Abstract

A laser system that is based on second-harmonic generation of a broad area laser diode and provides 23.2 mW of diffraction-limited light with narrow bandwidth is described. It is tunable from 487.4 to 489nm. The broad area laser diode is frequency stabilized in an external cavity that yields 800 mW of diffraction-limited light. This infrared light is converted into the visible by use of a 1 cm periodically poled MgO:LiNbO3 bulk crystal with a measured single-pass conversion efficiency of up to 3.6%∕W × cm.

© 2007 Optical Society of America

Full Article  |  PDF Article

References

  • View by:
  • |
  • |
  • |

  1. T. Vo-Dinh, B. Cullum, and P. Kasili, "Development of a multispectral imaging system for medical applications," J. Phys. D 36, 1663-1668 (2003).
    [CrossRef]
  2. D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
    [CrossRef]
  3. A. Englander, R. Lavi, M. Katz, M. Oron, D. Eger, E. Lebiush, G. Rosenman, and A. Skliar, "Highly efficient doubling of a high-repetition-rate diode-pumped laser with bulk periodically poled KTP," Opt. Lett. 22, 1598-1599 (1997).
    [CrossRef]
  4. J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
    [CrossRef]
  5. R. G. Batchko, M. M. Fejer, R. L. Byer, D. Woll, R. Wallenstein, V. Y. Shur, and L. Erman, "Continuous-wave quasi-phase-matched generation of 60 mW at 465 nm by single-pass frequency doubling of a laser diode in backswitch-poled lithium niobate," Opt. Lett. 24, 1293-1295 (1999).
    [CrossRef]
  6. T. Sugita, K. Mizuuchi, Y. Kitaoka, and K. Yamamoto, "31%-efficient blue second-harmonic generation in a periodically poled MgOLiNbO3 waveguide by frequency doubling of an AlGaAs laser diode," Opt. Lett. 24, 1590-1592 (1999).
    [CrossRef]
  7. D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
    [CrossRef]
  8. D. Woll, J. Schumacher, A. Robertson, M. A. Tremont, R. Wallenstein, M. Katz, D. Eger, and A. Englander, "250 mW of coherent blue 460 nm light generated by single-pass frequency doubling of the output of a mode-locked high-power diode laser in periodically poled KTP," Opt. Lett. 27, 1055-1057 (2002).
    [CrossRef]
  9. E. U. Rafailov, W. Sibbett, A. Mooradian, J. G. McInerney, H. Karlsson, S. Wang, and F. Laurell, "Efficient frequency doubling of a vertical-extended-cavity surface-emitting laser diode by use of a periodically poled KTP crystal," Opt. Lett. 28, 2091-2093 (2003).
    [CrossRef] [PubMed]
  10. Z. Ye, Q. Lou, J. Dong, Y. Wei, and L. Lin, "Compact continuous-wave blue lasers by direct frequency doubling of laser diodes with periodically poled lithium niobate waveguide crystals," Opt. Lett. 30, 73-74 (2005).
    [CrossRef] [PubMed]
  11. E. Samsøe, P. M. Petersen, S. Andersson-Engels, and P. E. Andersen, "Second-harmonic generation of 405-nm light using periodically poled KTiOPO4 pumped by external-cavity laser diode with double grating feedback," Appl. Phys. B 80, 861-864 (2005).
    [CrossRef]
  12. M. Chi, O. B. Jensen, J. Holm, C. Pedersen, P. E. Andersen, G. Erbert, B. Sumpf, and P. M. Petersen, "Tunable high-power narrow-linewidth semiconductor laser based on an external-cavity tapered amplifier," Opt. Express 13, 10589-10596 (2005).
    [CrossRef] [PubMed]
  13. M. Maiwald, S. Schwertfeger, R. Güther, B. Sumpf, K. Paschke, C. Dzionk, G. Erbert, and G. Tränkle, "600 mW optical output power at 488 nm by use of a high-power hybrid laser diode system and a periodically poled MgO:LiNbO3 bulk crystal," Opt. Lett. 31, 802-804 (2006).
    [CrossRef] [PubMed]
  14. V. Raab and R. Menzel, "External resonator design for high-power laser diodes that yields 400 mW of TEMlowbar00 power," Opt. Lett. 27, 167-169 (2002).
    [CrossRef]
  15. V. Raab, D. Skoczowsky, and R. Menzel, "Tuning high-power laser diodes with as much as 0.38 W of power and M 2 = 1.2 over a range of 32 nm with 3-GHz bandwidth," Opt. Lett. 27, 1995-1997 (2002).
    [CrossRef]
  16. G. D. Boyd and D. A. Kleinman, "Parametric interaction of focussed Gaussian light beams," J. Appl. Phys. 39, 3597-3637 (1968).
    [CrossRef]

