Nonlinear Cascaded Femtosecond Third Harmonic Generation by Multi-grating Periodically Poled MgO-doped Lithium Niobate

Shuanggen Zhang, Wenchao You, Zhangchao Huang

School of Electronic Information Engineering, Tianjin University of Technology, Tianjin Key Laboratory of Film Electronic and Communication Device, Engineering Research Center of Communication Devices Ministry of Education, Tianjin University of Technology, Tianjin, China.
School of Physics, Nankai University, Tianjin, China.

DOI: 10.4236/opj.2013.32B012                

Abstract

Nonlinear cascaded femtosecond third harmonic generation was experimentally investigated pumped by 100 fs pulses at optical communication band 1550 nm using a multi-grating 5 mol. % MgO-doped periodically poled lithium niobate crystal. The optimized efficiency of 10.8% was achieved with the simultaneous phase-matching of the second harmonic and sum frequency process. And the third harmonic spectrum reached as broad as 8.7 nm because of the choosing of a small group velocity mismatching between the fundamental and second harmonic pulses. Nonlinear cascaded method will provide a reference for the efficient frequency conversion in the high intensity range.

Keywords

Femtosecond; Third Harmonic Generation; Second Harmonic Generation; Cascaded Nonlinear Process

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	K. Kintaka, M. Fujimura, T. Suhara and H. Nishihara, “Third Harmonic Generation of Nd: YAG Laser Light in Periodically Poled LiNbO3”, Electronic Letters, Vol. 33, No. 17, 1997, pp. 1459-1461. doi:10.1049/el:19970990
[2]	S. N. Zhu, Y. Y. Zhu and N. B. Ming, “Quasi-Phase- Matched Third Harmonic Generation in a Quasi- Periodic Optical Superlattice,” Science, Vol. 278, No. 5339, 1997, pp. 843-846. doi:10.1126/science.278.5339.843
[3]	C. Zhang, H. Wei, Y. Y. Zhu, H. T. Wang, S. N. Zhu and N. B. Ming, “Third-Harmonic Generation in A General Two-Component Quasi-Periodic Optical Superlattice,” Optics Letters, Vol. 26, No. 12, 2001, pp. 899-901. doi:10.1364/OL.26.000899
[4]	N. G. R. Broderick, R. T. Bratfalean, T. M. Monro, D. J. Richardson and C. M. de Sterke, “Temperature and Wavelength Tuning of Second-, Third-, and Fourth-Harmonic Generation in A Two-Dimensional Hexagonally Poled Nonlinear Crystal,” Journal of the Optical Society of America B, Vol. 19, No. 9, 2002, pp. 2263-2272. doi:10.1364/JOSAB.19.002263
[5]	A. H. Norton and C. M. de Sterke, “Optimal Poling of Nonlinear Photonic Crystals for Frequency Conversion,” Optics Letters, Vol. 28, No. 3, 2003, pp. 188-190.
[6]	A. H. Norton and C. M. de Sterke, “Two-Dimensional Poling Patterns for 3rd and 4th Harmonic Generation,” Optics Express, Vol. 11, No. 9, 2003, pp. 1008-1014. doi:10.1364/OE.11.001008
[7]	Y. Sheng, S. M. Saltiel and K. Koynov, “Cascaded Third-Harmonic Generation in A Single Short-Range -Ordered Nonlinear Photonic Crystal,” Optics Letters, Vol. 34, No. 5, 2009, pp. 656-658. doi:10.1364/OL.34.000656
[8]	N. Fujioka, S. Ashihara, H. Ono, T. Shimura and K. Kuroda, “Cascaded Third-Harmonic Generation of Ultrashort Optical Pulses in Two-Dimensional Quasi-Phase- Matching Gratings,” Journal of the Optical Society of America B, Vol. 24, No.9, 2007, pp. 2394-2405. doi:10.1364/JOSAB.24.002394
[9]	D. E. Zelmon, D. L. Small and D. Jundt, “Infrared Corrected Sellmeier Coefficients for Congruently Grown Lithium Niobate and 5 mol.% Magnesium Oxide –Doped Lithium Niobate,” Journal of the Optical Society of America B, Vol. 14, No. 12, 1997, pp. 3319-3322. doi:10.1364/JOSAB.14.003319
[10]	Z. C. Huang, C. H. Tu, S. G. Zhang, Y. N. Li, F. Y. Lu, Y. X. Fan and E. B. Li, “Femtosecond Second-Harmonic Generation in Periodically Poled Lithium Niobate Waveguides Written by Femtosecond Laser Pulses,” Optics Letters, Vol. 35, No. 6, 2010, pp. 877-879. doi:10.1364/OL.35.000877
[11]	DeSalvo, A. A. Said, D. J. Hagan, E. W. Van Stryland, and M. Sheik-Bahae, “Infrared to Ultraviolet Measurements of Two-Photon Absorption and N2 in Wide Bandgap Solids,” IEEE Journal of Quantum Electronics, Vol.32, No. 8, 1996, pp. 1324-1333. doi:10.1109/3.511545
[12]	N. E. Yu, J. H. Ro, M. Cha, S. Kurimura and T. Taira, “Broadband Quasi-Phase-Matched Second-Harmonic Generation in MgO-Doped Periodically Poled LiNbO3 at the Communications Band,” Optics Letters, Vol. 27, No. 12, 2002, pp. 1046-1048. doi:10.1364/OL.27.001046