Title :
Linearity of double heterostructure electroabsorptive waveguide modulators
Author :
Linder, Norbert ; Kiesel, Peter ; Kneissl, Michael ; Knüpfer, Bernhard ; Quassowski, Sven ; Döhler, Gottfried H. ; Trankle, Gunther
Author_Institution :
Inst. fur Tech. Phys. I, Erlangen-Nurnberg Univ., Germany
fDate :
9/1/1995 12:00:00 AM
Abstract :
The linearity of electrooptical waveguide modulators based on the Franz-Keldysh effect with respect to the voltage-transmission characteristic has been investigated experimentally and theoretically. For a GaAs-AlGaAs double heterostructure modulator the values of the signal-to-noise ratio due to anharmonic and intermodulation distortion have been found to be small enough to suffice the requirements for analog optical transmission in multichannel broad-band fiber network systems compatible to existent cable networks. The results are also applicable to materials in the bandgap region of the optimum fiber transmission wavelengths around 1.3 μm and 1.5 μm. The advantages in comparison with directly modulated semiconductor lasers will be discussed
Keywords :
III-V semiconductors; aluminium compounds; electro-optical modulation; electroabsorption; gallium arsenide; intermodulation distortion; optical communication equipment; optical fibre communication; optical fibre networks; semiconductor heterojunctions; 1.3 mum; 1.5 mum; Franz-Keldysh effect; GaAs-AlGaAs; GaAs-AlGaAs double heterostructure modulator; analog optical transmission; anharmonic distortion; bandgap region; cable networks; directly modulated semiconductor lasers; double heterostructure electroabsorptive waveguide modulators; electrooptical waveguide modulators; intermodulation distortion; linearity; multichannel broad-band fiber network systems; optimum fiber transmission wavelengths; signal-to-noise ratio; voltage-transmission characteristics; Electrooptic modulators; Electrooptical waveguides; Intermodulation distortion; Linearity; Optical fiber cables; Optical fiber networks; Optical waveguide theory; Optical waveguides; Signal to noise ratio; Voltage;
Journal_Title :
Quantum Electronics, IEEE Journal of
