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1064.4/2nm Ultra Narrow Bandpass Filter
1064.4/2 nm Ultra Narrow Bandpass Filter is a high precision optical filter. Coligh manufactures bandwidth narrow to 0.2nm ultra narrow bandpass filter.
- Central wavelength 1064.4nm
- Bandwidth is extremely narrow 2nm
- Extremely high transmittance >90%
- Cut-off depth OD7 or above
- Using fused silica substrate, suitable for laser use
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1064.4/2nm Ultra Narrow Bandpass Filter Description
The 1064.4/2nm Ultra Narrow Bandpass Filter produced by Coligh has a central wavelength of 1064.4nm and can be used with 1064nmNd:YAG lasers.
- It has an extremely narrow half-bandwidth of 2nm and can effectively cut off light outside the passband.
- It has extremely high transmittance near 1064.4nm, with an average transmittance of >93%. It also has an extremely deep cutoff depth of 400-700nm@OD>7, 700-1060nm@OD>5 1070nm-1500nm@OD>5.
- This extremely deep cutoff depth can effectively filter out background light and stray light, forming an excellent signal-to-noise ratio and contrast.
- We use fused quartz as the substrate, coupled with interference multilayer dielectric film, which has the characteristics of anti-laser damage and is also suitable for laser systems.
1064.4/2nm Ultra Narrow Bandpass Filter Technical Datasheet
| Parameter | Specification |
| Center Wavelength | 1064.4 nm ±0.2 nm |
| FWHM | 2 nm ±0.3 nm |
| Transmission Peak | >=90% |
| Blocking depth | 400-700m@OD>7 800-1060nm@OD>5 1070-1500nm@OD>5 |
| AOI | 0° or custom |
| Substrate | Fused Silica |
| Surface Quality | 60/40 40/20（MIL-PRF-13830B） |
| Coating Type | Hard Coating |
| Clear Aperture | >90% of diameter |
| Regular size | Dia10mm, Dia12.5mm, Dia25.4mm, Dia50.8mm or custom |
1064.4/2nm Ultra Narrow Bandpass Filter Applications
1064.4/2nm Ultra Narrow Bandpass Filter is commonly used in the following industries due to its high precision and narrow bandpass characteristics:
- Raman spectrometer
In Raman spectrometer, it is used to separate Raman signals and laser excitation light, suppress Rayleigh scattering of excitation light, and only allow Stokes/anti-Stokes signals to pass. - Medical fluorescence instrument
In medical instruments, the cutoff depth of this filter can be OD>7 in the visible light band, which can block excitation light and replenish weak fluorescence signals in the near-infrared region - Fiber optic communication
In optical communication, 1064nm filters can be used in optical communication wavelength division multiplexing (WDM) to isolate 1064nm channels and reduce crosstalk between adjacent bands.
