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We report waveguide-integrated Ge electro-absorption modulators operating at 1615nm wavelength with 3dB bandwidth beyond 50GHz and a capacitance of 10fF. A 2V voltage swing enables 4.6dB DC extinction ratio for 4.1dB insertion loss.
We discussed the impulse response (or the frequency response) of the TS-ADC for capturing high-speed electrical signals. It was shown that the upper bound for the frequency response is currently determined only by the optical modulator bandwidth, which is sufficient for capturing most electrical signals of interest today.
Multi-carrier system has been fuelled by large demand on frequency allocation, resulting in a crowded spectrum as well as large number of users requiring simultaneous access. Existing wireless systems may be utilized single frequency, single antenna and pulse for carrier transmission and reception. Problems of such system is that in case of failure the total system will become non operational. So...
We show that the symmetry properties of a dual output push-pull Mach-Zehnder modulator can be exploited for rejection of dispersion induced 2nd order non-linearities in the time-stretch analog to digital converter. Using differential modulation, followed by signal processing in digital domain, we experimentally demonstrate rejection of harmonic and intermodulation distortions. Simulations predict...
We show that the symmetry properties of the two outputs from a push-pull Mach-Zehnder modulator can be exploited to reject dispersion-induced second-order distortions in the time-stretch analog-to-digital converter (TS-ADC). Using differential operation and signal processing in the digital domain, we experimentally demonstrate suppression of the signal harmonics generated due to system nonlinearities...
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