Cone laser-gain module, double-side-pumped cone laser-gain module, cone laser amplifier, and cone laser oscillator

A double-side-pumped cone laser-gain module, comprising:

• two pump-light sources, configured to emit pump lights of a first wavelength along a laser-emission axis;
• a laser rod with its longitudinal axis parallel to the laser emission axis, disposed on a power-flow path of the pump lights and configured to absorb the pump lights to generate amplified laser lights of another wavelength along the laser-emission axis;
• and
• two cone structures with a collinear cone axis joining two smaller cone apertures, configured to accommodate the laser rod and configured to confine the pump lights toward the laser rod,
• wherein the collinear cone axis of the two cone structures is aligned parallel to the laser-emission axis,
• wherein the pump lights emitted from the two pump-light sources enter the two cone structures from two larger cone apertures toward the joint smaller cone apertures,
• wherein the pump lights, some of which diverge and initially miss the laser rod, are reflected and concentrated on the laser rod by the inner surfaces of the two cone structures.