Abstract

We demonstrate off-axis spectral beam combining applied to a 980 nm high power broad area diode laser bar. The experiments yielded 9 W of optical power at 30 A of operating current and the measured M 2 values of the combined beam from 12 emitters were 1.9 and 6.4 for the fast and the slow axis, respectively. The slow axis beam quality was 5-6 times better than the value obtained from a single emitter in free running mode. A high brightness of 79 MW/cm2-str was achieved using this configuration. To our knowledge, this is the highest brightness level ever achieved from a broad area diode laser bar.

© 2009 Optical Society of America

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  1. L. Li, "The advances and characteristics of high-power diode laser materials processing," Opt. Laser. Eng. 34, 231-253 (2000).
    [CrossRef]
  2. H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
    [CrossRef]
  3. M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (2005).
    [CrossRef]
  4. Y. Zheng, X. Gao, H. Miyajima, and H. Kan, "Divergence-narrowed external-cavity broad-area laser-diode array," J. Appl. Phys. 95, 6489-6491 (2004).
    [CrossRef]
  5. 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, 2586-2588 (1991).
    [CrossRef]
  6. V. Daneu, A. Sanchez, T. Y. Fan, H. K. Choi, G. W. Turner, and C. C. Cook, "Spectral beam combining of a broad-stripe diode laser array in an external cavity," Opt. Lett. 25, 405-407 (2000).
    [CrossRef]
  7. J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
    [CrossRef]
  8. R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
    [CrossRef]
  9. J. T. Gopinath, B. Chann, T. Y. Fan, and A. Sanchez "1450-nm high-brightness wavelength-beam combined diode laser array," Opt. Express 16, 9405-9410 (2008).
    [CrossRef] [PubMed]
  10. O. B. Jensen, B. Thestrup, P. E. Andersen, and P. M. Petersen, "Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining," Appl. Phys. B 83, 225-228 (2006).
    [CrossRef]
  11. A. Jechow, V. Raab, and R. Menzel, "High cw power using an external cavity for spectral beam combining of diode laser-bar emission," Appl. Opt. 45, 3545-3547 (2006).
    [CrossRef] [PubMed]
  12. S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, "Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results," IEEE J. Quantum Electron. 39, 448-458 (2003).
    [CrossRef]
  13. B. Thestrup, M. Chi, and P. M. Petersen, "Lateral mode selection in a broad-area laser diode by self-injection locking with a mirror stripe," Proc. SPIE 5336, 38 (2004).
    [CrossRef]
  14. R. Diehl (Ed.), High-Power Diode Lasers: Fundamentals, Technology, Applications (Springer-Verlag, Berlin Heidelberg, 2000).
    [CrossRef]

2008

2007

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

2006

O. B. Jensen, B. Thestrup, P. E. Andersen, and P. M. Petersen, "Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining," Appl. Phys. B 83, 225-228 (2006).
[CrossRef]

A. Jechow, V. Raab, and R. Menzel, "High cw power using an external cavity for spectral beam combining of diode laser-bar emission," Appl. Opt. 45, 3545-3547 (2006).
[CrossRef] [PubMed]

2005

M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (2005).
[CrossRef]

2004

Y. Zheng, X. Gao, H. Miyajima, and H. Kan, "Divergence-narrowed external-cavity broad-area laser-diode array," J. Appl. Phys. 95, 6489-6491 (2004).
[CrossRef]

B. Thestrup, M. Chi, and P. M. Petersen, "Lateral mode selection in a broad-area laser diode by self-injection locking with a mirror stripe," Proc. SPIE 5336, 38 (2004).
[CrossRef]

2003

S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, "Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results," IEEE J. Quantum Electron. 39, 448-458 (2003).
[CrossRef]

2002

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

2000

1993

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

1991

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, 2586-2588 (1991).
[CrossRef]

Andersen, P. E.

O. B. Jensen, B. Thestrup, P. E. Andersen, and P. M. Petersen, "Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining," Appl. Phys. B 83, 225-228 (2006).
[CrossRef]

Bailey, R. J.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Botez, D.

M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (2005).
[CrossRef]

Cao, J. D.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Chann, B.

J. T. Gopinath, B. Chann, T. Y. Fan, and A. Sanchez "1450-nm high-brightness wavelength-beam combined diode laser array," Opt. Express 16, 9405-9410 (2008).
[CrossRef] [PubMed]

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

Chi, M.

B. Thestrup, M. Chi, and P. M. Petersen, "Lateral mode selection in a broad-area laser diode by self-injection locking with a mirror stripe," Proc. SPIE 5336, 38 (2004).
[CrossRef]

Chinn, S. R.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Choi, H. K.

Cook, C. C.

Daneu, V.

Donnelly, J. P.

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Earles, T.

M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (2005).
[CrossRef]

Fan, T. Y.

Fouckhardt, H.

S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, "Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results," IEEE J. Quantum Electron. 39, 448-458 (2003).
[CrossRef]

Gao, X.

Y. Zheng, X. Gao, H. Miyajima, and H. Kan, "Divergence-narrowed external-cavity broad-area laser-diode array," J. Appl. Phys. 95, 6489-6491 (2004).
[CrossRef]

Goodnough, T. J.

M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (2005).
[CrossRef]

Gopinath, J. T.

Goyal, A. K.

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

Groves, S. H.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Harris, C. T.

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Huang, R.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Huang, R. K.

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

Jechow, A.

Jensen, O. B.

O. B. Jensen, B. Thestrup, P. E. Andersen, and P. M. Petersen, "Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining," Appl. Phys. B 83, 225-228 (2006).
[CrossRef]

Kan, H.

