Tuning Range Extension
Tuning range extensions for frequency-domain terahertz systems
• Third laser head – access to higher frequencies
• Exploits full bandwidth of InGaAs photomixers
• Tuning range up to 2.0 THz or 2.7 THz
• Frequency calibration for each 2-laser subset
• Requires TeraScan 1550 or TeraBeam 1550
TOPTICA is been able to push the frequency limits of frequency-domain spectrometers. Whilst one DFB laser at 1.5 µm offers a tuning range of approximately 600 GHz, a combination of three lasers covers the entire range from DC to 2.0 THz, or – using more elaborate combinations – even up to 2.7 THz. TOPTICA’s “Tuning Range Extension” thus provides access to frequencies that used to be beyond reach with commercial frequency-domain spectrometers.
Applications
• Plastic Inspection
• Paint and coating layers
• Paper quality control
• Hydration monitoring
• Communication
• Ultrafast dynamics
• Gas sensing
• Fundamental physics
Specifications
Specifications THz Tuning Extension 2.0 THz Tuning Extension 2.7 Base system
TeraBeam 1550 (λ1 = 1533 nm, λ2= 1538 nm)
3rd laser
λ3 = 1550 nm
Difference frequency tuning
0 - 2.0 THz
0 - 1.2 THz with lasers #1 and #2 ("TeraBeam")
0.9 - 2.0 THz with lasers #2 and #3
0 - 2.7 THz
0 - 1.2 THz with lasers #1 and #2 ("TeraBeam")
0.9 - 2.0 THz with lasers #2 and #3
1.5 - 2.7 THz with lasers #1 and #3
Laser power
See TeraBeam 1550
Tuning speed
See TeraBeam 1550
Frequency accuracy
See TeraBeam 1550
Laser size (H x W x D) and weight
60 x 120 x 165 mm, 1 kg
Laser diode warranty
5000 hrs or 2 years (whatever comes first)