fs Packages: Hands-Off Fiber Lasers for Time Domain Terahertz
- Terahertz generation via optical rectification or photoconductive switches
- Hands-off, turnkey systems
- Saturable absorber mirror (SAM) technology for most reliable performance
- Polarization maintaining (PM) fiber assembly
- Optional: ECOPS technique replacing mechanical delay line
| FemtoFiber pro IR | FemtoFiber pro NIR | FemtoFErb 1560 | FemtoFiber pro IRS | |
|---|---|---|---|---|
| Wavelength | 1560 nm | 780 nm | 1560 nm | 1560 nm |
| Pulse duration | < 100 fs | < 100 fs | < 100 fs | < 40 fs (typ. 30 fs) |
| Average power | > 350 mW | > 140 mW | > 100 mW | > 180 mW (typ. 220 mW) |
| Output | Free space | Free space | SM/PM fiber | Free space |
| Repetition rate | 80 MHz | 80 MHz | 80 or 100 MHz | 80 MHz |
| For InGaAs antennae |  | - | | - |
| For GaAs antennae | - | | - | - |
| For organic crystals (DAST, OH1) | | - | | |
| Free-space coupling to antenna | | | | |
| Fiber-coupled antenna | - | - | | - |
| Comment | High power | High power | Budget laser | Ultra short pulse |
Both the fundamental wavelength at 1560 nm and the second harmonic at 780 nm are available from one unit. Pulse parameters are excellently suited for time domain terahertz applications: The average laser power is greater than 350 mW (1560 nm) or 140 mW (780 nm), and the pulse width remains well below 100 fs.
The FemtoFErb 1560 is ideally suited for time-resolved THz spectroscopy with InGaAs antennae and organic emitters (DAST, OH1). With a compact footprint including all electronics in one box and a robust hands-off design it is a solution OEM integration of time-domain terahertz. The FemtoFErb 1560 FD6 offers excellent pulse characteristics after several meters output fiber. This allows to replace complex beam delivery setups by flexible and convenient fiber solutions.
For detection of the terahertz pulse, TOPTICA offers a unique kit: Electronically controlled optical sampling (ECOPS) removes the need for a scanning optical delay line. The technique makes use of two FemtoFiber pro lasers, phase-locked to one another. One system thus generates the terahertz pulse, the other one is used for optical sampling – faster than other methods, and without loss of timing accuracy.
Download: ECOPS laser synchronization
