Patent ID: 8885676
Filing Date: 2014-11-11
Classification: B82Y,H01S

Abstract:
1. A laser device, comprising: a first mirror with a first surface; a second mirror with a second surface at least partially facing the first surface of the first mirror, the first and second mirrors defining a resonant optical cavity in which electromagnetic energy is amplified by stimulated emission of coherent radiation that is partially transmitted through the second mirror; a semiconductor optical amplifier disposed at least partially between the first and second surfaces; wherein the semiconductor optical amplifier gain exceeds the loss within the resonant optical cavity over a broad spectral bandwidth; an electrical or optical pump providing energy to the semiconductor optical amplifier; and a graphene saturable absorber disposed at least partially between the first and second surfaces; wherein the graphene saturable absorber operates in a passive mode; wherein the laser device emits stimulated coherent radiation through the second mirror with center wavelengths of about 1,800 nm or more and about 25,000 nm or less; and has a spectral width of about 0.006% or more of a center wavelength.