Key words:


TopSeller systems for cw-THz spectroscopy

  • Includes cutting-edge GaAs or InGaAs photomixers
  • Highest dynamic range: TeraScan 1550
  • Highest scan range: TeraScan 780
  • Digital control electronics DLC Smart

TOPTICA’s TeraScan platforms are well-established “TopSeller” configurations for frequency-domain terahertz spectroscopy. The systems combine mature DFB diode lasers with state-of-the-art GaAs or InGaAs photomixers. The TeraScan 780 offers an outstanding bandwidth, and the TeraScan 1550 sets new benchmarks in terms of terahertz power and dynamic range. Both systems feature TOPTICA's proprietary “DLC smart” control electronics.

Specification TeraScan 780 TeraScan 1550
Difference Frequency Tuning 1.8 THz (2.0 THz typ.) 1.2 THz (up to 2.7 THz with Tuning Range Extension)
Terahertz dynamic range
(300 ms integration time)
80 dB @ 100 GHz
70 dB @ 500 GHz
90 dB @ 100 GHz
70 dB @ 500 GHz
Minimum frequency step size < 10 MHz
Tuning Speed Up to 100 GHz / sec
Frequency accuracy < 2 GHz
Terahertz emitter PCA-FD-0780-100-TX- , GaAs photomixer PCA-FD-1550-100-TX-1, InGaAs photodiode
Terahertz receiver PCA-FD-0780-130-RX-1, GaAs photomixer PCA-FD-1550-130-RX-1, InGaAs photomixer
Antenna type Log-spiral Bow-tie
Terahertz polarization Circular Linear
Emitter and receiver package Cylindrical, ∅ 1", Integrated Si lens and SM/PM, fiber pigtail Cylindrical, ∅ 25 mm, Integrated Si lens and SM/PM, fiber pigtail
Emitter and receiver bandwidth Approx. 3 THz 
Terahertz power (typ.) 2 µW @ 100 GHz, 0.3 µW @ 500 GHz 100 µW @ 100 GHz, 10 µW @ 500 GHz
Laser size and weight Two DFB pro L laser heads, each with dimensions 90 x 90 x 244 mm (H x W x D), 2,8 kg Two DFB pro BFY laser heads, each with dimensions 60 x 120 x 165 mm (H x W x D), 1 kg
Control unit DLC smart
Controller size (H x W x D) + weight 19" and 1 RU (H x W x D: 45 x 480 x 290 mm), 4 kg 
Computer interface Ethernet
Software Control software with GUI + Remote command interface 
Key advantages High bandwidth with one set of lasers High terahertz power, compact laser unit