Trouble awaits anyone not realising that the term “CO₂ laser optics” is mostly understood to refer to optics designed for the common CW (Continuous Wave) CO2 laser types (fast axial flow, slab discharge etc). A customer with a high power TEA pulsed laser using mirrors they sourced form Germany found they completely failed within a few seconds due to the very high laser pulse energies. After waiting several months for the mirrors to be delivered, a few seconds of use was disappointing!
We have recently helped several customers using TEA (Transversely Excited Atmospheric) CO₂ lasers, which are a PULSED CO₂ laser type.
Our Gold coating works with both high power CW and Megawatt pulsed TEA lasers. For this customer we were able to take the used failed mirrors, remove the remains of the ablated dielectric coating, Gold coat them, and return them, taking just a few days.
Interestingly the first true high power TEA CO₂ laser was developed in Baldock, England, just 5 miles away from our factory here in Biggleswade.
Our Gold coated Copper mirrors have been independently certificated as having an LIDT of 46J/cm² in a 80ns pulse. Our competitors products with dielectric coatings were measured at less than 10J/cm2 so quite an advantage