The electro‐optic (EO) characteristics of the strip‐loaded outdiffusion guide (SLOG) [1] are presented. A Mach‐Zehnder interferometer using the SLOG technique is fabricated for test. The results show that the EO effect is greatly enhanced and the extinction ratio is also larger compared to those made by the conventional titanium indiffusion technique. Moreover, the fabrication takes less time, yet the waveguide has no surface guide and less damage. Experimental and computer‐simulated results are also shown for comparison. © 1992 John Wiley & Sons, Inc.

Solitary‐wave excitation in a slab waveguide bounded by two different non‐Kerr‐like media exhibiting saturable self‐focusing nonlinearity is investigated. From numerical calculation it is found that solitary waves are emitted from the nonlinear interfaces. Moreover, mutual interaction between them is observed if the excitation is larger. The simulated results are useful for the study of three‐dimensional solitary waves. © 1992 John Wiley & Sons, Inc.

Optical field propagation in a nonlinear bent slab waveguide with a Kerr-like nonlinear cladding medium is presented. With increasing input power, the self-focusing effect significantly disturbs the original waveguide configuration, and a nonstationary evolution behavior is found. It is shown that the onset and the direction of soliton emission are sensitive to the guiding capability of the initial waveguide. In pariicular, a novel result is observed when the waveguide supporis more than one mode. 0 ABSTRACT A technique using a coaxial diode test fixture for the mount-independenr characterization of potentially unstable two-terminal devices is presented. A standard three-terminal calibration procedure using reference packages is used to calibrate to the surface of the packaged device. The test fixture is designed to present a low, nonresonant impedance to the device so that measurement resolution is enhanced. The Characterization of an IMPATT diode is presented as an example. 0 1993 John Wiley & Sons, Inc.

The propagation phenomena of nonlinear guided waves along a nonlinear waveguide bounded by two identical self‐focusing media are studied numerically. Both TE0 and TE1 guided waves are investigated. It is indicated that the derivative of the guided‐wave power flow with respect to the guided‐wave effective index can be a criterion for the stability of nonlinear guided waves under consideration. © 1993 John Wiley & sons, Inc.

A finite difference beam propagation method with nonuniform discretization is presented and validated for the analysis of solitary waves. We verify the accuracy of our nonuniform finite difference beam propagation method by demonstrating the evolution of the well‐known N soliton in nonlinear dispersive medium with and without higher‐order perturbed terms. Comparisons with the standard beam propagation method for calculation of both bright and dark solitons are also given and show that the nonuniform finite difference method is good for saving computing time, while maintaining the desired accuracy.