffraction limited single-lobed beam,” IEEE J. Quantum Electron. 32(6), 996–1008 (1996).
[CrossRef]

Giessen, H.

F. Hoos, T. P. Meyrath, S. Li, B. Braun, and H. Giessen, “Femtosecond 5-W Yb:KGW slab laser oscillator pumped by a single broad-area diode and its application as supercontinuum source,” Appl. Phys. B 96(1), 5–10 (2009).
[CrossRef]

Gopinath, J. T.

Guo, W. R.

Q. Li, P. F. Zhao, and W. R. Guo, “Amplitude compensation of a diode laser array phase locked with a Talbot cavity,” Appl. Phys. Lett. 89(23), 231120 (2006).
[CrossRef]

Harder, C.

Hoos, F.

F. Hoos, T. P. Meyrath, S. Li, B. Braun, and H. Giessen, “Femtosecond 5-W Yb:KGW slab laser oscillator pumped by a single broad-area diode and its application as supercontinuum source,” Appl. Phys. B 96(1), 5–10 (2009).
[CrossRef]

Ishaaya, A. A.

Jansen, M.

D. Botez, M. Jansen, L. J. Mawst, G. Peterson, and T. J. Roth, “Watt-range, coherent, uniphase powers from phase-locked arrays of antiguided diode-lasers,” Appl. Phys. Lett. 58(19), 2070–2072 (1991).
[CrossRef]

Kärtner, F. X.

Keller, U.

F. Brunner, G. J. Spühler, J. A. Au, L. Krainer, F. Morier-Genoud, R. Paschotta, N. Lichtenstein, S. Weiss, C. Harder, A. A. Lagatsky, A. Abdolvand, N. V. Kuleshov, and U. Keller, “Diode-pumped femtosecond Yb:KGd(WO(4))(2) laser with 1.1-W average power,” Opt. Lett. 25(15), 1119–1121 (2000).
[CrossRef]

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Kermene, V.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, “Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,” Appl. Phys, B-Lasers Opt. 75(4–5), 503–507 (2002).
[CrossRef]

Kewitsch, A.

Kopf, D.

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Krainer, L.

Kuleshov, N. V.

Lagatsky, A. A.

Li, Q.

Q. Li, P. F. Zhao, and W. R. Guo, “Amplitude compensation of a diode laser array phase locked with a Talbot cavity,” Appl. Phys. Lett. 89(23), 231120 (2006).
[CrossRef]

Li, S.

F. Hoos, T. P. Meyrath, S. Li, B. Braun, and H. Giessen, “Femtosecond 5-W Yb:KGW slab laser oscillator pumped by a single broad-area diode and its application as supercontinuum source,” Appl. Phys. B 96(1), 5–10 (2009).
[CrossRef]

Liang, W.

Lichtenstein, N.

Lim, Y. L.

Liu, B.

Liu, H.

Liu, Y.

Lu, C. A.

Mawst, L. J.

D. Botez, M. Jansen, L. J. Mawst, G. Peterson, and T. J. Roth, “Watt-range, coherent, uniphase powers from phase-locked arrays of antiguided diode-lasers,” Appl. Phys. Lett. 58(19), 2070–2072 (1991).
[CrossRef]

D. Botez, L. J. Mawst, G. Peterson, and T. J. Roth, “Resonant optical-transmission and coupling in phase-locked diode-laser arrays of antiguides - the resonant optical wave-guide array,” Appl. Phys. Lett. 54(22), 2183–2185 (1989).
[CrossRef]

Mehuys, D.

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

Menzel, R.

Meyrath, T. P.

F. Hoos, T. P. Meyrath, S. Li, B. Braun, and H. Giessen, “Femtosecond 5-W Yb:KGW slab laser oscillator pumped by a single broad-area diode and its application as supercontinuum source,” Appl. Phys. B 96(1), 5–10 (2009).
[CrossRef]

Morier-Genoud, F.

Moser, M.

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Mourou, G.

Nam, D.

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

Nees, J.

Nelson, D. J.

Ng, S. P.

Paschke, K.

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

Paschotta, R.

Peterson, G.

D. Botez, M. Jansen, L. J. Mawst, G. Peterson, and T. J. Roth, “Watt-range, coherent, uniphase powers from phase-locked arrays of antiguided diode-lasers,” Appl. Phys. Lett. 58(19), 2070–2072 (1991).
[CrossRef]

D. Botez, L. J. Mawst, G. Peterson, and T. J. Roth, “Resonant optical-transmission and coupling in phase-locked diode-laser arrays of antiguides - the resonant optical wave-guide array,” Appl. Phys. Lett. 54(22), 2183–2185 (1989).
[CrossRef]

Phua, P. B.

Pilkington, D.

Pillai, R. M. R.

