Schematic of TeraScan (red) with Tuning Range Extension (yellow).
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.
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Specification
Specifications THz Tuning Extension 2.0 THz Tuning Extension 2.7 Base system TeraBeam 1550 (λ1 = 1550 nm, λ2= 1545 nm) 3rd laser λ3 = 1533 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
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