Title :
A novel high-speed and wavelength insensitive Y-branch modulator with reduced and controllable chirp
Author :
Khan, M.N. ; Monnard, R. ; Miller, B.I. ; Burrow, E.C. ; Burrus, C.A.
Author_Institution :
Lucent Technol., AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
We propose and demonstrate a novel high-speed and wavelength insensitive Y-branch modulator in InGaAsP multiple-quantum-wells that exhibits negligible chirp and is also suitable for achieving controllable chirp. We raise the refractive index on one arm via applied bias and use the unbiased arm as a modulator. As the light switches to the biased arm, the modulated light in the unbiased arm experiences little phase change and therefore exhibits negligible chirp. Tunable chirp may be achieved using a push-pull bias configuration. We demonstrate that our modulator chirp is /spl sim/10 times lower than that of typical electroabsorption modulators.
Keywords :
III-V semiconductors; chirp modulation; electro-optical modulation; gallium arsenide; gallium compounds; indium compounds; integrated optics; semiconductor quantum wells; InGaAsP; InGaAsP multiple-quantum-wells; Y-branch modulator; applied bias; controllable chirp; electroabsorption modulators; high-speed; negligible chirp; push-pull bias configuration; refractive index; tunable chirp; unbiased arm; wavelength insensitive; Chirp modulation; Digital modulation; Optical modulation; Optical receivers; Optical refraction; Optical switches; Optical waveguides; Refractive index; Telecommunication control; Waveguide transitions;
Journal_Title :
Photonics Technology Letters, IEEE