Abstract

Efficient doubling of femtosecond pulses in periodically and aperiodically poled KTP crystals is demonstrated by employing the quasi-phasematched frequency conversion technique. Conversion efficiencies as high as 60% were achieved using either aperiodically or periodically poled KTP nonlinear crystals in an extracavity, single-pass configuration using a diode-pumped femtosecond Yb:KYW laser as the pump source. The temporal characteristics of the frequency-doubled pulses as a function of focusing conditions in a “thick” nonlinear crystal regime have been investigated experimentally and pulses as short as 177 fs have been generated at around 520 nm under strong focusing conditions using a KTP crystal with aperiodic poling.

© 2007 Optical Society of America

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef] [PubMed]
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2005 (2)

G. R. Fayaz, M. Ghotbi, and M. Ebrahim-Zadeh, "Efficient second-harmonic generation of tunable femtosecond pulses into the blue in periodically poled KTP," Appl. Phys. Lett. 86, 061110 (2005).
[CrossRef]

A. A. Lagatsky, E. U. Rafailov, A. R. Sarmani, C. T. A. Brown, W. Sibbett, L. Ming, and P. G. R. Smith, "Efficient femtosecond green light source with a diode-pumped mode-locked Yb:KYW laser," Opt. Lett. 30, 1144-1146 (2005).
[CrossRef] [PubMed]

2004 (2)

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

S. M. Saltiel, K. Koynov, B. Agate, and W. Sibbett, "Second-harmonic generation with focused beams under conditions of large group-velocity mismatch," J. Opt. Soc. Am. B 21, 591-598 (2004).
[CrossRef]

1998 (2)

1997 (1)

H. Karlsson and F. Laurell, "Electric field poling of flux grown KTiOPO4," Appl. Phys. Lett. 71, 3474-3476 (1997).
[CrossRef]

1993 (2)

M. Yamada, N. Nada, M. Saitoh, and K. Watanabe, "First-order quasi-phase matched LiNbO3 waveguide periodically poled by applying an external field for efficient blue second-harmonic generation," Appl. Phys. Lett. 62, 435-436 (1993).
[CrossRef]

W. Wiechmann, S. Kubota, T. Fukui, and H. Masuda, "Refractive-index temperature derivatives of potassium titanyl phosphate," Opt. Lett. 18, 1208-1210 (1993).
[CrossRef] [PubMed]

1989 (1)

J. Webjörn, F. Laurell, and G. Arvidsson, "Fabrication of periodically domain-inverted channel waveguides in lithium niobate for second harmonic generation," J Lightwave Technol. 7, 1597-1600 (1989).
[CrossRef]

1987 (1)

1986 (1)

Agate, B.

S. M. Saltiel, K. Koynov, B. Agate, and W. Sibbett, "Second-harmonic generation with focused beams under conditions of large group-velocity mismatch," J. Opt. Soc. Am. B 21, 591-598 (2004).
[CrossRef]

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Arvidsson, G.

J. Webjörn, F. Laurell, and G. Arvidsson, "Fabrication of periodically domain-inverted channel waveguides in lithium niobate for second harmonic generation," J Lightwave Technol. 7, 1597-1600 (1989).
[CrossRef]

Battle, P.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Bayer, T.

Brown, C. T. A.

Byer, R. L.

Ebrahim-Zadeh, M.

G. R. Fayaz, M. Ghotbi, and M. Ebrahim-Zadeh, "Efficient second-harmonic generation of tunable femtosecond pulses into the blue in periodically poled KTP," Appl. Phys. Lett. 86, 061110 (2005).
[CrossRef]

Eckardt, R. C.

Fan, T. Y.

Fan, Y. X.

Fayaz, G. R.

G. R. Fayaz, M. Ghotbi, and M. Ebrahim-Zadeh, "Efficient second-harmonic generation of tunable femtosecond pulses into the blue in periodically poled KTP," Appl. Phys. Lett. 86, 061110 (2005).
[CrossRef]

Feigelson, R. S.

Fry, T.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Fukui, T.

Ghotbi, M.

G. R. Fayaz, M. Ghotbi, and M. Ebrahim-Zadeh, "Efficient second-harmonic generation of tunable femtosecond pulses into the blue in periodically poled KTP," Appl. Phys. Lett. 86, 061110 (2005).
[CrossRef]

Hu, B. Q.

Huang, C. E.

Kan’an, A. M.

Karlsson, H.

Koinov, K.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Koynov, K.

Kubota, S.

Lagatsky, A. A.

Laurell, F.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

S. Wang, V. Pasiskevicius, F. Laurell, and H. Karlsson, "Ultraviolet generation by first-order frequency doubling in periodically poled KTiOPO4," Opt. Lett. 23, 1883-1885 (1998).
[CrossRef]

H. Karlsson and F. Laurell, "Electric field poling of flux grown KTiOPO4," Appl. Phys. Lett. 71, 3474-3476 (1997).
[CrossRef]

J. Webjörn, F. Laurell, and G. Arvidsson, "Fabrication of periodically domain-inverted channel waveguides in lithium niobate for second harmonic generation," J Lightwave Technol. 7, 1597-1600 (1989).
[CrossRef]

Leaird, D. E.

Masuda, H.

Ming, L.

Nada, N.

M. Yamada, N. Nada, M. Saitoh, and K. Watanabe, "First-order quasi-phase matched LiNbO3 waveguide periodically poled by applying an external field for efficient blue second-harmonic generation," Appl. Phys. Lett. 62, 435-436 (1993).
[CrossRef]

Noonan, E.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Pasiskevicius, V.

Rafailov, E. U.

A. A. Lagatsky, E. U. Rafailov, A. R. Sarmani, C. T. A. Brown, W. Sibbett, L. Ming, and P. G. R. Smith, "Efficient femtosecond green light source with a diode-pumped mode-locked Yb:KYW laser," Opt. Lett. 30, 1144-1146 (2005).
[CrossRef] [PubMed]

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Roberts, T.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Saitoh, M.

M. Yamada, N. Nada, M. Saitoh, and K. Watanabe, "First-order quasi-phase matched LiNbO3 waveguide periodically poled by applying an external field for efficient blue second-harmonic generation," Appl. Phys. Lett. 62, 435-436 (1993).
[CrossRef]

Saltiel, S. M.

S. M. Saltiel, K. Koynov, B. Agate, and W. Sibbett, "Second-harmonic generation with focused beams under conditions of large group-velocity mismatch," J. Opt. Soc. Am. B 21, 591-598 (2004).
[CrossRef]

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Sarmani, A. R.

Sibbett, W.

Smith, P. G. R.

Tihonen, M.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

Wang, S.

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

S. Wang, V. Pasiskevicius, F. Laurell, and H. Karlsson, "Ultraviolet generation by first-order frequency doubling in periodically poled KTiOPO4," Opt. Lett. 23, 1883-1885 (1998).
[CrossRef]

Watanabe, K.

M. Yamada, N. Nada, M. Saitoh, and K. Watanabe, "First-order quasi-phase matched LiNbO3 waveguide periodically poled by applying an external field for efficient blue second-harmonic generation," Appl. Phys. Lett. 62, 435-436 (1993).
[CrossRef]

Webjörn, J.

J. Webjörn, F. Laurell, and G. Arvidsson, "Fabrication of periodically domain-inverted channel waveguides in lithium niobate for second harmonic generation," J Lightwave Technol. 7, 1597-1600 (1989).
[CrossRef]

Weiner, A. M.

Wiechmann, W.

Yamada, M.

M. Yamada, N. Nada, M. Saitoh, and K. Watanabe, "First-order quasi-phase matched LiNbO3 waveguide periodically poled by applying an external field for efficient blue second-harmonic generation," Appl. Phys. Lett. 62, 435-436 (1993).
[CrossRef]

Appl. Opt. (1)

Appl. Phys. Lett. (3)

M. Yamada, N. Nada, M. Saitoh, and K. Watanabe, "First-order quasi-phase matched LiNbO3 waveguide periodically poled by applying an external field for efficient blue second-harmonic generation," Appl. Phys. Lett. 62, 435-436 (1993).
[CrossRef]

H. Karlsson and F. Laurell, "Electric field poling of flux grown KTiOPO4," Appl. Phys. Lett. 71, 3474-3476 (1997).
[CrossRef]

G. R. Fayaz, M. Ghotbi, and M. Ebrahim-Zadeh, "Efficient second-harmonic generation of tunable femtosecond pulses into the blue in periodically poled KTP," Appl. Phys. Lett. 86, 061110 (2005).
[CrossRef]

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

B. Agate, E. U. Rafailov, W. Sibbett, S. M. Saltiel, K. Koinov, M. Tihonen, S. Wang, F. Laurell, P. Battle, T. Fry, T. Roberts, and E. Noonan, "Portable ultrafast blue light sources designed with frequency doubling in KTP and KNbO3," IEEE J. Sel. Top. Quantum Electron. 10, 1268 -1276 (2004).
[CrossRef]

J Lightwave Technol. (1)

J. Webjörn, F. Laurell, and G. Arvidsson, "Fabrication of periodically domain-inverted channel waveguides in lithium niobate for second harmonic generation," J Lightwave Technol. 7, 1597-1600 (1989).
[CrossRef]

J. Opt. Soc. Am. B (2)

Opt. Lett. (4)

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Figures (4)

Fig. 1.
Fig. 1.

Dependence of the SHG efficiency on temperature of the pp-KTP crystal (a) and app-KTP crystal (b) at different L/b parameters.

Fig. 2.
Fig. 2.

(a). SH conversion efficiency versus L/b focusing ratio in 4.8mm-long pp-KTP and 2.7mm-long app-KTP; (b) Measured SH average output power and SH conversion efficiency versus incident fundamental power.

Fig. 3.
Fig. 3.

(a). Ratio of the SH pulse duration to the fundamental pulse duration and (b) SH peak power as a function of focusing parameter L/b.

Fig. 4.
Fig. 4.

Measured SH spectra at different L/b ratios for pp-KTP (a) and app-KTP (b).

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