Abstract

This paper analyzes the characteristics of the variable coupling coefficient nonlinear directional coupler (VCC NLDC) in detail. The self-switching transmission curves of three types of NLDC with different coupler length are compared. Their phase-controlled transmission curves are compared, and these device acting as pump-controlled switches are analyzed. It is found that the VCC NLDCs show digital characteristics with the increase of the input power. As phase-controlled devices, the response of the VCC NLDC is binarylike when the input power is high. As pump-controlled devices, the transmission curves of the signal are similar to their self-switching transmission curves, except for some specific details.

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Appl. Opt. (1)

J. Lightwave Technol. (1)

G. I. Stegeman, E. M. Wright, N. Finlayson, R. Zanoni and C. T. Seaton, "Third order nonlinear integrated optics", J. Lightwave Technol., vol. 6, pp. 953-970, June 1988.

Opt. Lett. (4)

Other (13)

S. Wabnitz, E. M. Wright, C. T. Seaton and G. I. Stegeman, "Instability and all-optical phase-controlled switching in a nonlinear directional coherent coupler", Appl. Phys. Lett. , vol. 19, pp. 838-840, 1986.

C. G. Krautschik and G. I. Stegeman, "Phase controlled all-optical switching in rocking filter fibers", App. Phys. Lett., vol. 61, pp. 1751-1753, 1992.

P. Ferro, S. Trillo and S. Wabnitz, "Phase control of a nonlinear coherent coupler: The multi-beat length twisted birefrigent fiber", Appl. Phys. Lett. , vol. 64, pp. 2782-2784, 1994.

J. S. Aitchison, A. Villeneuve, J. U. Kang and G. I. Stegeman, "Multiplexing and de-multiplexing using an AlGaAs nonlinear directional couplers", in IEE Colloquium on Toward Terabit Transmission (Digest, 1995/10),, pp. 7/1-7/6.

J. S. Aitchison, A. H. Kean, C. N. Ironside, A. Villeneuve and G. I. Stegeman, "Ultrafast all-optical switching in Al0.18Ga0.82 as directional coupler in 1.55 µ m spectral region", Electron. Lett., vol. 27, pp. 1709-1710, 1991.

A. Villeneuve, K. Al-Hemyari, J. U. Kang, C. N. Ironside, J. S. Aitchison and G. I. Stegeman, "Demonstration of all-optical demultiplexing at 1555 nm with an AlGaAs directional coupler", Electron. Lett., vol. 29, pp. 721-722, Apr. 1993.

J. U. Kang, G. I. Stegeman and J. S. Aitchison, "All-optical multiplexing of femtosecond signals using an AlGaAs nonlinear directional coupler", Electron. Lett., vol. 31, pp. 118-119, Jan. 1995.

Y. Wang, "Nonlinear optical limiter and digital optical switch by cascaded nonlinear couplers: Analysis", J. Lightwave Technol. , vol. 17, pp. 292-297, Feb. 1999.

V. Leutheuser, U. Langbein and F. Lederer, "Optical response of a nonlinear bent directional couplers", Opt. Commun., vol. 75, pp. 251 -255, 1990.

G. J. Liu, B. M. Liang, Q. Li and G. L. Jin, "Multiple coupling length nonlinear directional couplers with variable coupling coefficient", Opt. Commun., vol. 218, pp. 113-117, 2003.

J. P. Sabini, N. Finlayson and G. I. Stegeman, "All-optical switching in nonlinear X junctions", Appl. Phys. Lett., vol. 55, pp. 1176-1178, 1989.

G. I. Stegeman and E. M. Wright, "All-optical waveguide switching", Opt. Quantum. Electron., vol. 22, pp. 95-122, 1990.

S. M. Jensen, "The nonlinear coherent coupler", IEEE J. Quantum Electron., vol. QE-18, pp. 1580-1583, Oct. 1982.

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