Abstract

Numerical solutions to the set of coupled nonlinear wave equations for a novel mirrorless counterpropagating quasi-phase-matched (c-QPM) device are presented. Mirrorless c-QPM is investigated in stand-alone and in two interferometric configurations for all-optical switching (AOS) applications. The switching intensity is found to be very low using existing materials (e.g., 500 mW in a 1-cm-long KTP waveguide with a 10 {\mu}m2 effective area). Additionally, parameter sets are found that minimize pulse breakup and improve the possibility of a practical implementation. Although second harmonic generation (SHG) is also investigated in the stand-alone device, the conversion efficiency is shown to be eight times less efficient than the mirrored configuration.

[IEEE ]

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  1. D. J. Hagan, Z. Wang, G. Stegeman, E. W. Van Stryland, M. Sheik-Bahae, and G. Assanto, "Phase-controlled transistor action by cascading of second-order nonlinearities in KTP," Opt. Lett., vol. 19, pp. 1305-1307, 1994.
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  6. J. U. Kang, Y. J. Ding, W. K. Burns, and J. S. Melinger, "Backward second-harmonic generation in periodically poled bulk LiNbO_3," Opt. Lett., vol. 22, pp. 862-864, 1997.
  7. G. D. Landry and T. A. Maldonado, "Efficient nonlinear phase shifts due to cascaded second order processes in a counter-propagating quasiphase-matched configuration," Opt. Lett., vol. 22, pp. 1400-1402, 1997.
  8. Y. J. Ding and J. B. Khurgin, "Second-harmonic generation based on quasiphase matching: A novel configuration," Opt. Lett., vol. 21, pp. 1445-1447, 1996.

Opt. Lett. (8)

D. J. Hagan, Z. Wang, G. Stegeman, E. W. Van Stryland, M. Sheik-Bahae, and G. Assanto, "Phase-controlled transistor action by cascading of second-order nonlinearities in KTP," Opt. Lett., vol. 19, pp. 1305-1307, 1994.

G. Assanto, "Transistor action through nonlinear cascading in type II interactions," Opt. Lett., vol. 20, pp. 1595-1597, 1995.

R. Schiek, Y. Baek, G. Krijnen, G. I. Stegeman, I. Baumann, and W. Sohler, "All-optical switching in lithium niobate directional couplers with cascaded nonlinearity," Opt. Lett., vol. 21, pp. 940-942, 1996.

M. Asobe, I. Yokohama, H. Itoh, and T. Kaino, "All-optical switching by use of cascading of phase-matched sum-frequency-generation and difference-frequency-generation processes in periodically poled LiNbO_3," Opt. Lett., vol. 22, pp. 274-276, 1997.

M. A. Krumbugel, J. N. Sweetser, D. N. Fittinghoff, K. W. DeLong, and R. Trebino, "Ultrafast optical switching by use of fully phase-matched cascaded second-order nonlinearities in a polarization-gate geometry," Opt. Lett., vol. 22, pp. 245-247, 1997.

J. U. Kang, Y. J. Ding, W. K. Burns, and J. S. Melinger, "Backward second-harmonic generation in periodically poled bulk LiNbO_3," Opt. Lett., vol. 22, pp. 862-864, 1997.

G. D. Landry and T. A. Maldonado, "Efficient nonlinear phase shifts due to cascaded second order processes in a counter-propagating quasiphase-matched configuration," Opt. Lett., vol. 22, pp. 1400-1402, 1997.

Y. J. Ding and J. B. Khurgin, "Second-harmonic generation based on quasiphase matching: A novel configuration," Opt. Lett., vol. 21, pp. 1445-1447, 1996.

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