R. M. R. Pillai and E. M. Garmire, “Paraxial-misalignment insensitive external-cavity semiconductor-laser array emitting near-diffraction limited single-lobed beam,” IEEE J. Quantum Electron. 32(6), 996–1008 (1996).
[CrossRef]

Raab, V.

Rakuljic, G.

Roth, T. J.

D. Botez, M. Jansen, L. J. Mawst, G. Peterson, and T. J. Roth, “Watt-range, coherent, uniphase powers from phase-locked arrays of antiguided diode-lasers,” Appl. Phys. Lett. 58(19), 2070–2072 (1991).
[CrossRef]

D. Botez, L. J. Mawst, G. Peterson, and T. J. Roth, “Resonant optical-transmission and coupling in phase-locked diode-laser arrays of antiguides - the resonant optical wave-guide array,” Appl. Phys. Lett. 54(22), 2183–2185 (1989).
[CrossRef]

Roychoudhuri, C.

F. X. D’Amato, E. T. Siebert, and C. Roychoudhuri, “Coherent operation of an array of diode-lasers using a spatial filter in a Talbot cavity,” Appl. Phys. Lett. 55(9), 816–818 (1989).
[CrossRef]

Sabourdy, D.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, “Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,” Appl. Phys, B-Lasers Opt. 75(4–5), 503–507 (2002).
[CrossRef]

Sanchez, A. D.

Sanchez-Rubio, A.

Scifres, D.

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

Sennaroglu, A.

Shay, T. M.

Shimshi, L.

Siddiqui, A.

Siebert, E. T.

F. X. D’Amato, E. T. Siebert, and C. Roychoudhuri, “Coherent operation of an array of diode-lasers using a spatial filter in a Talbot cavity,” Appl. Phys. Lett. 55(9), 816–818 (1989).
[CrossRef]

Skidmore, J. A.

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Spring, J.

Spühler, G. J.

Staske, R.

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

Streifer, W.

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

Sumpf, B.

F. Dittmar, B. Sumpf, J. Fricke, G. Erbert, and G. Trankle, “High-power 808-nm tapered diode lasers with nearly diffraction-limited beam quality of M-2=1.9 at P=4.4 W,” IEEE Photon. Technol. Lett. 18(4), 601–603 (2006).
[CrossRef]

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

Tiemann, B. G.

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent Polarization Beam Combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

Trankle, G.

F. Dittmar, B. Sumpf, J. Fricke, G. Erbert, and G. Trankle, “High-power 808-nm tapered diode lasers with nearly diffraction-limited beam quality of M-2=1.9 at P=4.4 W,” IEEE Photon. Technol. Lett. 18(4), 601–603 (2006).
[CrossRef]

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

Uberna, R.

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent Polarization Beam Combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

Vampouille, M.

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, “Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,” Appl. Phys, B-Lasers Opt. 75(4–5), 503–507 (2002).
[CrossRef]

Verdiell, J. M.

J. M. Verdiell and R. Frey, “A broad-area mode-coupling model for multiple-stripe semiconductor-lasers,” IEEE J. Quantum Electron. 26(2), 270–279 (1990).
[CrossRef]

Waarts, R.

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

Walpole, J. N.

J. N. Walpole, “Semiconductor amplifiers and lasers with tapered gain regions,” Opt. Quantum Electron. 28(6), 623–645 (1996).
[CrossRef]

Ward, B.

Weingarten, K. J.

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Weiss, S.

Welch, D.

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

Wenzel, H.

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

Yariv, A.

Zhang, G.

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Zhao, P. F.

Q. Li, P. F. Zhao, and W. R. Guo, “Amplitude compensation of a diode laser array phase locked with a Talbot cavity,” Appl. Phys. Lett. 89(23), 231120 (2006).
[CrossRef]

Appl. Phys, B-Lasers Opt. (1)

D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, M. Vampouille, and A. Barthelemy, “Coherent combining of two Nd:YAG lasers in a Vernier-Michelson-type cavity,” Appl. Phys, B-Lasers Opt. 75(4–5), 503–507 (2002).
[CrossRef]

Appl. Phys. B (2)

F. Hoos, T. P. Meyrath, S. Li, B. Braun, and H. Giessen, “Femtosecond 5-W Yb:KGW slab laser oscillator pumped by a single broad-area diode and its application as supercontinuum source,” Appl. Phys. B 96(1), 5–10 (2009).
[CrossRef]

D. Kopf, K. J. Weingarten, G. Zhang, M. Moser, M. A. Emanuel, R. J. Beach, J. A. Skidmore, and U. Keller, “High-average-power diode-pumped femtosecond Cr:LiSAF lasers,” Appl. Phys. B 65(2), 235–243 (1997).
[CrossRef]

Appl. Phys. Lett. (5)

D. Botez, L. J. Mawst, G. Peterson, and T. J. Roth, “Resonant optical-transmission and coupling in phase-locked diode-laser arrays of antiguides - the resonant optical wave-guide array,” Appl. Phys. Lett. 54(22), 2183–2185 (1989).
[CrossRef]

