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US09294199B2 Method for generating an optimized return-to-zero pulse shape against aggressive optical filtering and an optical transmitter implementing the method 有权
用于产生针对侵略性光学滤波的优化的归零脉冲形状的方法和实现该方法的光发射器

Method for generating an optimized return-to-zero pulse shape against aggressive optical filtering and an optical transmitter implementing the method
Abstract:
An optical transmitter comprises: first and second sets of optical in-phase and quadrature modulators; an integrable tunable laser assembly; a first polarization beam splitter that is configured to divide the continuous-waveform optical signal into a x-polarized tributary and a y-polarized tributary, each of the x-polarized tributary and the y-polarized tributary is modulated by one of the first and second sets of optical in-phase and quadrature modulators in accordance with the two respective input signals; a second polarization beam splitter that is configured to combine the modulated x-polarized tributary and the modulated y-polarized tributary into one optical signal; and an optical modulator that is configured to modulate the combined optical signal using a driving voltage, wherein the driving voltage has a bias point that is reduced by a predefined offset from a predefined reference voltage level.
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