2006 (1)

2005 (3)

2004 (1)

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

2003 (3)

T. Vo-Dinh, B. Cullum, and P. Kasili, "Development of a multispectral imaging system for medical applications," J. Phys. D 36, 1663-1668 (2003).
[CrossRef]

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

E. U. Rafailov, W. Sibbett, A. Mooradian, J. G. McInerney, H. Karlsson, S. Wang, and F. Laurell, "Efficient frequency doubling of a vertical-extended-cavity surface-emitting laser diode by use of a periodically poled KTP crystal," Opt. Lett. 28, 2091-2093 (2003).
[CrossRef] [PubMed]

2002 (3)

2001 (1)

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

1999 (2)

1997 (1)

1968 (1)

G. D. Boyd and D. A. Kleinman, "Parametric interaction of focussed Gaussian light beams," J. Appl. Phys. 39, 3597-3637 (1968).
[CrossRef]

Andersen, P. E.

E. Samsøe, P. M. Petersen, S. Andersson-Engels, and P. E. Andersen, "Second-harmonic generation of 405-nm light using periodically poled KTiOPO4 pumped by external-cavity laser diode with double grating feedback," Appl. Phys. B 80, 861-864 (2005).
[CrossRef]

M. Chi, O. B. Jensen, J. Holm, C. Pedersen, P. E. Andersen, G. Erbert, B. Sumpf, and P. M. Petersen, "Tunable high-power narrow-linewidth semiconductor laser based on an external-cavity tapered amplifier," Opt. Express 13, 10589-10596 (2005).
[CrossRef] [PubMed]

Andersson-Engels, S.

E. Samsøe, P. M. Petersen, S. Andersson-Engels, and P. E. Andersen, "Second-harmonic generation of 405-nm light using periodically poled KTiOPO4 pumped by external-cavity laser diode with double grating feedback," Appl. Phys. B 80, 861-864 (2005).
[CrossRef]

Batchko, R. G.

Birkin, D. J. L.

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

Bootz, F.

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

Boyd, G. D.

G. D. Boyd and D. A. Kleinman, "Parametric interaction of focussed Gaussian light beams," J. Appl. Phys. 39, 3597-3637 (1968).
[CrossRef]

Butterworth, S. D.

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

Byer, R. L.

Caprara, A. L.

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

Charles, J. P.

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

Chi, M.

Chilla, J. L.

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

Cullum, B.

T. Vo-Dinh, B. Cullum, and P. Kasili, "Development of a multispectral imaging system for medical applications," J. Phys. D 36, 1663-1668 (2003).
[CrossRef]

Dong, J.

Dzionk, C.

Eger, D.

Englander, A.

Erbert, G.

Erman, L.

Fejer, M. M.

Gerstner, A. O.

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

Güther, R.

Hanna, D. C.

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

Holm, J.

Jensen, O. B.

Karlsson, H.

Kasili, P.

T. Vo-Dinh, B. Cullum, and P. Kasili, "Development of a multispectral imaging system for medical applications," J. Phys. D 36, 1663-1668 (2003).
[CrossRef]

Katz, M.

Kitaoka, Y.

Kleinman, D. A.

G. D. Boyd and D. A. Kleinman, "Parametric interaction of focussed Gaussian light beams," J. Appl. Phys. 39, 3597-3637 (1968).
[CrossRef]

Laffers, W.

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

Laurell, F.

Lavi, R.

Lebiush, E.

Lenz, D.

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

Lin, L.

Lou, Q.

Maiwald, M.

McInerney, J. G.

Menzel, R.

Mizuuchi, K.

Mooradian, A.

Oron, M.

Paschke, K.

Pedersen, C.

Petersen, P. M.

