Title :
Combined Franz-Keldysh and quantum-confined Stark effect waveguide modulator for analog signal transmission
Author :
Welstand, R.B. ; Zhu, J.T. ; Chen, W.X. ; Clawson, A.R. ; Yu, P.K.L. ; Pappert, S.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
fDate :
3/1/1999 12:00:00 AM
Abstract :
A novel approach to the design of electroabsorption waveguide modulators for use in broadband, analog radio frequency (RF) links is presented. The approach utilizes a linear combination of two electroabsorption effects (the Franz-Keldysh effect and the quantum-confined Stark effect) to improve the spurious-free dynamic range of the waveguide modulator. Measured transfer curves verify simultaneous improvement in linearity and modulation efficiency for an exemplary combination structure. Residual absorption is modeled to determine the impact on modulation efficiency
Keywords :
electro-optical modulation; electroabsorption; optical communication equipment; optical design techniques; quantum confined Stark effect; Franz-Keldysh effect; Franz-Keldysh waveguide modulator; analog signal transmission; broadband analog RF links; electroabsorption effects; electroabsorption waveguide modulator design; linearity; modulation efficiency; quantum-confined Stark effect waveguide modulator; residual absorption; spurious-free dynamic range; transfer curves; Absorption; Dynamic range; Fiber nonlinear optics; Noise figure; Optical noise; Optical receivers; Optical transmitters; Optical waveguides; Radio frequency; Stark effect;
Journal_Title :
Lightwave Technology, Journal of
