For use with conventional 'Low NA' pumps, the TrueMode-15 fibre laser cavity provides up to 36 pump ports suitable for up to 750 Watts output power. To keep pace with emerging higher power diodes (>100W) and 'High NA' using fuller fill, the TrueMode-22 fibre laser cavity provides capability for up to 750W through a maximum of 16 pumping ports. The most recent generation, the TrueMode-kW platform provides the benefit of using large numerical aperture pump modules and still have access to up to 36 pumping ports. The TrueMode-kW cavity delivers 1kW or more output power. TrueMode cavities are designed to support one of two delivery options; single-mode or compatible output fibre.