Observation of Dynamic Extinction Ratio and Bit Error Rate Degradation Due to Thermal Effects in Integrated Modulators

We experimentally demonstrate how the thermal crosstalk between active and passive components limits the performance of integrated Mach-Zehnder (MZ) modulators operating in the radiofrequency regime. To evaluate the role of the distance between active and passive components, the MZs are placed at di...

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Bibliographic Details
Published in:Journal of lightwave technology 2015-06, Vol.33 (11), p.2199-2205
Main Authors: Gilardi, Giovanni, Yao, Weiming, Smit, Meint K., Wale, Micheal J.
Format: Article
Language:English
Subjects:
Equations
Heating
Mathematical model
Modulation
Optical switches
Radio frequency
Semiconductor optical amplifiers
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Summary:We experimentally demonstrate how the thermal crosstalk between active and passive components limits the performance of integrated Mach-Zehnder (MZ) modulators operating in the radiofrequency regime. To evaluate the role of the distance between active and passive components, the MZs are placed at different distances with respect to a semiconductor optical amplifier that represents the heat source. The thermal crosstalk is quantified by measuring the effects on the electro-optical response of MZ modulators considered as the test structure. Both extinction ratio and bit error rate degradation are measured. The proposed investigation allows the introduction of design rules, based on the minimum distance between components to ultimately avoid unwanted thermal effects. According to the result provided by our analysis, we also show how the ER degradation can be recovered.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2015.2409155