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.
- Ultra narrow rejection bandwidth
- Highly repeatable performance
- Environmentally stable at high temperature and humidity
- No degradation over time, even under high power illumination conditions
- Low Frequency THz-Raman® Spectroscopy
- Structural Studies of Nanomaterials
- Bio-medical and Solid State Laser Systems
- Wide-band Notch Filter Replacement
|Parameter||488nm – 1064nm|
|Spectral Transition Width (center to 50% transmission)||<10 cm-1|
|Optical Density at Laser Line (each filter)||>4|
|Free Space Aperture Diameter||Standard: 9mm in 1″ mount, Custom sizes available|