Abstract
Data exchange is an important function for flexible optical network, and it has been extensively investigated for the time and wavelength domains. The mode division multiplexing (MDM) has been proposed to further increase the transmission capacity by carrying information on different modes with only single wavelength carrier. We propose and experimentally demonstrate a novel on-chip data exchange circuit for the MDM signals by utilizing two micro-ring resonator (MRR) based mode converters. For demonstration, single and four wavelengths non-return-to-zero on-off-keying (NRZ-OOK) signals at 10 Gb/s carried on different modes are successfully processed, with open and clear eye diagrams. Measured bit error ratio (BER) results show reasonable power penalties. The proposed circuit can be potentially used in advanced and flexible MDM optical networks.
Highlights
The silicon photonic is commonly regarded as a promising solution for generation optical network due to its low cost, high refractive index contrast, and compatibility with matured Complementary Metal-Oxide-Semiconductor (CMOS) technologies [1]
Various reported mode division multiplexing (MDM) schemes are compatible with the existing wavelength division multiplexing (WDM) and polarization division multiplexing (PDM) technologies [3, 7,9, 11, 14, 17]
Similar to the existing wavelength exchange scheme [18] for WDM networks, proposed mode processing can be regarded as an improved function of conventional mode conversion (MC), using high performance mode converter
Summary
The silicon photonic is commonly regarded as a promising solution for generation optical network due to its low cost, high refractive index contrast, and compatibility with matured Complementary Metal-Oxide-Semiconductor (CMOS) technologies [1]. The wavelength division multiplexing (WDM) as the most mature multiplexing technology, which is widely used to increase the transmission capacity in the optic fiber networks, meets its bottleneck for the on-chip applications due to multiple laser sources on silicon platform are hard to realize and difficult to manage [2]. The data exchange is an important function for flexible and advanced optical network, and extensive investigation had been given to time and wavelength division multiplexed systems. Data exchange for MDM system has not been investigated, while it is highly desirable to increase robustness and throughput of the chip-level network utilizing mode multiplexing. Similar to the existing wavelength exchange scheme [18] for WDM networks, proposed mode processing can be regarded as an improved function of conventional MC, using high performance mode converter. The proposed circuit can be potentially used as routing component in advanced MDM optical networks
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