Linearization of 1.3-/spl mu/m MQW electroabsorption modulators using an all-optical frequency-insensitive technique

Wide-bandwidth lasers and modulators for RF photonics

“…The idea is to apply two optical carriers at different wavelengths and power levels to the same modulator while applying a single dc bias and RF signal [43]. Both optical carriers are modulated at different levels since they are at different wavelengths.…”

Slope Efficiency and Dynamic Range of Traveling-Wave Multiple-Quantum-Well Electroabsorption Modulators

“…The photoluminescence peak wavelength of strain-compensation MQW active region is 1510 nm. This is the main difference from other EAMs [6], [8], [9]. The photoluminescence peak shift will improve the slope efficiency of the EAMs at low bias.…”

“…2. Because of this strong wavelength dependence, the linearity of EAMs can be improved by tuning the input light wavelength, and the dynamic range can be enhanced [8].…”

Analog characterization of low-voltage MQW traveling-wave electroabsorption modulators

“…The peak slope efficiency is about 4/V, which happens around 1553 nm. Because of this strong wavelength dependence, the linearity of EAMs can be improved by tuning the input light wavelength, and the dynamic range can be enhanced [8].…”

“…Thus, we expect that the third-order distortion can be minimized and a high dynamic range can be achieved by adjusting both bias voltage and the input optical power. Although tuning the input optical wavelength is also an alternative to minimize the third-order distortion [8], adjusting the input optical power is a cost-effective and simple way tp achieve this purpose. To further improve the SFDR, the fifth-order distortion also needs to be reduced.…”