Patent ID: 9088127
Filing Date: 2015-07-21
Classification: B82Y,H01S

Abstract:
1. A method of modulating a quantum dot laser comprising the steps of: providing a quantum dot laser having a tuning contact connected thereto, the quantum dot laser having a cavity gain that increases, reaches a peak, and subsequently decreases, in response to increasing a tuning current, such that the laser lases in a first mode when the tuning current provided by the tuning contact is in an active range between first and second current values and the laser does not lase at all when the tuning current provided by the tuning contact is in an inactive range outside these values; and varying the tuning current from a first portion of the inactive range, through the active range to a second portion of the inactive range on the opposite side of the active range to the first portion, so producing duobinary modulation.