E. Samsøe, P. M. Petersen, S. Andersson-Engels, and P. E. Andersen, "Second-harmonic generation of 405-nm light using periodically poled KTiOPO4 pumped by external-cavity laser diode with double grating feedback," Appl. Phys. B 80, 861-864 (2005).
[CrossRef]

M. Chi, O. B. Jensen, J. Holm, C. Pedersen, P. E. Andersen, G. Erbert, B. Sumpf, and P. M. Petersen, "Tunable high-power narrow-linewidth semiconductor laser based on an external-cavity tapered amplifier," Opt. Express 13, 10589-10596 (2005).
[CrossRef] [PubMed]

Raab, V.

Rafailov, E. U.

E. U. Rafailov, W. Sibbett, A. Mooradian, J. G. McInerney, H. Karlsson, S. Wang, and F. Laurell, "Efficient frequency doubling of a vertical-extended-cavity surface-emitting laser diode by use of a periodically poled KTP crystal," Opt. Lett. 28, 2091-2093 (2003).
[CrossRef] [PubMed]

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

Reed, M. K.

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

Robertson, A.

Rosenman, G.

Ross, G. W.

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

Samsøe, E.

E. Samsøe, P. M. Petersen, S. Andersson-Engels, and P. E. Andersen, "Second-harmonic generation of 405-nm light using periodically poled KTiOPO4 pumped by external-cavity laser diode with double grating feedback," Appl. Phys. B 80, 861-864 (2005).
[CrossRef]

Schumacher, J.

Schwertfeger, S.

Shur, V. Y.

Sibbett, W.

E. U. Rafailov, W. Sibbett, A. Mooradian, J. G. McInerney, H. Karlsson, S. Wang, and F. Laurell, "Efficient frequency doubling of a vertical-extended-cavity surface-emitting laser diode by use of a periodically poled KTP crystal," Opt. Lett. 28, 2091-2093 (2003).
[CrossRef] [PubMed]

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

Skliar, A.

Skoczowsky, D.

Smith, P. G. R.

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

Sokolovskii, G. S.

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

Spinelli, L.

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

Steinbrecher, M.

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

Sugita, T.

Sumpf, B.

Tárnok, A.

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

Tränkle, G.

Tremont, M. A.

Vo-Dinh, T.

T. Vo-Dinh, B. Cullum, and P. Kasili, "Development of a multispectral imaging system for medical applications," J. Phys. D 36, 1663-1668 (2003).
[CrossRef]

Wallenstein, R.

Wang, S.

Wei, Y.

Woll, D.

Yamamoto, K.

Ye, Z.

Zeitschel, A.

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

Appl. Phys. B (1)

E. Samsøe, P. M. Petersen, S. Andersson-Engels, and P. E. Andersen, "Second-harmonic generation of 405-nm light using periodically poled KTiOPO4 pumped by external-cavity laser diode with double grating feedback," Appl. Phys. B 80, 861-864 (2005).
[CrossRef]

Appl. Phys. Lett. (1)

D. J. L. Birkin, E. U. Rafailov, G. S. Sokolovskii, W. Sibbett, G. W. Ross, P. G. R. Smith, and D. C. Hanna, "3.6 mW blue light by direct frequency doubling of a diode laser using an aperiodically poled lithium niobate crystal," Appl. Phys. Lett. 78, 3172-3174 (2001).
[CrossRef]

J. Appl. Phys. (1)

G. D. Boyd and D. A. Kleinman, "Parametric interaction of focussed Gaussian light beams," J. Appl. Phys. 39, 3597-3637 (1968).
[CrossRef]

J. Phys. D (1)

T. Vo-Dinh, B. Cullum, and P. Kasili, "Development of a multispectral imaging system for medical applications," J. Phys. D 36, 1663-1668 (2003).
[CrossRef]

Opt. Express (1)

Opt. Lett. (9)

M. Maiwald, S. Schwertfeger, R. Güther, B. Sumpf, K. Paschke, C. Dzionk, G. Erbert, and G. Tränkle, "600 mW optical output power at 488 nm by use of a high-power hybrid laser diode system and a periodically poled MgO:LiNbO3 bulk crystal," Opt. Lett. 31, 802-804 (2006).
[CrossRef] [PubMed]

V. Raab and R. Menzel, "External resonator design for high-power laser diodes that yields 400 mW of TEMlowbar00 power," Opt. Lett. 27, 167-169 (2002).
[CrossRef]

V. Raab, D. Skoczowsky, and R. Menzel, "Tuning high-power laser diodes with as much as 0.38 W of power and M 2 = 1.2 over a range of 32 nm with 3-GHz bandwidth," Opt. Lett. 27, 1995-1997 (2002).
[CrossRef]

