fs Packages: Hands-Off Fiber Lasers for Time Domain Terahertz
The FemtoFiber pro series offers femtosecond laser sources in a truly turn-key assembly. Based on reliable telecom components, these ultrafast fiber lasers provide a cost-effective alternative to bulky and expensive Ti:Sapphire systems.
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.
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 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.
| Recommended laser system | |
|---|---|
| Terahertz applications at 1560 nm | |
| Laser system | FemtoFiber pro IR |
| Wavelength | 1560 nm ± 30 nm |
| Pulse duration | < 100 fs |
| Repetition frequency | 80 MHz |
| Average power | > 350 mW |
| Terahertz applications at 780 nm or 1560 nm (simply switchable by user) | |
| Laser system | FemtoFiber pro NIR |
| Wavelength | 1560 nm ± 30 nm / 780 nm ± 5 nm |
| Pulse duration | < 100 fs |
| Repetition frequency | 80 MHz |
| Average power | > 350 mW @ 1560 nm / > 140 mW @ 780 nm |
| Key features | |
| 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 | |
