TeraFlash pro

Versatile time-domain terahertz platform

100 dB peak dynamic range, > 6 THz bandwidth
Variable terahertz path length between 15 cm and 110 cm
Fast shaker – 60 traces/s @ 50 ps
New: “Dual” version for 2 emitter/receiver pairs

The TeraFlash pro, a table-top time-domain terahertz platform, sets new standards in terms of dynamic range, bandwidth and measurement speed. By means of a highly to an advanced laser design and progress in photoconductive antennas, the system now achieves a peak dynamic range of 100 dB, and a bandwidth of more than 6 THz. Owing to a highly precise mechanical delay stage, the system acquires 60 traces/s @ 50 ps scan range, or 95 traces/s @ 20 ps. The new “Dual” version enables simultaneous operation of two emitters and/or two receivers.

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Specification

Specifications	TeraFlash pro	TeraFlash pro / Dual
Spectral range	0.1 – 6 THz	0.1 – 6 THz (typ. 6.5 THz)
Spectral peak dynamic range	95 dB	100 dB
Useable terahertz path length	15 – 110 cm, adjustable via software (stationary delay)

Additional Information

Schematic diagram of the TeraFlash pro. Blue lines depict electric signals, red lines the optical signals.

Terahertz spectrum of air with vapor lines, measured with the TeraFlash pro. Within a measurement time of less than half a minute, the bandwidth reaches 6 THz and the peak dynamic range exceeds 95 dB - an industry record!

Peak dynamic range versus the number of averaged time traces (lower abscissa) and total acquisition time (upper abscissa).
Applications
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- Product Info
- Product Brochure Terahertz Systems
Literature
- Overview Article: Lang, M., et al., Laser-based terahertz generation & applications, Photonik International (2012)
- Scientific Paper: Vieweg et al., Terahertz-time domain spectrometer with 90 dB peak dynamic range, J Infrared Milli Terahz Waves, 2014
- Scientific Paper: F. Rettich et al., Field intensity detection of individual terahertz pulses at 80 MHz repetition rate; J Infrared Milli. Terahz. Waves (2015)
- Conference Abstract: Yahyapour et al., Non-Contact Thickness Measurements with Terahertz Pulses, WCNDT 2016
- Review paper: Naftaly, M., et al., Industrial applications of terahertz sensing: State of play, Sensors (2019)
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Components	One femtosecond laser SM/PM fiber delivery 2 mechanical delay stages (stationary / moving) 2 InGaAs photoconductive switches Electronics for data acquisition	One femtosecond laser SM/PM fiber delivery 2 mechanical delay stages (stationary / moving) 2 (optionally 4) InGaAs photoconductive switches Electronics for data acquisition
Laser wavelength	1560 nm
Laser pulse width	typ. 80 fs
External fiber length	2.5 m (other lengths u.r.)
Terahertz emitter	PCA-TD-250-TX-1: InGaAs/InP photoconductive switch with strip-line antenna, 2.5 m fiber pigtail
Terahertz receiver	PCA-TD-250-TX-1: InGaAs/InP photoconductive switch with dipole antenna, 2.5 m fiber pigtail
Antenna package	Cylindrical, ∅ 25 mm, integrated Si lens and SM/PM fiber pigtail
Number of channels (antenna pairs)	1	2
Scan range	5 .. 2500 ps, software-controlled
Scan speed	166 traces/s (5 ps) 95 traces/s (20 ps) 60 traces/s (50 ps) 6 traces/s (200 ps) Intermediate settings possible
Average terahertz power	typ. 70 µW
Time-domain dynamic range	100 dB
Useable terahertz path length	15 – 110 cm, adjustable via software (stationary delay)
Frequency resolution @ max. scan range	0.4 GHz
Computer interface	Ethernet
Computer software	LabView-based GUI, included
Size (H x W x D)	180 x 450 x 560 mm³
System weight	20 kg
Operating voltage	110 / 220 V AC
Accessories	Transmission optomechanics, Reflection head, Imaging extension