Stories & Features

BrightLine Multiphoton LaserMUX Beam Combiners

Mar 5, 2017 by IDEX Health & Science

LaserMUX beam combinersSemrock’s BrightLine® Multiphoton LaserMUX beam combiners enable deeper tissue imaging and improved contrast in multi-color and multi-modal fluorescence microscopy. The filters set new performance standards by simultaneously achieving high transmission, high reflection, and low GDD over both reflection & transmission, while maintaining minimal wavefront distortion. Ideal for combining two femtosecond pulsed laser beams, they are perfect for optogenetics and other life science applications.

Combine two or more femtosecond pulsed lasers such as Ti:Sapphire (& OPO coupled), neodymium and ytterbium-doped fiber and glass lasers, and Cr-forsterite lasers.


diagram illustrating how pulsed lasers would reflect off LaserMUX beam combiners

transmission graph for ff850 versus ff980 filters

Minimal pulse dispersion for femtosecond laser applications

     < ± 100 fs² GDD at popular laser wavelengths

     < ± 500 fs² GDD over entire reflection and transmission

compare ff850 filters reflection GDD with P-pol versus S-pol

Wavefront performance designed for deep tissue and in vivo imaging

      < 1λ P-V Reflected Wavefront Error (RWE) on 1 mm

      < λ/10 P-V Transmitted Wavefront Error (TWE)

Achieve higher transmission and reflection %, as well as expanded range for reflection & transmission bands by aligning polarization of laser beam with the spectral performance of the filter.


transmission graph comparing ff850 filters at Avg-pol, P-pol, and S-pol

Nominal Edge 

Part Number

Reflection Range
(> 95%, average)

Transmission Range
(>93%, average)

 850 nm


670 - 815 nm

890 - 2100 nm

In Stock

980 nm


770 - 938 nm

1022 - 2100 nm

In Stock

Click to download the BrightLine Multiphoton LaserMUX Beam Combiner Data Sheet