CO2 laser Optics, CO2 replacement optics for industrial high power lasers by Ophir Optronics
Output couplers
Partial Reflector
The output coupler usually has reflectance in the range 40% to 70%. In order to optimize power and spatial profile of the laser beam, the output coupler and rear mirror have optical surfaces with well-defined radii of curvature. As the output coupler transmits a high-power laser beam, it is made of ZnSe in order to minimize absorption and thermal lensing. The rear mirror usually has reflectance 99.5% which means that the transmitted laser beam has low power. However, as absorption in the coating is higher than in the output coupler, it is more important to use a substrate material with high thermal conductivity. Therefore, Germanium or Gallium Arsenide are used in most lasers.
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Optic TypeOphir P/NDiameterEdge ThicknessReflection S1AbsorptionSurface Radius
InchmmInchmmS1CC mmS2CX mm
 Output Coupler 35%620561.75"44.450.25"6.3535±1.5<0.10%20MCC10MCX
 Output Coupler 40%616631.5"38.10.236"640±2<0.09%15MCC10MCX
 Output Coupler 40%615421.5"38.10.314"840±3<0.13%15MCC7.5MCX
 Output Coupler 40%618831.5"38.10.314"840±3<0.13%40MCC20MCX
 Output Coupler 40%618871.5"38.10.314"840±3<0.13%50MCC25MCX
 Output Coupler 50%614101.1"27.940.219"5.5850±1<0.05%20MCC15MCX
 Output Coupler 50%613811.1"27.940.236"650±1<0.05%30MCC30MCX
 Output Coupler 50%616431.18"29.970.236"650±1<0.10%10MCC10MCX
 Output Coupler 50%618841.5"38.10.314"850±3<0.13%40MCC20MCX
 Output Coupler 50%618881.5"38.10.314"850±3<0.13%50MCC25MCX
 Output Coupler 60%619941.1"27.940.22"5.660±1<0.08%10MCC5MCX
 Output Coupler 60%615451.5"38.10.314"860±1<0.13%35MCC15MCX
 Output Coupler 65%614351"25.40.236"665±1<0.08%30MCC30MCX
 Output Coupler 65%618351"25.40.236"665±3<0.10%30MCC30MCX
 Output Coupler 70%614111.1"27.940.219"5.5870±1<0.05%20MCC20MCX
 Output Coupler 70%615461.1"27.940.236"670±3<0.12%PlanoPlano
 Output Coupler 50%630031.1"27.940.236"650±2<0.06%20.065MCC12MCX

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