Y. Zheng, X. Gao, H. Miyajima, and H. Kan, "Divergence-narrowed external-cavity broad-area laser-diode array," J. Appl. Phys. 95, 6489-6491 (2004).
[CrossRef]

Kanskar, M.

M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (2005).
[CrossRef]

Laliberte, B. M.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Li, L.

L. Li, "The advances and characteristics of high-power diode laser materials processing," Opt. Laser. Eng. 34, 231-253 (2000).
[CrossRef]

Mawst, L. J.

M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (2005).
[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, 2586-2588 (1991).
[CrossRef]

Menzel, R.

Minns, R. A.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Missaggia, L. J.

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Miyajima, H.

Y. Zheng, X. Gao, H. Miyajima, and H. Kan, "Divergence-narrowed external-cavity broad-area laser-diode array," J. Appl. Phys. 95, 6489-6491 (2004).
[CrossRef]

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, 2586-2588 (1991).
[CrossRef]

Napoleone, A.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Petersen, P. M.

O. B. Jensen, B. Thestrup, P. E. Andersen, and P. M. Petersen, "Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining," Appl. Phys. B 83, 225-228 (2006).
[CrossRef]

B. Thestrup, M. Chi, and P. M. Petersen, "Lateral mode selection in a broad-area laser diode by self-injection locking with a mirror stripe," Proc. SPIE 5336, 38 (2004).
[CrossRef]

Plant, J.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Po, H.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Raab, V.

Robinson, R. F.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Rockney, B. H.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Rodionov, A.

S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, "Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results," IEEE J. Quantum Electron. 39, 448-458 (2003).
[CrossRef]

Sanchez, 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, 2586-2588 (1991).
[CrossRef]

Sherstobitov, V. E.

S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, "Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results," IEEE J. Quantum Electron. 39, 448-458 (2003).
[CrossRef]

Stiers, E.

M. Kanskar, T. Earles, T. J. Goodnough, E. Stiers, D. Botez, and L. J. Mawst, "73% CW power conversion efficiency at 50W from 970nm diode laser bars," Electron. Lett. 41, 245-247 (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, 2586-2588 (1991).
[CrossRef]

Taylor, P. J.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

Thestrup, B.

O. B. Jensen, B. Thestrup, P. E. Andersen, and P. M. Petersen, "Near-diffraction-limited segmented broad area diode laser based on off-axis spectral beam combining," Appl. Phys. B 83, 225-228 (2006).
[CrossRef]

B. Thestrup, M. Chi, and P. M. Petersen, "Lateral mode selection in a broad-area laser diode by self-injection locking with a mirror stripe," Proc. SPIE 5336, 38 (2004).
[CrossRef]

Tricca, R. R.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Turner, G. W.

R. K. Huang, B. Chann, L. J. Missaggia, J. P. Donnelly, C. T. Harris, G. W. Turner, A. K. Goyal, T. Y. Fan, and A. Sanchez, "High-Brightness Wavelength Beam Combined Semiconductor Laser Diode Arrays," IEEE Photon. Technol. Lett. 19,209-211 (2007).
[CrossRef]

V. Daneu, A. Sanchez, T. Y. Fan, H. K. Choi, G. W. Turner, and C. C. Cook, "Spectral beam combining of a broad-stripe diode laser array in an external cavity," Opt. Lett. 25, 405-407 (2000).
[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, 2586-2588 (1991).
[CrossRef]

Walpole, J. N.

J. N. Walpole, J. P. Donnelly, P. J. Taylor, L. J. Missaggia, C. T. Harris, R. J. Bailey, A. Napoleone, S. H. Groves, S. R. Chinn, R. Huang, and J. Plant, "Slab- coupled 1.3-μm semiconductor laser with single-spatial large-diameter mode," IEEE Photon. Technol. Lett. 14, 756-758 (2002).
[CrossRef]

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, 2586-2588 (1991).
[CrossRef]

Wolff, S.

S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, "Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results," IEEE J. Quantum Electron. 39, 448-458 (2003).
[CrossRef]

Zhang, Y. H.

H. Po, J. D. Cao, B. M. Laliberte, R. A. Minns, R. F. Robinson, B. H. Rockney, R. R. Tricca, and Y. H. Zhang, "High power neodymium-doped single transverse mode fibre laser," Electron. Lett. 29, 1500-1501 (1993).
[CrossRef]

Zheng, Y.

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S. Wolff, A. Rodionov, V. E. Sherstobitov, and H. Fouckhardt, "Fourier-Optical Transverse Mode Selection in External-Cavity Broad-Area Lasers: Experimental and Numerical Results," IEEE J. Quantum Electron. 39, 448-458 (2003).
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Figures (5)

Fig. 1.
Fig. 1.

A schematic of the top view of the off-axis spectral beam combining experimental setup.

Fig. 2.
Fig. 2.

Light-current characteristics of the laser bar with off-axis spectral beam combining (squares) and in free running mode (dots).

Fig. 3.
Fig. 3.

Optical spectrum of the laser bar with off axis spectral beam combining.

Fig. 4.
Fig. 4.

(a). Caustic of the fast axis of the beam (b) Caustic of the slow axis of the beam. The solid lines represent numerical fits to the experimental data.

Fig. 5.
Fig. 5.

(a). Fast axis beam profile at the focus of a 100 mm achromatic lens (b) Slow axis beam profile at the focus of a 100 mm achromatic lens.

Equations (4)

Equations on this page are rendered with MathJax. Learn more.

d f d α d λ Δ λ
d α d λ = 1 α cos α 0
W ( z ) = W 0 [ 1 + ( z λ M 2 π W o 2 ) 2 ] 1 2
B = P av λ 2 M x 2 M y 2

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