TOPTICA Photonics AG - A passion for precision -

Terahertz Systems

Optoelectronic Terahertz-Generation

TOPTICA provides complete systems and components for both time-domain and frequency-domain terahertz generation. For time-domain applications, the TeraFlash sets new standards in terms of dynamic range, bandwidth and measurement speed. Combining TOPTICA’s FemtoFiber smart laser technology with state-of-the-art InGaAs antennas, the system achieves a peak dynamic range of more than 90 dB and a bandwidth  greater than 5 THz.  

For researchers working with GaAs-based photoconductive switches or with organic-crystal emitters, TOPTICA offers a variety of ultrafast fiber lasers, all of which come with superior specifications. Owing to the use of robust saturable absorber mirror technology for mode-locking, all lasers offer turnkey operation and do not require any mechanical alignment.

For frequency-domain terahertz spectroscopy, TOPTICA offers two "TopSeller" systems – TeraScan 1550 and TeraScan 780. Based on precisely tunable DFB lasers, digital control electronics, and latest GaAs and InGaAs photomixer technology, the TeraScan systems combine ease of use with best-in-class specifications.

A set of modular product packages extends the cw-terahertz product portfolio: The Tuning Range Extension pushes the useable bandwidth out to almost 3 THz, and the Phase Modulation Extension features two fiber stretchers for fast and accurate scanning of the terahertz phase. The packages can be combined and upgraded depending on the requirements of the experiment.

Selected accessories – Schottky diodes and optomechanics – are available for both time-domain and frequency-domain systems.

Frequency-Domain Terahertz

TeraScanFrequency-domain terahertz platform with megahertz-level frequency resolution
TeraBeamDual-color DFB lasers with digital driver electronics and precise frequency control
Tuning Range ExtensionAdditional diode laser, increases the useable bandwidth beyond 2 THz
Phase Modulation ExtensionResolution booster – phase and amplitude information with single-MHz resolution
PhotomixersTop-quality photomixers for cw-terahertz generation, with SM/PM fiber pigtail




Time-Domain Terahertz

TeraFlashTime-domain terahertz system with > 5 THz bandwidth
TeraFlash smartHigh-speed time-domain terahertz platform
Photoconductive SwitchesBroadband antennas for pulsed terahertz generation, with Si lens and fiber pigtail
FemtoFErb 1560 FD6.5Compact and cost-effective fs fiber laser, available at 1.5 µm and 780 nm
FemtoFiber pro IRHigh-power femtosecond fiber laser, emission wavelength 1.5 µm
FemtoFiber pro NIRFrequency-doubled femtosecond fiber laser, emission wavelength 780 nm
FemtoFiber pro IRS-IIFemtosecond fiber laser with shortest pulses, < 40 fs





OptomechanicsOptics for terahertz transmission or reflection measurements
Schottky Receivers
Zero-bias Schottky diodes for terahertz imaging