Applications of highly-nonlinear chalcogenide glass devices tailored for high-speed all-optical signal processing

作者：Pelusi Mark D; Ta'eed Vahid G; Fu Libin; Magi Eric; Lamont Michael R E; Madden Steve; Choi Duk Yong; Bulla Douglas A P; Luther Davies Barry; Eggleton Benjamin J

来源：IEEE Journal of Selected Topics in Quantum Electronics, 2008, 14(3): 529-539.

DOI：10.1109/JSTQE.2008.918669

• nonlinear optics
• optical planar waveguides
• optical propagation in nonlinear media
• optical signal processing
• optical waveguides

Ultrahigh nonlinear tapered fiber and planar rib Chalcogenide waveguides have been developed to enable highspeed all-optical signal processing in compact, low-loss optical devices through the use of four-wave mixing (FWM) and cross-phase modulation (XPM) via the ultra fast Kerr effect. Tapering a commercial AS(2)Se(3) fiber is shown to reduce its effective core area and enhance the Kerr nonlinearity thereby enabling XPM wavelength conversion of a 40 Gb/s signal in a shorter 16-cm length device that allows a broader wavelength tuning range due to its smaller net chromatic dispersion. Progress toward photonic chip-scale devices is shown by fabricating AS(2)S(3) planar rib waveguides exhibiting nonlinearity up to 2080 W(-1) center dot km(-1) and losses as low as 0.05 dB/cm. The material's high refractive index, ensuring more robust confinement of the optical mode, permits a more compact serpentine-shaped rib waveguide of 22.5 cm length on a 7-cmsize chip, which is successfully applied to broadband wavelength conversion of 40-80 Gb/s signals by XPM. A shorter 5-cm length planar waveguide proves most effective for all-optical time-division demultiplexing of a 160 Gb/s signal by FWM and analysis shows its length is near optimum for maximizing FWM in consideration of its dispersion and loss.

• 出版日期2008-6