Title :
Analysis and characterization of traveling-wave electrode in electroabsorption modulator for radio-on-fiber application
Author :
Lim, Jiyoun ; Kang, Young-Shik ; Choi, Kwang-Seong ; Lee, Jong-Hyun ; Kim, Sung-Bock ; Kim, Jeha
Author_Institution :
Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
Comparing with a lumped electroabsorption modulator (EAM), we show the merits of a long EAM with traveling-wave electrode with high radio-frequency (RF) gain that could be used in high-frequency analog application. By terminating the RF output port with the characteristic impedance of 30 Ω, the device exhibited a large enhancement of 6 dB above 10 GHz in the electrical-to-optical response and a wide fractional bandwidth as estimated from simulation. In addition, an input impedance matching circuit of stub embedded on the device chip was found to be very effective for improving RF characteristics in the narrow band of frequency.
Keywords :
electro-optical modulation; electroabsorption; electrodes; impedance matching; integrated optics; integrated optoelectronics; microwave photonics; optical fibre communication; optical fibre testing; radiofrequency integrated circuits; RF output port termination; device chip; electrical-to-optical response; electroabsorption modulator; high-frequency analog application; input impedance matching circuit; narrow band of frequency; radio-frequency gain; radio-on-fiber application; traveling-wave electrode; wide fractional bandwidth; Bandwidth; Circuits; Coplanar waveguides; Electrodes; Fabrication; Frequency response; Impedance matching; Indium phosphide; Narrowband; Radio frequency;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2003.821740
