Phase Modulation Extension
Phase modulation for TeraScan or TeraBeam
• Resolution booster
• Phase and amplitude information at any frequency
• Enhanced thermal stability due to dual-fiber concept
• Path length modulation up to 3 mm @ 1 kHz
• Requires TeraScan or TeraBeam
cw terahertz spectroscopy based on photomixing offers the attractive feature of detecting both amplitude and phase of the terahertz wave. Determining the phase requires a modulation of the optical path length, or the terahertz frequency. The Phase Modulation Package offers a particularly fast and accurate technique to scan the terahertz phase, by using a symmetric setup with two fiber stretchers wound around piezo actuators. Users can thus retrieve full information on phase and amplitude of the terahertz wave - with single-Megahertz resolution!
Applications
Plastic Inspection
Paint and coating layers
Paper quality control
Hydration monitoring
Communication
Ultrafast dynamics
Gas sensing
Fundamental physics
Specifications
Specifications THz Phase Mod / NIR THz Phase Mode / IR Concept
Twin fiber stretcher with piezo actuators
Wavelength
780 nm, as defined by TeraScan 780 /
TeraBeam 780
1.5 µm, as defined by TeraScan 1550 / TeraBeam 1550
Difference frequency tuning
See TeraScan / TeraBeam systems
Difference frequency resolution
See TeraScan / TeraBeam systems
Complete amplitude + phase information available at maximum resolution.Fibers
2 x 60 m, SM/PM fibers
Max. path length
3 mm @ 1 kHz
HV amplifier
Included
Software
Included, part of control programm