Intermodulation Distortion in Multiple Quantum-Well Electroabsorption Modulator

다중 양자 우물 구조의 전계 흡수 변조기의 혼변조 왜곡 특성

  • 윤영설 (중앙대학 전자전기공학부) ;
  • 최영완 (중앙대학 전자전기공학부)
  • Published : 2005.06.01


Linearity is an important property of optical devices for analog communications. In this paper, we study the 3rd-order interrnodulation distortion (IMD3) of an Inp/InGaAsP multiple-quantum-well (MQW) traveling-wave type electroabsorption modulator (TW-EAM). We observe abnormal notches in the IMD3 results those were different from notches by general transfer curve of electroabsorption modulators (EAMs). We analyze the phenomena through absorption coefficients according to wavelengths and bias voltages to verify appearance of the abnormal notchs, where it can be known to result from Stark-shift and broadening. We propose the method to enhance linearity of MQW-EAMs by using these effects.


Traveling-wave type


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