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Compact and electro-optic tunable interleaver in lithium niobate thin film

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Abstract

We propose and experimentally demonstrate a compact and electro-optic (EO) tunable interleaver in X-cut lithium niobate thin film using an asymmetrical Mach–Zehnder interferometer configuration. Our typical fabricated device has an EO interactive length of 1.35mm and a total length of 4.0mm. Over a wide wavelength range from 1528 to 1605 nm, the device exhibits polarization-insensitive center wavelengths and channel spacing of 49.7GHz, but a slightly different extinction ratio of 10–20 and 12–23 dB, and electrical wavelength tuning sensitivity of 18 and 16pm/V for the transverse electric- and transverse magnetic-polarized input light, respectively. The proposed interleaver also has the potential to be used as a tunable filter or a wavelength-selective switch.

© 2018 Optical Society of America

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