THz Attenuators
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Download THz Attenuators Datasheet (PDF, 73 KB) |
Tydex offers a set of THz attenuators for attenuation of high-power THz radiation.
The variable wheel attenuator consists of 5 wheels. Four wheels contain metalized wedged silicon wafers with different attenuation levels and one wheel is empty. If necessary the empty wheel can be filled with a custom element (e.g. filter). Four attenuators have transmission 30%, 10%, 3%, and 1%. These attenuator elements can be used as a single attenuator or in combination that allows achieving different levels of attenuation.
Transmission curves (noise is smoothed) of attenuator elements are shown below. Measurements were made up to 1000 μm. However, operating wavelength range is much wider. It follows from physical mechanism of attenuator operation.
Fig. 1. Transmission of THz attenuator elements.
Transmission values of different combinations of attenuators are given in the table below.
| Combination of attenuator elements | Normal value of tranmission, % |
| 30+10 | 3 |
| 30+3 | 0.9 |
| 30+1 | 0.3 |
| 10+3 | 0.3 |
| 10+1 | 0.1 |
| 3+1 | 0.03 |
| 30+10+3 | 0.09 |
| 30+10+1 | 0.03 |
| 10+3+1 | 0.003 |
| 30+3+1 | 0.009 |
| 30+10+3+1 | 0.0009 |
Common specification:
| Operating wavelenth range, μm | 40 ÷ >1000 |
| Quantity of wheels in the mount, pcs. | 5 |
| Quantity of attenuation grades, pcs. | 4 |
| Transmission tolerance of attenuator element, % of nominal value |
+/- 10 |
| Damage threshold, W/cm2 | several hundreds |
The following THz attenuators are available from stock:
| No. | Clear aperture, mm |
| 1 | 25.4 |
| 2 | 50.8 |
Please check our Optics stock.
Attenuator elements can be supplied in wheel mount as well as without it.
Different clear apertures (up to 54.5 mm) attenuators are manufactured upon request.
The mount design of custom-made attenuators is discussed additionally.
For price quotation and delivery please fill in our Request form.
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