期刊
OPTICAL AND QUANTUM ELECTRONICS
卷 37, 期 1-3, 页码 77-93出版社
SPRINGER
DOI: 10.1007/s11082-005-1124-5
关键词
coupled-cavity waveguides; Mach-Zehnder interferometer; photonic crystals; photonic integrated circuits
Photonic crystal technology allows the creation of optical waveguides with low sharp-bending losses as well as ultra-low group velocity. This last property is particularly interesting to develop highly-compact optical devices based on the controlled modification of the optical phase of the signals traveling through the waveguides. Among these devices, the Mach-Zehnder interferometer acquires fundamental importance because it can be used as a building block of more complex optical devices and functionalities such as optical filters, wavelength demultiplexers, channels interleavers, intensity modulators, switches and optical gates. In this paper, the performance of a Mach-Zehnder interferometer consisting of two coupled-cavity waveguides with different lengths created in a two-dimensional photonic crystal is theoretically analyzed. We also provide simulation results using a finite- difference time-domain code that confirm the theoretical analysis. The main limitations in the performance of the structure are addressed and discussed.
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