Applications of Highly-Nonlinear Chalcogenide Glass Devices Tailored for High-Speed All-Optical Signal Processing
Applications of Highly-Nonlinear Chalcogenide Glass Devices Tailored for High-Speed All-Optical Signal Processing
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DOI：
10.1109/jstqe.2008.918669
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发表时间：
2008-06
影响因子：
4.9
通讯作者：
M. Pelusi;V. Ta'eed;L. Fu;E. Magi;M. Lamont;S. Madden;D. Choi;D. Bulla;B. Luther-Davies;B. Eggleton
中科院分区：
文献类型：
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作者：
M. Pelusi;V. Ta'eed;L. Fu;E. Magi;M. Lamont;S. Madden;D. Choi;D. Bulla;B. Luther-Davies;B. Eggleton
超高非线性锥形光纤和平面肋硫族化物波导已开发出来，通过使用四波混频 (FWM) 和通过超快克尔效应的交叉相位调制 (XPM)，在紧凑、低损耗光学器件中实现高速全光信号处理。研究表明，对商用 As2Se3 光纤进行锥形化可以减少其有效纤芯面积并增强克尔非线性，从而能够在较短的 16 cm 长度设备中对 40 Gb/s 信号进行 XPM 波长转换，由于其较小的净色散，该设备允许更宽的波长调谐范围。通过制造 As2S3 平面肋形波导，展示了光子芯片级器件的进展，该波导表现出高达 2080 W-1ldr km-1 的非线性和低至 0.05 dB/cm 的损耗。该材料的高折射率确保了对光学模式的更稳健的限制，允许在 7 厘米大小的芯片上实现更紧凑的长度为 22.5 厘米的蛇形肋形波导，该波导已成功应用于 XPM 40-80 Gb/s 信号的宽带波长转换。事实证明，长度较短的 5 厘米平面波导对于通过 FWM 对 160 Gb/s 信号进行全光时分解复用最为有效，并且分析表明，考虑到其色散和损耗，其长度接近最大化 FWM 的最佳长度。
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 As2Se3 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 As2S3 planar rib waveguides exhibiting nonlinearity up to 2080 W-1ldr 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-cm- size 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.