High-speed Terahertz Spectrometer
Advanced Features and Benefits
- NEW: Remote control and data transfer over network
- Fast scanning without optomechanical delay unit
- All-PM fiber laser technology with instantaneous mode locking, for highest stability and reliability
|Spectral range||>3 THz in step mode, >1 THz in rapid mode|
|Dynamic range||>60 dB in step mode, >35 dB in rapid mode|
|Total scan range||up to 4 ns (pulse-to-pulse, virtually unlimited)|
|Rapid scan range||up to 40 ps|
|Rapid scan rate||>200 waveforms / s|
|THz frequency resolution||<3 GHz|
|Scan mode||rapid / step scan|
|Total average output power||>60 mW|
|Repetition rate||250 MHz|
|Output port configuration||2 x fiber coupled FC/APC ports, PM fiber|
|Pulse duration||<90 fs directly from laser, <120 fs after OSCAT delay line|
|Dimensions / weight|
|Optical unit||450 x 560 x 200 mm³ / 34 kg|
|THz control electronics||448 x 132 x 550 mm3 / 10 kg|
*depending on measurement settings
Our new TERA OSCAT all fiber Terahertz spectrometer for fast data acquisition is based on the novel OSCAT (Optical Sampling by CAvity Tuning) technique. It enables THz time-domain spectroscopy without any external delay line. Similar to the ASOPS technique, the OSCAT offers the capability of high-speed imaging measurements and great flexibility of the system configuration.
The OSCAT principle makes use of a varying laser repetition rate and two differently long output fibers, introducing a variable delay between the femtosecond pulses arriving at the THz emitter and the receiver antenna. The scanning through repetition rate variation eliminates constraints of the conventional mechanical delay lines. The apparatus is designed to be user friendly and nearly alignment-free, enabling quick changing between transmission and reflection measurement geometry.
With its two modes of operation, TERA OSCAT is a versatile tool for high-resolution and for high-speed data acquisition applications. The high-resolution operation mode offers a high signal dynamic range for THz broadband spectroscopy. Operation in the high-speed mode enables unprecedented fast THz measurements, and is ideally suited for THz imaging applications or measurements of samples in a pulsed field.
It has been shown that Terahertz technology is capable of inline and non-destructive material inspection in polymer industry. Industrial environment includes strongly varying temperature, humidity and acoustic vibrations.
- femtosecond Er-doped fiber oscillator with 250 MHz repetition rate
- THz path with fiber coupled emitter and receiver modules and broadband polymer THz optics
- OSCAT electronics based on our SYNCRO platform for laser repetition rate control
- PC with data acquisition platform and evaluation software
Timing jitter of the OSCAT laser:
Rapid scan THz trace: