Femto-second laser writing was used to fabricate waveguides in a z-cut KTP sample with losses below 0.8 dB/cm. They were used for efficient, broad bandwidth, Type II birefringent second harmonic generation to the green. The temperature and wavelength bandwidth were, 28⁰C∙cm and 0.85 nm∙cm, respectively.

© 2012 OSA

1. J. D. Bierlein and H. Vanherzeele, “Potassium titanyl phosphate: properties and new applications,” J. Opt. Soc. Am. B6(4), 622–633 (1989). [CrossRef]
2. M. G. Roelofs, P. A. Morris, and J. D. Bierlein, “Ion exchange of Rb, Ba, and Sr in KTiOPO4,” J. Appl. Phys.70(2), 720–728 (1991). [CrossRef]
3. F. Laurell, J. B. Brown, and J. D. Bierlein, “Sum‐frequency generation in segmented KTP waveguides,” Appl. Phys. Lett.60(9), 1064–1066 (1992). [CrossRef]
4. F. Laurell, “Periodically poled materials for miniature light sources,” Opt. Mater.11(2-3), 235–244 (1999). [CrossRef]
5. P. Bindner, A. Boudrioua, J. C. Loulergue, and P. Moretti, “Formation of planar optical waveguides in potassium titanyl phosphate by double implantation of protons,” Appl. Phys. Lett.79(16), 2558–2561 (2001). [CrossRef]
6. S. Campbell, R. R. Thomson, D. P. Hand, A. K. Kar, D. T. Reid, C. Canalias, V. Pasiskevicius, and F. Laurell, “Frequency-doubling in femtosecond laser inscribed periodically-poled potassium titanyl phosphate waveguides,” Opt. Express15(25), 17146–17150 (2007). [CrossRef] [PubMed]
7. C. Tu, Z. Huang, K. Lou, H. Liu, Y. Wang, Y. Li, F. Lu, and H. T. Wang, “Efficient green-light generation by frequency doubling of a picosecond all-fiber ytterbium-doped fiber amplifier in PPKTP waveguide inscribed by femtosecond laser direct writing,” Opt. Express18(24), 25183–25191 (2010). [CrossRef] [PubMed]
8. B. C. Stuart, M. D. Feit, S. Herman, A. M. Rubenchik, B. W. Shore, and M. D. Perry, “Nanosecond-to-femtosecond laser-induced breakdown in dielectrics,” Phys. Rev. B Condens. Matter53(4), 1749–1761 (1996). [CrossRef] [PubMed]
9. D. Homoelle, S. Wielandy, A. L. Gaeta, N. F. Borrelli, and C. Smith, “Infrared photosensitivity in silica glasses exposed to femtosecond laser pulses,” Opt. Lett.24(18), 1311–1313 (1999). [CrossRef] [PubMed]
10. S. Nolte, M. Will, J. Burghoff, and A. Tünnermann, “Femtosecond waveguide writing: a new avenue to three-dimensional integrated optics,” Appl. Phys., A Mater. Sci. Process.77(1), 109–111 (2003). [CrossRef]
11. A. M. Kowalevicz, V. Sharma, E. P. Ippen, J. G. Fujimoto, and K. Minoshima, “Three-dimensional photonic devices fabricated in glass by use of a femtosecond laser oscillator,” Opt. Lett.30(9), 1060–1062 (2005). [CrossRef] [PubMed]
12. K. Suzuki, V. Sharma, J. G. Fujimoto, E. P. Ippen, and Y. Nasu, “Characterization of symmetric [3 x 3] directional couplers fabricated by direct writing with a femtosecond laser oscillator,” Opt. Express14(6), 2335–2343 (2006). [CrossRef] [PubMed]
13. S. M. Eaton, H. Zhang, P. R. Herman, F. Yoshino, L. Shah, J. Bovatsek, and A. Y. Arai, “Heat accumulation effects in femtosecond laser-written waveguides with variable repetition rate,” Opt. Express13(12), 4708–4716 (2005). [CrossRef] [PubMed]
14. M. Ams, P. Dekker, G. D. Marshall, and M. J. Withford, “Monolithic 100 mW Yb waveguide laser fabricated using the femtosecond-laser direct-write technique,” Opt. Lett.34(3), 247–249 (2009). [CrossRef] [PubMed]
15. T. Calmano, J. Siebenmorgen, O. Hellmig, K. Petermann, and G. Huber, “Nd:YAG waveguide laser with 1.3 W output power, fabricated by direct femtosecond laser writing,” Appl. Phys. B100(1), 131–135 (2010). [CrossRef]
16. T. Calmano, J. Siebenmorgen, A. Paschke, C. Fiebig, K. Paschke, G. Erbert, K. Petermann, and G. Huber, “Diode pumped high power operation of a femtosecond laser inscribed Yb:YAG waveguide laser,” Opt. Mater. Express1(3), 428 (2011). [CrossRef]
17. J. Siebenmorgen, T. Calmano, K. Petermann, and G. Huber, “Highly efficient Yb:YAG channel waveguide laser written with a femtosecond-laser,” Opt. Express18(15), 16035–16041 (2010). [CrossRef] [PubMed]
18. J. Burghoff, C. Grebing, S. Nolte, and A. Tünnermann, “Efficient frequency doubling in femtosecond laser-written waveguides in lithium niobate,” Appl. Phys. Lett.89(8), 081108 (2006). [CrossRef]
19. R. Osellame, M. Lobino, N. Chiodo, M. Marangoni, G. Cerullo, R. Ramponi, H. T. Bookey, R. R. Thomson, N. D. Psaila, and A. K. Kar, “Femtosecond laser writing of waveguides in periodically poled lithium niobate preserving the nonlinear coefficient,” Appl. Phys. Lett.90(24), 241107 (2007). [CrossRef]
20. N. Dong, J. Martínez de Mendivil, E. Cantelar, G. Lifante, J. Vázquez de Aldana, G. A. Torchia, F. Chen, and D. Jaque, “Self-frequency-doubling of ultrafast laser inscribed neodymium doped yttrium aluminum borate waveguides,” Appl. Phys. Lett.98(18), 181103 (2011). [CrossRef]
21. T. Y. Fan, C. E. Huang, B. Q. Hu, R. C. Eckardt, Y. X. Fan, R. L. Byer, and R. S. Feigelson, “Second harmonic generation and accurate index of refraction measurements in flux-grown KTiOPO4.,” Appl. Opt.26(12), 2390–2394 (1987). [CrossRef] [PubMed]
22. P. Jelger, M. Engholm, L. Norin, and F. Laurell, “Degradation-resistant lasing at 980 nm in a Yb/Ce/Al-doped silica fiber,” J. Opt. Soc. Am. B27(2), 338–342 (2010). [CrossRef]
23. Z. Y. Ou, S. F. Pereira, E. S. Polzik, and H. J. Kimble, “85% efficiency for cw frequency doubling from 1.08 to 0.54, µm,” Opt. Lett.17(9), 640–642 (1992). [CrossRef] [PubMed]
24. B. Boulanger, J. P. Fève, G. Marnier, B. Ménaert, X. Cabirol, P. Villeval, and C. Bonnin, “Relative sign and absolute magnitude of d2 nonlinear coefficients of KTP from second-harmonic-generation measurements,” J. Opt. Soc. Am. B11(5), 750–757 (1994). [CrossRef]
25. W. P. Risk, R. N. Payne, W. Lenth, C. Harder, and H. Meier, “Noncritically phasematched frequency doubling using 994 nm dye and diode laser radiation in KTiOP04,” Appl. Phys. Lett.55(12), 1179–1181 (1989). [CrossRef]

Appl. Opt.

• T. Y. Fan, C. E. Huang, B. Q. Hu, R. C. Eckardt, Y. X. Fan, R. L. Byer, and R. S. Feigelson, “Second harmonic generation and accurate index of refraction measurements in flux-grown KTiOPO4.,” Appl. Opt.26(12), 2390–2394 (1987). [CrossRef] [PubMed]

Appl. Phys. B

• T. Calmano, J. Siebenmorgen, O. Hellmig, K. Petermann, and G. Huber, “Nd:YAG waveguide laser with 1.3 W output power, fabricated by direct femtosecond laser writing,” Appl. Phys. B100(1), 131–135 (2010). [CrossRef]

Appl. Phys. Lett.

• F. Laurell, J. B. Brown, and J. D. Bierlein, “Sum‐frequency generation in segmented KTP waveguides,” Appl. Phys. Lett.60(9), 1064–1066 (1992). [CrossRef]
• P. Bindner, A. Boudrioua, J. C. Loulergue, and P. Moretti, “Formation of planar optical waveguides in potassium titanyl phosphate by double implantation of protons,” Appl. Phys. Lett.79(16), 2558–2561 (2001). [CrossRef]
• J. Burghoff, C. Grebing, S. Nolte, and A. Tünnermann, “Efficient frequency doubling in femtosecond laser-written waveguides in lithium niobate,” Appl. Phys. Lett.89(8), 081108 (2006). [CrossRef]
• R. Osellame, M. Lobino, N. Chiodo, M. Marangoni, G. Cerullo, R. Ramponi, H. T. Bookey, R. R. Thomson, N. D. Psaila, and A. K. Kar, “Femtosecond laser writing of waveguides in periodically poled lithium niobate preserving the nonlinear coefficient,” Appl. Phys. Lett.90(24), 241107 (2007). [CrossRef]
• N. Dong, J. Martínez de Mendivil, E. Cantelar, G. Lifante, J. Vázquez de Aldana, G. A. Torchia, F. Chen, and D. Jaque, “Self-frequency-doubling of ultrafast laser inscribed neodymium doped yttrium aluminum borate waveguides,” Appl. Phys. Lett.98(18), 181103 (2011). [CrossRef]
• W. P. Risk, R. N. Payne, W. Lenth, C. Harder, and H. Meier, “Noncritically phasematched frequency doubling using 994 nm dye and diode laser radiation in KTiOP04,” Appl. Phys. Lett.55(12), 1179–1181 (1989). [CrossRef]

Appl. Phys., A Mater. Sci. Process.

• S. Nolte, M. Will, J. Burghoff, and A. Tünnermann, “Femtosecond waveguide writing: a new avenue to three-dimensional integrated optics,” Appl. Phys., A Mater. Sci. Process.77(1), 109–111 (2003). [CrossRef]

J. Appl. Phys.

• M. G. Roelofs, P. A. Morris, and J. D. Bierlein, “Ion exchange of Rb, Ba, and Sr in KTiOPO4,” J. Appl. Phys.70(2), 720–728 (1991). [CrossRef]

J. Opt. Soc. Am. B

• J. D. Bierlein and H. Vanherzeele, “Potassium titanyl phosphate: properties and new applications,” J. Opt. Soc. Am. B6(4), 622–633 (1989). [CrossRef]
• B. Boulanger, J. P. Fève, G. Marnier, B. Ménaert, X. Cabirol, P. Villeval, and C. Bonnin, “Relative sign and absolute magnitude of d2 nonlinear coefficients of KTP from second-harmonic-generation measurements,” J. Opt. Soc. Am. B11(5), 750–757 (1994). [CrossRef]
• P. Jelger, M. Engholm, L. Norin, and F. Laurell, “Degradation-resistant lasing at 980 nm in a Yb/Ce/Al-doped silica fiber,” J. Opt. Soc. Am. B27(2), 338–342 (2010). [CrossRef]

Opt. Express

• S. Campbell, R. R. Thomson, D. P. Hand, A. K. Kar, D. T. Reid, C. Canalias, V. Pasiskevicius, and F. Laurell, “Frequency-doubling in femtosecond laser inscribed periodically-poled potassium titanyl phosphate waveguides,” Opt. Express15(25), 17146–17150 (2007). [CrossRef] [PubMed]
• C. Tu, Z. Huang, K. Lou, H. Liu, Y. Wang, Y. Li, F. Lu, and H. T. Wang, “Efficient green-light generation by frequency doubling of a picosecond all-fiber ytterbium-doped fiber amplifier in PPKTP waveguide inscribed by femtosecond laser direct writing,” Opt. Express18(24), 25183–25191 (2010). [CrossRef] [PubMed]
• K. Suzuki, V. Sharma, J. G. Fujimoto, E. P. Ippen, and Y. Nasu, “Characterization of symmetric [3 x 3] directional couplers fabricated by direct writing with a femtosecond laser oscillator,” Opt. Express14(6), 2335–2343 (2006). [CrossRef] [PubMed]
• S. M. Eaton, H. Zhang, P. R. Herman, F. Yoshino, L. Shah, J. Bovatsek, and A. Y. Arai, “Heat accumulation effects in femtosecond laser-written waveguides with variable repetition rate,” Opt. Express13(12), 4708–4716 (2005). [CrossRef] [PubMed]
• J. Siebenmorgen, T. Calmano, K. Petermann, and G. Huber, “Highly efficient Yb:YAG channel waveguide laser written with a femtosecond-laser,” Opt. Express18(15), 16035–16041 (2010). [CrossRef] [PubMed]

Opt. Lett.

• D. Homoelle, S. Wielandy, A. L. Gaeta, N. F. Borrelli, and C. Smith, “Infrared photosensitivity in silica glasses exposed to femtosecond laser pulses,” Opt. Lett.24(18), 1311–1313 (1999). [CrossRef] [PubMed]
• M. Ams, P. Dekker, G. D. Marshall, and M. J. Withford, “Monolithic 100 mW Yb waveguide laser fabricated using the femtosecond-laser direct-write technique,” Opt. Lett.34(3), 247–249 (2009). [CrossRef] [PubMed]
• A. M. Kowalevicz, V. Sharma, E. P. Ippen, J. G. Fujimoto, and K. Minoshima, “Three-dimensional photonic devices fabricated in glass by use of a femtosecond laser oscillator,” Opt. Lett.30(9), 1060–1062 (2005). [CrossRef] [PubMed]
• Z. Y. Ou, S. F. Pereira, E. S. Polzik, and H. J. Kimble, “85% efficiency for cw frequency doubling from 1.08 to 0.54, µm,” Opt. Lett.17(9), 640–642 (1992). [CrossRef] [PubMed]

Opt. Mater.

• F. Laurell, “Periodically poled materials for miniature light sources,” Opt. Mater.11(2-3), 235–244 (1999). [CrossRef]

Opt. Mater. Express

• T. Calmano, J. Siebenmorgen, A. Paschke, C. Fiebig, K. Paschke, G. Erbert, K. Petermann, and G. Huber, “Diode pumped high power operation of a femtosecond laser inscribed Yb:YAG waveguide laser,” Opt. Mater. Express1(3), 428 (2011). [CrossRef]

Phys. Rev. B Condens. Matter

• B. C. Stuart, M. D. Feit, S. Herman, A. M. Rubenchik, B. W. Shore, and M. D. Perry, “Nanosecond-to-femtosecond laser-induced breakdown in dielectrics,” Phys. Rev. B Condens. Matter53(4), 1749–1761 (1996). [CrossRef] [PubMed]

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