405 nm Ultrasteep Raman Long-Pass Filter

The MP-LPF-405 is an ultrasteep long-pass edge filter specifically designed for Raman spectroscopy with 405 nm laser excitation. It provides deep blocking > OD6 at the 405 nm laser line and on the short-wavelength side, while efficiently transmitting long-wavelength signals in the range of 410.3-913.5 nm.With a narrow transition width of only 4.1 nm and an ultrasteep edge of 0.5 %, this filter allows Raman scattering signals to be acquired very close to the 405 nm laser line. It is particularly suitable for applications requiring low Raman shift detection, weak Raman signals, and high signal-to-noise ratio spectra. The filter is fabricated on fused silica substrates, offering excellent UV transmission, low autofluorescence, and high optical stability. It is ideal for Raman spectrometers, laser spectroscopy, biomedical detection, and precision research instruments.