SureBlock™ Ultra-Narrowband Notch Filters
SureBlock™ Ultra-Narrowband Notch Filters

SureBlock™ Ultra Narrow-band Notch Filters

Coherent’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 and outputs.

Available at standard Raman wavelengths: 488, 514, 532, 633, 785, 808, 830, 976 and 1064 nm. 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 SureBlock Notch filters are reflective volume holographic filters (VHGs), produced in a proprietary glass designed for long lifetime, high efficiency, and excellent transmission. Coherent’s fabrication process is highly stabilized to ensure excellent part-to-part repeatability.

Ultra Narrow-Band Notch Filters for Raman Spectroscopy

Specification Summary

Parameter 488 nm – 1064 nm
Spectral Transition Width (center to 50% transmission) <10 cm-1
Optical Density at Laser Line (each filter) >4
Free Space Aperture Diameter Standard: 9 mm in 1″ mount, Custom sizes available

SureBock™ Specifications

Applications

Application

Raman Spectroscopy

Features & Benefits


  • Ultra-narrow rejection bandwidth
  • Highly repeatable performance
  • Environmentally stable at high temperature and humidity
  • No degradation over time, even under high-power illumination conditions

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Risk factors: Except for the historical information contained here, many of the matters discussed in this Web site are forward-looking statements, based on expectations at the time they were made, that involve risks and uncertainties that could cause our results to differ materially from those expressed or implied by such statements. These risks are detailed in the “Factors That May Affect Future Results” section of our latest 10-K or 10-Q filing. Coherent assumes no obligation to update these forward-looking statements.


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