Highly dispersive photonic crystal waveguides and their applications in optical modulators and true-time delay lines

Yongqiang Jiang; Tao Ling; Lanlan Gu; Wei Jiang; Xiaonan Chen; Ray T. Chen

doi:10.1117/12.643080

1 March 2006 Highly dispersive photonic crystal waveguides and their applications in optical modulators and true-time delay lines

Yongqiang Jiang, Tao Ling, Lanlan Gu, Wei Jiang, Xiaonan Chen, Ray T. Chen

Author Affiliations +

Proceedings Volume 6128, Photonic Crystal Materials and Devices IV; 61280Y (2006) https://doi.org/10.1117/12.643080
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States

Abstract

An ultra-compact silicon electro-optic modulator was experimentally demonstrated based on highly dispersive silicon photonic crystal (PhC) waveguides. Modulation operation was demonstrated by carrier injection into an 80 μm-long silicon PhC waveguide of a Mach-Zehnder interferometer (MZI) structure. The π phase shift driving current, I_π, across the active region is as low as 0.15 mA, which is equivalent to a V_π of 7.5 mV when a 50 Ω impedance-matched structure is applied. The modulation depth is 92%. Highly dispersive PhC fibers were previously proposed to reduce the payload of true-time delay (TTD) modules for phased-array antenna (PAA) systems. The payload reduction factor is proportional to the enhanced dispersion of highly dispersive PhC fibers. An ultra-large dispersion of -1.1×10⁴ ps/nm•km with the full width at half maximum (FWHM) of 40 nm was numerically simulated from a dual core PhC fibers. The payload reduction factor of the TTD module is as high as 110 compared to that using conventional dispersion compensation fibers (D = -100 ps/nm•km).

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Yongqiang Jiang, Tao Ling, Lanlan Gu, Wei Jiang, Xiaonan Chen, and Ray T. Chen "Highly dispersive photonic crystal waveguides and their applications in optical modulators and true-time delay lines", Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 61280Y (1 March 2006); https://doi.org/10.1117/12.643080

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