Title :
Normal-mode small-signal analysis of traveling-wave directional couplers
Author :
Chung, Haeyang ; Cahng, W.S.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
fDate :
5/1/1992 12:00:00 AM
Abstract :
The small-signal frequency responses of the 1×2 and 2×2 directional coupler traveling-wave modulators are analyzed in closed forms including the effect of both the optical/microwave velocity mismatch and microwave loss. When the microwave loss is negligible, the small-signal bandwidths of 1×2 and 2×2 directional coupler traveling-wave modulators are 20 and 28%, respectively, larger than that of an interferometric modulator with the same electrode length. However, when the microwave loss is large, the 1×2 coupler has a larger bandwidth
Keywords :
directional couplers; electro-optical devices; optical couplers; optical losses; optical modulation; closed forms; directional coupler traveling-wave modulators; electrooptic travelling wave modulators; microwave loss; normal mode small signal analysis; optical/microwave velocity mismatch; small-signal bandwidths; small-signal frequency responses; Bandwidth; Directional couplers; Equations; Frequency domain analysis; Frequency response; Nonlinear optics; Optical losses; Optical modulation; Time domain analysis; Waveguide theory;
Journal_Title :
Quantum Electronics, IEEE Journal of