Q. Li, P. F. Zhao, and W. R. Guo, “Amplitude compensation of a diode laser array phase locked with a Talbot cavity,” Appl. Phys. Lett. 89(23), 231120 (2006).
[CrossRef]

F. X. D’Amato, E. T. Siebert, and C. Roychoudhuri, “Coherent operation of an array of diode-lasers using a spatial filter in a Talbot cavity,” Appl. Phys. Lett. 55(9), 816–818 (1989).
[CrossRef]

R. Waarts, D. Mehuys, D. Nam, D. Welch, W. Streifer, and D. Scifres, “High-power, cw, diffraction-limited, GaAlAs laser diode-array in an external Talbot cavity,” Appl. Phys. Lett. 58(23), 2586–2588 (1991).
[CrossRef]

D. Botez, M. Jansen, L. J. Mawst, G. Peterson, and T. J. Roth, “Watt-range, coherent, uniphase powers from phase-locked arrays of antiguided diode-lasers,” Appl. Phys. Lett. 58(19), 2070–2072 (1991).
[CrossRef]

IEEE J. Quantum Electron. (3)

R. Uberna, A. Bratcher, and B. G. Tiemann, “Coherent Polarization Beam Combination,” IEEE J. Quantum Electron. 46(8), 1191–1196 (2010).
[CrossRef]

J. M. Verdiell and R. Frey, “A broad-area mode-coupling model for multiple-stripe semiconductor-lasers,” IEEE J. Quantum Electron. 26(2), 270–279 (1990).
[CrossRef]

R. M. R. Pillai and E. M. Garmire, “Paraxial-misalignment insensitive external-cavity semiconductor-laser array emitting near-diffraction limited single-lobed beam,” IEEE J. Quantum Electron. 32(6), 996–1008 (1996).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (1)

K. Paschke, B. Sumpf, F. Dittmar, G. Erbert, R. Staske, H. Wenzel, and G. Trankle, “Nearly diffraction limited 980-nm tapered diode lasers with an output power of 7.7 W,” IEEE J. Sel. Top. Quantum Electron. 11(5), 1223–1227 (2005).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

F. Dittmar, B. Sumpf, J. Fricke, G. Erbert, and G. Trankle, “High-power 808-nm tapered diode lasers with nearly diffraction-limited beam quality of M-2=1.9 at P=4.4 W,” IEEE Photon. Technol. Lett. 18(4), 601–603 (2006).
[CrossRef]

Opt. Express (5)

Opt. Lett. (7)

Opt. Quantum Electron. (1)

J. N. Walpole, “Semiconductor amplifiers and lasers with tapered gain regions,” Opt. Quantum Electron. 28(6), 623–645 (1996).
[CrossRef]

Other (3)

M. T. Kelemen, F. Rinner, J. Rogg, N. Wiedmann, R. Kiefer, M. Walther, M. Mikulla, and G. Weimann, “High-power high-brightness ridge-waveguide tapered diode lasers at 940 nm,” in Test and Measurement Applications of Optoelectronic Devices, A. K. Chin, N. K. Dutta, R. W. Herrick, K. J. Linden, and D. J. McGraw, eds. (2002), pp. 75–81.

R. K. Huang, B. Chann, L. J. Missagia, S. J. Augst, R. B. Swint, J. P. Donnelly, A. Sanchez-Rubio, and G. W. Turner, “High-Power Coherent Beam Combination of Semiconductor Laser Arrays,” CLEO 2008, paper CMN1.

Lumics, “1064 nm Double Emitter Laser Diode on F-Mount up to 17W c.w. or 25W Pulsed Power.” http://www.lumics.com/fileadmin/user_upload/Datasheets_Lumics_Products/Multimode/Fmount/LU1064F170.pdf .

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Figures (4)

Fig. 1
Fig. 1

Illustration of smile effect compensation by using retro-reflection feedback.

Fig. 2
Fig. 2

Schematic of the spatial combination of emissions from four emitters by cascades of walk-off crystals and half waveplates. The beams are shown in their state of polarizations with ray tracings from individual emitters.

Fig. 3
Fig. 3

Diagram of the experimental setup as viewed from the top. The lines represent the ray tracing of the laser.

Fig. 4
Fig. 4

Beam measurement at maximum output power 7.2 W. (a) Caustic measurement in the slow axis with ωo = 227 μm and M2 = 11.5. (b) Far field pattern of the output beam in the slow axis at the minimum waist. (c) Output spectrum. The dashed line denotes the modulation envelopes.

Equations (3)

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L 1 - L 3 = ( n - 1 ) t .
L 2 - L 3 = ( n - 1 ) t + ( n e - n o ) d .
L 4 - L 3 = ( n e - n o ) d .

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