Title :
Numerical simulation of a silicon-on-insulator waveguide structure for phase modulation at 1.3 μm
Author :
Vonsovici, Adrian ; Koster, Alain
Author_Institution :
Inst. d´´Electron. Fondamentale, Univ. de Paris-Sud, Orsay, France
fDate :
1/1/1999 12:00:00 AM
Abstract :
This paper presents an analysis of a silicon-on-insulator (SOI) waveguide structure to be used for phase modulation at 1.3 μm. The device consists of a two-dimensional (2-D) strip waveguide and a p+ /N-/N+ lateral diode to realize the effective index modulation by free-carrier injection. We have calculated that an effective index modulation between 5·10-4 and 10-3 could be obtained with current densities in the range from 500 to 1600 A/cm2. A detailed numerical simulation of the device transient response is also reported. We demonstrate that an effective index modulation of 5·10-4 could be obtained with a cutoff frequency of about 100 MHz. The phase modulator has a predicted figure-of-merit (FoM) of 160°/V/mm and a chirp factor of 25. Due to its full compatibility with complementary metal-oxide-semiconductor (CMOS)-SOI technology, the device is interesting for low-cost silicon-based optoelectronic systems
Keywords :
CMOS integrated circuits; current density; electro-optical modulation; integrated optics; integrated optoelectronics; optical communication equipment; optical waveguide theory; optical waveguides; phase modulation; refractive index; silicon-on-insulator; 1.3 mum; 2D strip waveguide; CMOS-SOI technology; SOI waveguide structure; chirp factor; complementary metal-oxide-semiconductor-SOI technology; current densities; cutoff frequency; device transient response; effective index modulation; free-carrier injection; full compatibility; low-cost silicon-based optoelectronic systems; numerical simulation; p+/N-/N+ lateral diode; phase modulation; phase modulator; predicted figure-of-merit; silicon-on-insulator waveguide structure; Chirp modulation; Current density; Cutoff frequency; Diodes; Numerical simulation; Phase modulation; Silicon on insulator technology; Strips; Transient response; Two dimensional displays;
Journal_Title :
Lightwave Technology, Journal of
