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n	Download THz Beam nSplitters Datasheet (PDF, 46 KB)

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We offer THz beam splitters of 2 types:
- single-pass beam nsplitter. It is used in optical schemes where radiation passes through beam nsplitter one time;
- multi-pass beam splitter for interferometer scheme where nbeam passes throughsplitter several times.

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The material of THz beam splitter is HRFZ-Si. These beam nsplitters provide transmittance/reflectance ratio about 54/46 (%) in the wide nwavelength range without any coating.
Reflection and transmission curves are nshown below.

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Fig.1 HRFZ-Si transmission and reflection (sample thickness n- 5 mm).

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1. Single-pass THz Beam Splitter 
The nspecification for the single-pass beam splitter is the same as for a HRFZ-Si nwindow. In fact plano-plano HRFZ-Si window could be used as single-pass beam nsplitter.

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Commom specification:

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nnnnnnnnnnnnnnnnnnnnnnnnnnnnn Material HRFZ-Si Type plano-plano Available sizes, mm to 150 Diameter or ncross-cut tolerance,mm +0.0 /-0.1 Thickness tolerance, mm  +/0.1 Clear apperture, % >=90 Parallelism, arc. min 3 Surface quality (two-sided npolishing), scr/dig 60/40 Surface accuracy, mm +/-0.01 deviation from ideal nplane

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The finished parts of different dimensions are available nfrom stock and supplied within a week.
Please check the Optics stock. n
Custom sizes are manufactured upon request.
For price quotation and ndelivery please fill in our Request nform. 

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2. Multi-pass THz Beam Splitter n
The multi-pass beam splitter (for interferometers) as opposed to a nsingle-pass beam splitter should be produced with a high accuracy.

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Commom specification:

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nnnnnnnnnnnnnnnnnnnnnnnnnnnnn Material HRFZ-Si Type plano-plano Available sizes, mm to 150 Diameter or ncross-cut tolerance,mm +0.0 /-0.1 Thickness tolerance, mm  +/-0.01 Clear apperture, % >=90 Parallelism, arc. sec 5 Surface quality (two-sided npolishing), scr/dig 60/40 Surface accuracy, ??633 nnm 1

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The following multi-pass THz beam splitters are available from nstock:

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nnnnnnnnnnnnnnnnn No. Diameter Thickness mm mm 1 40x30 3.5 2 50.8 3.5