Partial Reflectors » Laser Output Couplers

Laser Output Couplers are designed for use as resonator mirrors for low, medium and high power lasers. They divide an incident, monochromatic beam into reflected and transmitted components with the specified intensity ratio.

They are coated on one side with an all dielectric, partial reflection coating, and on the reverse side with a high efficiency, narrowband, anti-reflection coating.

Substrates are available with plano/plano, plano/concave and plano/convex surfaces.

sketch-output-coupler

RMI Standard Specifications
Materials:	BK7, UVFS, CaF₂, ZnSe, Ge, Chalcogenide glass
Angle of Incidence:	0º
Surface Figure: BK7, UVFS: CaF₂: ZnSe, Ge, Chalcogenide glass:	Plano [Concave/Convex] λ/20 [λ/10] at 633 nm λ/20 [λ/10] at 633 nm λ/40 [λ/20] at 10.6 μm
Surface Quality: BK7, UVFS: CaF₂: ZnSe, Ge, Chalcogenide glass:	Both Surfaces 10-5 20-10 40-20
Diameter Tolerance:	+ 0.000", – 0.010"
Thickness Tolerance:	± 0.010"
Radius Tolerance:	± 0.5%
Wedge:	≤ 3 arc minutes
Bevels:	0.010" - 0.030" at 45°
Clear Aperture:	Central 85% of diameter
Reflectance:	R < 90% ± 3% R = 90% – 95% ± 2% R = 96% – 98% ± 1% R > 98% ± 0.5%

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Partial Reflectors » Laser Output Couplers