Ondax manufactures optical filters with edges that are 10 times steeper than the so called razorsharp edges of the best dielectric raman filters. Ondax also integrates the volume holographic filters into diode laser in order to stabilize the wavelength narrowing the linewidth to typically <100MHz.
The NoiseBlock™ ASE (Amplified Spontaneous Emission) Suppression filters suppress the broad spectrum of spontaneous emission that commonly occurs in laser diodes to provide a pure, ASE-free, single frequency laser.
Adding a NoiseBlock™ ASE filter to a single frequency wavelength stabilized laser effectively reduces broadband spectral ASE background to more than 70dB below the laser line while transmitting 90% of the single frequency line. The filter’s narrow spectral profile (HWHM <10cm-1) is designed to match the SureBlock™ Ultra Narrow-band Notch Filter, making it ideal for enabling ultra-low frequency (low wavenumber) Raman spectroscopy with high signal-to-noise.
Download: Noise Block ASE Filter Data Sheet
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