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In this paper, we have proposed a localized dual-mode model to study push-pull modulation responses of DFB lasers. Numerical simulation shows that, with properly designed and controlled photon-photon resonance, an ultra-broad 3dB modulation bandwidth up to 50GHz is achievable.
In this paper, a novel differential precoding scheme is proposed for LTE systems. The proposed scheme utilizes a differential codebook to update the precoding matrix. Due to the temporal correlation of adjacency time slots in temporally correlated channels, the current precoding matrix is restricted in a limited scope around the previous precoding matrix. This approach utilizes the differential information...
White LED technology, which is regarded as an environment-friendly lighting, not only illuminates rooms but also provides short range wireless communication. Recently, DMT techniques like OFDM have been adopted for WLED communication. However as OFDM has the inherent high PAPR property, such a system produces flickering light that can be detected by human eyes. In this paper, the application of SC-FDMA...
Direct modulation characteristics have been investigated for a Fabry‐Perot laser diode coupled with a multimode fiber Bragg grating.Large signal modulation at 2.5 Gb/s with none‐return‐to‐zero format has been demonstrated for the 2‐cm long multimode fiber Bragg grating external cavity laser. By using a short external cavity of about 7.5 mm, small‐signal frequency responses larger than 8 GHz are achieved...
With explosive increasing of capacity in optical networks, XFP optical transceivers are widely employed. In this paper, an application of the optical transceivers with real-time diagnosis function in 40Gbit/s Polarization-Multiplexed Differential Quadrature Phase Shift Keying (PM-DQPSK) system was designed and realized. What's more, the electrical signal 10Gbit/s from XFP optical transceiver is too...
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