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The mode control of asymmetric Fabry-Perot optical modulators with multiple quantum wells

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5 Author(s)
Ronghan Wu ; Inst. of Semicond., Acad. Sinica, Beijing, China ; Zhibiao Chen ; Hongda Chen ; Wenzhi Gao
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The asymmetric Fabry-Perot (ASFP) mode position with the thickness of different index coating layer is calculated. The reason for the blue shift of the ASFP mode with the increasing thickness of low index coating layer is analyzed and this phenomenon is observed in experiments. With the wet-etching method, the ASFP mode can be tuned to the desired wavelength and thus the deviation of growth can be compensated. This method is used to improve the contrast ratio of modulators. With the ASFP mode located at different positions relative to the unbiased e-hh peak, different modulation characteristics are demonstrated

Published in:

IEEE Journal of Quantum Electronics  (Volume:33 ,  Issue: 11 )