Active waveguides for high power and high efficiency eco lasers

摘要

An active waveguide comprising active rods and passive rods having clad of respective polymers mechanically and optically coupled to one another to define a side excitation method.One or more elements embedded in one or both of the active rod and the passive rod have a refractive index of at least 1 * 10-3 lower than the lowest refractive index of each active rod and passive rod.The MM core of the active rod contains concentric inner and outer regions, while the luminal concentration in the outer region is less than 50% of the inner light emitter concentration, and the radius of the inner region is 92% higher than the radius of the outer region.The non absorbed excitation light at the output of the active waveguide is less than 1% of the delivered excitation light combined with the refractive index of the embedded element and the selectively doped core region to contribute to at least 86% of the laser efficiency.