FWHM 0.3nm Ultra-narrow Band Filter
Ultra-narrowband filters have wide applications in narrow-linewidth lasers, Raman spectrometers, fluorescence microscopes, ultrafast spectroscopy, attosecond lasers, fiber optic communication networks, aerospace, and other fields.
Borisun uses ion beam sputtering and magnetron sputtering technologies to produce ultra-narrowband optical filters. Currently, we can manufacture flat-top and Gaussian filters with a half-width at half-maximum (FWHM) of 0.3 nm in the near-infrared band and 1 nm in the visible light band.
Center Wavelength Uniformity and Processing Capability:
The best center wavelength uniformity level is +/-0.1nm.
Filters with a full width at half maximum (FWHM) of 0.3nm can be processed in the 400-1700nm range.
The Difference Between flat-top and Gaussian Filters:
From a filter fabrication perspective: flat-top filters are more difficult to manufacture.
From a filter performance perspective: flat-top filters can achieve higher power output from the same power light source in the target center band, while also producing cleaner output light with less stray light interference.
Processing Cycle:
Customized products have a processing cycle of 3-4 weeks.
Important Notes:
Blue Shift of Filters. For customers using laser filtering, filters generally exhibit a blue shift phenomenon. This means that when light enters the filter from a larger incident angle, the center wavelength of the filter will shift towards a shorter wavelength. Therefore, customers using narrow-linewidth lasers should set the center wavelength of the filter to be approximately 0.5 nm longer than the original center wavelength. This is more appropriate because adjusting the incident angle of the filter will only shift the center wavelength to the left, not to the right.
Manufacturing Process:
The customer provides the center wavelength, half-width at half-maximum (HWHM), cutoff band ranges on both sides, filter size requirements, and thickness requirements
Our company simulates the filter’s spectral data according to the customer’s specifications.
The customer confirms the specifications.
Our company manufactures the filter and arranges for shipment.
Completed Projects (please contact the sales team for detailed data):
355nm-FWHM 2.5nm (Gaussian type)
532nm-FWHM 0.5nm (Gaussian type)
561nm-FWHM 3.5nm (Gaussian type)
634-FWHM 1nm (Gaussian type)
634-FWHM 1nm (Flat-top type)
660-FWHM 3nm (Flat-top type)
780-FWHM 0.3nm (Flat-top type)
795.1-FWHM 1nm (Flat-top type)
905-FWHM 1nm (Flat-top type)
920-FWHM 1nm (Flat-top type)
1030-FWHM 1nm (Flat-top type)
1030-FWHM 0.3nm (flat-top type)
1064.3-FWHM 1.2nm (flat-top type)
1064.5-FWHM 1nm (flat-top type)
1064.5-FWHM 0.5nm (flat-top type)
1064.5-FWHM 0.3nm (flat-top type)
1270-FWHM 0.3nm (flat-top type)
1550-FWHM 0.7nm (flat-top type)
1560-FWHM 0.3nm (flat-top type)
1573.4-FWHM 2.5nm (flat-top type)
ABOUT BORISUN
Hanzhong Brisun Optics Co., Ltd. Is the high precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.
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