Custom Optical Notch Filter

What is a Notch Filter?

A Notch Filter is a specialized optical filter designed to block or attenuate a specific narrow band of wavelengths. While it allows other wavelengths to pass with high transmission.

This makes notch filters ideal for applications where precise wavelength blocking is required without affecting the overall light signal.

It can effectively eliminate interference signals at specific frequencies.

Key Features of Notch Filters

• Narrowband Blocking: The notch filter can effectivly block a targeted wavelength or laser line.

• High Transmission: The filter has excellent transmission of wavelengths outside the blocked region.

• Steep Cutoff Edges: Ensures sharp transition between blocked and transmitted wavelengths.

• Durable Coatings: Hard-coated dielectric layers provide long-term stability and resistance to environmental conditions.

Applications of Notch Filters

People can choose the filter according to the applications:

• Raman Spectroscopy – Blocks Rayleigh scattered light while transmitting Raman signals for precise measurements.

• Laser Systems – Suppresses specific laser lines to protect detectors and improve signal clarity.

• Fluorescence Microscopy – Eliminates background laser excitation light for high-contrast imaging.

• Telecommunications – Used in wavelength-division multiplexing (WDM) systems to manage specific wavelengths.

• Biomedical Imaging & Diagnostics – Provides wavelength selectivity for advanced optical detection.

 

Chenyu optical notch filters feature high optical density (OD) in the blocked region, excellent transmission outside the notch, and superior durability compared to conventional filters.

They are available in various central wavelengths to meet different laser and spectroscopy system requirements.

If you have any questions, please contact us or view our other filters.