Back to results
US 12,638,704 B2Granted
Electro-absorption modulator
AssigneesAirbus SAS, Cardiff University
InventorsBenjamin Maglio, Crisanto Quintana Sanchez, Peter Smowton
Life of this patent
Estimating the term…
Abstract
An electro-absorption modulator 100 including a quantum well 102 configured to provide a variable electromagnetic absorption spectrum in response to an applied electric field, wherein the quantum well is a type-II quantum well comprising two material layers, each material layer having a graded material composition, such that the potential in each material layer varies as a function of position.
Claims19
An electro-absorption modulator comprising:
- an input configured to receive an incoming beam of electromagnetic radiation;
- a quantum well configured to:
- (i) provide a variable electromagnetic absorption spectrum (ii) to receive and modulate the incoming beam of electromagnetic radiation in response to an electric field applied to the quantum well, and (iii) generate a modulated beam of electromagnetic radiation, and
- an output configured to pass the modulated beam from the electro-absorption modulator,
- wherein the quantum well is a type-II quantum well comprising two material layers, wherein a first material layer of the two material layers has a first material composition and a second material layer of the two material layers has a second material composition which differs from the first material composition, and
- wherein the first material composition and the second composition are each graded such that a potential in each of the two material layers varies as a function of position.
3 more elements
Dependencies are inferred from the claim text.