| Title |
Intermodulation Distortion in Multiple Quantum-Well Electroabsorption Modulator |
| Authors |
윤영설(Yun Youngseol) ; 최영완(Choi Young-Wan) |
| Keywords |
전계흡수 변조기 ; 비선형성 ; 아날로그-광통신 Traveling-wave type |
| Abstract |
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. |