THz High Pass Filters
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Download THz High Pass Filters Datasheet (PDF, 1,5 MB) |
THz High pass filters (HPF) are designed to block lower frequencies and allow only high terahertz frequencies to pass. The filters are made from metal plates with subwavelength diameter holes. The plates are mounted in holders with fit rings. The micro-sized holes in the filters act as waveguides with reject frequency determined by the hole geometry.
Applications:
• THz spectroscopy;
• THz diagnostic instruments;
• Astronomy and astrophysical applications, including space-based;
• Materials research;
• Sensors and detectors;
• Нigh harmonics extraction from the radiation of a free electron THz laser;
• Shielding coating.
Key properties:
• High transmittance of pass band;
• Low transmittance (<0.1%) in stop band;
• Cutting frequency up to 0.5 THz;
• Mounted in holders.
Part Number Designation for TYDEX high-frequency filters: HPF <frequency, THz>-<aperture, mm> Tydex
Characteristics and spectral curves of several filters can be found below:
| Part Number | Cutting frequency, THz | Max transmittance of pass band, % | Transmittance 1 octave away from cutting frequency, % |
| HPF0.34-12.7 | 0.34 | no less than 99 | no less than 44 |
| HPF0.5-12.7 | 0.5 | no less than 88 | no less than 30 |
Sizes and shapes
The filters with cutting frequencies of 0.1, 0.2, 0.3, 0.4, 0.5 THz and with apertures/outer diameters 12.7/31, 24/31, 35/44, 47/60 mm are available.
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