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Proceedings Paper

Highly dispersive photonic crystal waveguides and their applications in optical modulators and true-time delay lines
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Paper 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, Iπ, across the active region is as low as 0.15 mA, which is equivalent to a Vπ 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).

Paper Details

Date Published: 1 March 2006
PDF: 10 pages
Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 61280Y (1 March 2006); doi: 10.1117/12.643080
Show Author Affiliations
Yongqiang Jiang, Univ. of Texas at Austin (United States)
Tao Ling, Univ. of Texas at Austin (United States)
Lanlan Gu, Univ. of Texas at Austin (United States)
Wei Jiang, Univ. of Texas at Austin (United States)
Omega Optics Inc. (United States)
Xiaonan Chen, Univ. of Texas at Austin (United States)
Ray T. Chen, Univ. of Texas at Austin (United States)


Published in SPIE Proceedings Vol. 6128:
Photonic Crystal Materials and Devices IV
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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