Title :
Enhanced linear dynamic range property of Franz-Keldysh effect waveguide modulator
Author :
Welstand, R.B. ; Sun, C.K. ; Pappert, S.A. ; Liu, Y.Z. ; Chen, J.M. ; Zhu, J.T. ; Kellner, A.L. ; Yu, P.K.L.
Author_Institution :
Dept. of Electr. Eng., California Univ., San Diego, La Jolla, CA, USA
fDate :
7/1/1995 12:00:00 AM
Abstract :
The spurious-free dynamic range (SFDR) of an InGaAsP-InP Franz-Keldysh effect (FKE) waveguide modulator is studied. Low-biasing the FKE modulator is shown to enhance the SFDR by 22 dB with a 3-dB optical power penalty. Polarization-independent RF operation is also obtained with low bias. At 2 mA photocurrent, the simulated narrowband and broadband SFDR are, respectively, 127 dB and 104 dB in a 1-Hz bandwidth. The measured result projects a narrowband SFDR of 129 dB-Hz/sup 4/5/ at this photocurrent.<>
Keywords :
III-V semiconductors; electro-optical modulation; gallium arsenide; indium compounds; optical waveguides; 1 Hz; 2 mA; Franz-Keldysh effect waveguide modulator; InGaAsP-InP; broadband SFDR; linear dynamic range; low-biasing; narrowband SFDR; optical power; photocurrent; polarization-independent RF operation; simulation; spurious-free dynamic range; Dynamic range; High speed optical techniques; Narrowband; Nonlinear optics; Optical distortion; Optical modulation; Optical polarization; Optical waveguides; Radio frequency; Sun;
Journal_Title :
Photonics Technology Letters, IEEE