R. G. Batchko, M. M. Fejer, R. L. Byer, D. Woll, R. Wallenstein, V. Y. Shur, and L. Erman, "Continuous-wave quasi-phase-matched generation of 60 mW at 465 nm by single-pass frequency doubling of a laser diode in backswitch-poled lithium niobate," Opt. Lett. 24, 1293-1295 (1999).
[CrossRef]

T. Sugita, K. Mizuuchi, Y. Kitaoka, and K. Yamamoto, "31%-efficient blue second-harmonic generation in a periodically poled MgOLiNbO3 waveguide by frequency doubling of an AlGaAs laser diode," Opt. Lett. 24, 1590-1592 (1999).
[CrossRef]

A. Englander, R. Lavi, M. Katz, M. Oron, D. Eger, E. Lebiush, G. Rosenman, and A. Skliar, "Highly efficient doubling of a high-repetition-rate diode-pumped laser with bulk periodically poled KTP," Opt. Lett. 22, 1598-1599 (1997).
[CrossRef]

D. Woll, J. Schumacher, A. Robertson, M. A. Tremont, R. Wallenstein, M. Katz, D. Eger, and A. Englander, "250 mW of coherent blue 460 nm light generated by single-pass frequency doubling of the output of a mode-locked high-power diode laser in periodically poled KTP," Opt. Lett. 27, 1055-1057 (2002).
[CrossRef]

E. U. Rafailov, W. Sibbett, A. Mooradian, J. G. McInerney, H. Karlsson, S. Wang, and F. Laurell, "Efficient frequency doubling of a vertical-extended-cavity surface-emitting laser diode by use of a periodically poled KTP crystal," Opt. Lett. 28, 2091-2093 (2003).
[CrossRef] [PubMed]

Z. Ye, Q. Lou, J. Dong, Y. Wei, and L. Lin, "Compact continuous-wave blue lasers by direct frequency doubling of laser diodes with periodically poled lithium niobate waveguide crystals," Opt. Lett. 30, 73-74 (2005).
[CrossRef] [PubMed]

Proc. SPIE (2)

J. L. Chilla, S. D. Butterworth, A. Zeitschel, J. P. Charles, A. L. Caprara, M. K. Reed, and L. Spinelli, "High power optically pumped semiconductor lasers," in Solid State Lasers XIII: Technology and Devices, R. Scheps and H. J. Hoffman, eds., Proc. SPIE 5332, 143-150 (2004).
[CrossRef]

D. Lenz, A. O. Gerstner, W. Laffers, M. Steinbrecher, F. Bootz, and A. Tárnok, "Six and more color immunophenotyping on the slide by laser scanning cytometry (LSC)," in Manipulation and Analysis of Biomolecules, Cells, and Tissues,Proc. SPIE 4962, 364-374 (2003).
[CrossRef]

Cited By

OSA participates in CrossRef's Cited-By Linking service. Citing articles from OSA journals and other participating publishers are listed here.

Alert me when this article is cited.


Figures (6)

Fig. 1
Fig. 1

Schematic of the V-shaped laser setup. It consists of an anti-reflection-coated broad area laser diode, FAC f = 0.9 mm , L1 cylindrical lens f = 40 mm (slow axis), L2 cylindrical lens f = 300 mm (slow axis), L3 cylindrical lens f = 150 mm (slow axis), L4 cylindrical lens f = 60 mm (fast axis).

Fig. 2
Fig. 2

Line width of the infrared pump light at a pumping current of 3.0 A and an optical output power of 800 mW.

Fig. 3
Fig. 3

Power of the blue light ( P SHG ) as a function of the power of the infrared light ( P IR ) for four different crystal temperatures (with quadratic fit).

Fig. 4
Fig. 4

Spectra of (a) generated blue light and (b) infrared pump light at an injection current of 2.5 A and an overall output power of 20 mW.

Fig. 5
Fig. 5

Beam caustic for the slow axis direction of the blue light at 2.5 A injection current of the diode laser and an optical output power of 20 mW at 489 nm . The hyperbolic fit results in a beam quality of M 2 = 1.15 .

Fig. 6
Fig. 6

Emission wavelength of the blue light as a function of the PPLN temperature.

Equations (1)

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

P SHG = η × P IR 2 .

Metrics