Title :
Digital optical phase control in ridge-waveguide phase modulators
Author :
Vawter, G. Allen ; Hietala, Vincent M. ; Kravitz, Stanley H.
Author_Institution :
Sandia Nat. Lab., Albuquerque, NM, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
The authors report a digital optical phase modulation concept based on depletion-edge-translation p-n junction GaAs/AlGaAs ridge-waveguide modulators. Digital modulation is achieved by integrating in series several discrete waveguide modulators with lengths related by successive factors of two. To illustrate the concept, the authors fabricated and demonstrated a three-bit digital phase modulator with 45 degrees resolution. This structure represents the first photonic integrated circuit that performs direct digital-electronic to analog-optical conversion.<>
Keywords :
III-V semiconductors; aluminium compounds; electro-optical devices; gallium arsenide; integrated optics; optical modulation; phase modulation; GaAs-AlGaAs; depletion-edge-translation p-n junction; digital optical phase modulation; digital-electronic to analog-optical conversion; optical modulators; optical phase control; optical waveguides; photonic integrated circuit; ridge-waveguide phase modulators; semiconductors; three-bit digital phase modulator; Digital modulation; Gallium arsenide; Optical control; Optical modulation; Optical variables control; Optical waveguides; P-n junctions; Phase control; Phase modulation; Photonic integrated circuits;
Journal_Title :
Photonics Technology Letters, IEEE
