SureBlock™ ultra narrow-band notch filters

Ondax’s SureBlock™ ultra narrow-band notch filters are the ideal solution for highly selective wavelength applications like low frequency (low wavenumber) THz-Raman^® spectroscopy.
With laser line attenuation of up to 99.9999% (optical density: OD4) and transition width of <10 cm^-1, SureBlock™ filters can dramatically improve the ability of any Raman system to resolve low frequency Raman scattering. High transmittance on both sides of the notch enables both Stokes and anti-Stokes Raman spectra to be observed simultaneously.
Individual filters are mounted in 1” housings for compatibility with standard 1” optical systems. Alternatively, our SureBlock™ XLF Series THz-Raman^® Spectroscopy and Filter Systems integrate the notch filters into a rugged, pre-aligned, light-tight enclosures with optional laser sources, ASE filtering, and free space or fiber inputs & outputs.

Available at standard Raman wavelengths: 488, 514, 532, 633, 785, 808, 830, 976 and 1064nm. Custom wavelengths are available on demand. We also recommend the use of our NoiseBlock™ ASE Filters and 90/10 Beamsplitter Filters to achieve optimum performance of the notch filters when using diode or diode-pumped laser sources Ondax SureBlock™ Notch filters are reflective volume holographic filters (VHGs), produced in a proprietary glass designed for long lifetime, high efficiency and excellent transmission. Ondax’s fabrication process is highly stabilized to ensure excellent part-to-part repeatability.

Features

• Ultra narrow rejection bandwidth

• Highly repeatable performance

• Environmentally stable at high temperature and humidity

• No degradation over time, even under high power illumination conditions

Applications

• Low Frequency THz-Raman^®Spectroscopy

• Structural Studies of Nanomaterials

• Bio-medical and Solid State Laser Systems

• Wide-band Notch Filter Replacement

Ultra narrow notch transition to 50% transmission

High Transmission on both sides of notch wavelength