THz Low Pass Filters

Download THz Low Pass Filters Datasheet (PDF, 1175 KB)

Chapter 1. Composite Terahertz Low Pass Filters

We supply terahertz low pass filters intended to transmit terahertz radiation and block shorter wavelengths. The first group includes filters made from various materials set in  holder with a fit ring. Operation principle of the filters is based on redistribution of radiation by means of dispersion, reflection, scattering, diffusion, diffraction and interference.

Applications:

•  THz spectroscopy;
•  Imaging;
•  THz testing devices;
•  Astronomy and astrophysics;
•  Materials research;
•  Sensors and detectors;
•  Electro-optic research.

Features:

• Performance in wavelength range from IR to mm;
• High transmittance in pass band;
• Low transmittance  (<0.1%) in stop band;
• Mounted in holders.

Designation and parameters of the composite THz low pass filters:

The spectra of the composite THz low pass filters are shown in fig. 1.

Fig. 1. The transmittance spectra of the composite THz low pass filters.

Dimensions and shapes
Round filters with clear aperture/outer diameter of 24/31 mm, 35/44 mm and 47/60 mm are available from stock.

Chapter 2. Ceramic Plate Terahertz Low Pass Filters
The second group of the terahertz low pass filters developed by Tydex includes a line of units comprised of monolithic plates of various ceramic materials. These filters can be used with or without holders. The cutting frequency of these plates is defined at transmittance level of 1%. The filter designation includes the corresponding frequency in THz.
Maximum dimensions of terahertz low pass filters can be specified on request. Some filters can withstand extreme temperatures. For example, the filter designated LPFK20.9 can operate at extremely low temperatures, making possible to use it in nitrogen and helium cryostats, as well as in space.

Designation and parameters of the ceramic THz Low Pass filters:

The spectra of the ceramic THz low pass filters are shown in fig. 2.

Fig. 2. The transmittance spectra of the ceramic plate-based THz low pass filters.

Physical properties of the ceramics and maximum dimensions of the filters can be clarified on request.

Customer-specified filters may be manufactured on request.

For price quotation and delivery please fill in our Request Form.