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Terahertz waveplate (THz waveplate)
Product Introduction
Polarization measurement techniques are essential in terahertz (THz) radiation analysis, enabling characterization of properties such as birefringence, spatial/frequency modes, and profiles. The core component is a polarization analyzer capable of identifying and measuring polarization states.
The THz waveguide developed by Tydex is fabricated from birefringent materials and primarily serves to alter the polarization state of THz radiation. Its operating principle involves adjusting the phase difference between the vertical and horizontal polarization components of the incident light to achieve polarization state conversion.
These wave plates are primarily classified into two types: λ/2 wave plates (half-wave plates) and λ/4 wave plates (quarter-wave terahertz wave plates). A λ/2 terahertz wave plate provides a phase delay of π, altering the polarization direction of incident linearly polarized light; a λ/4 wave plate offers a phase delay of π/2, converting incident linearly polarized light into circularly or elliptically polarized light. When the polarization direction of the incident light aligns with the axis of the wave plate, the terahertz wave plate does not modify its polarization state.
Principle of λ/2 terahertz wave plates Principle of λ/4 terahertz waveguide plates
Parameter Specifications:
Material | THz grade crystal quartz |
Direction | X-cut |
Error in line | ± arc.min 10 |
Dimension error | ± 0.25mm |
Clear aperture | ≥ 90% |
Depth of parallelism | arc.min 5 |
Surface quality | scr/dig 60/40 |
Total wave distortionTWD,λ@633nm | 1/2 |
Wave Pattern Type | 1/2、1/4、1/2&1/4 segmented wave plates (for radially polarized light) |
Regular size | 20×20mm 、50×50mm 、25.4mm、50.8mm(50mm) |
Maximum dimensions | 60×60mm |
Segmented terahertz waveguide
The terahertz segmented waveguide consists of several half-wave plates, enabling the generation of both radial and azimuthal polarized light.
Physical image of a terahertz waveguide plate
