TOPAS Prime Input Requirements1

Input Wavelength 770-830 nm
Pulse Energy2, 3 0.15-6.0 mJ
Pulse Width, FWHM4 20-60 fs 60-150 fs
Polarization Horizontal
Energy Stability ≤1% rms
Pulse-to-Pulse Stability ≤1%
Beam Divergence <1.5 x (diffraction limit)
Beam Height 120-185 mm from optical table
Beam Diameter (1/e²) <11 mm

TOPAS Prime Output Requirements1

Tuning Range TOPAS Prime-F
Output Energy 100 fs
Output Energy 35 fs
Signal: 1140-1600 nm >250 µJ (signal + idler at peak) >250 µJ (signal + idler at peak) Vertical
Idler: 1600-2600 nm Horizontal
SHS: 580-800 nm >80 µJ >30 µJ Horizontal
SHI: 800-1160 nm >50 µJ >20 µJ Vertical
SFI: 533-600 nm >50 µJ6 >30 µJ Vertical
SFS: 475-533 nm >70 µJ6 >40 µJ Vertical
FHS: 290-400 nm >15 µJ >5 µJ Horizontal
FHI: 400-480 nm >15 µJ >4 µJ Horizontal
SH of SFS: 240-266 nm >7 µJ >3 µJ Horizontal
SH of SFI: 266-295 nm >7 µJ >3 µJ Horizontal
Deep UV - FHS + Pump: 215-240 nm >3 µJ >1 µJ Vertical
Deep UV - SH of SFI + Pump: 200-215 nm >3 µJ >1 µJ Vertical
Deep UV - SH of SFS + Pump:
190-200 nm
>3 µJ >1 µJ Vertical
NDFG1K: 2600-4500 nm (100 fs)5 >8 µJ at 4000 nm; Horizontal
NDFG2K: 4000-18000 nm (100 fs)5 >4 µJ at 5000 nm;
>0.3 µJ at 15000 nm
NDFG1K: 2600-4500 nm (35 fs)5 >2 µJ at 4000 nm Horizontal
NDFG2K: 4000-15000 nm (35 fs)5 >1 µJ at 5000 nm;
>0.1 µJ at 13000 nm


  1. Due to our continuous product improvement program, specifications are subject to change without notice.
  2. TOPAS Prime energies scaled linearly with input energy. Energy above generated at 1 mJ input energy.
  3. 6 mJ input energy requires TOPAS Prime Plus configuration.
  4. For pulse widths >150 fs, contact Spectra-Physics.
  5. Collinear DFG available upon request.
  6. Optional fresh pump available.


Improved Optical Design

TOPAS Prime utilizes several key features to maximize utility and efficiency. In the visible range, the fresh pump option provides improved beam quality for more efficient sum-frequency conversion. The improved optical design accommodates a larger beam diameter, (~11 mm) which eliminates the need for an external telescope. When higher energy output is needed, the TOPAS Prime Plus can accept input energies up to 6 mJ.

Pump with Solstice Ace and Spitfire Ace Regenerative Amplifiers

The TOPAS Prime works best when pumped using the market leading Solstice Ace and Spitfire Ace regenerative amplifiers. Both amplifiers are equipped with the Spectra-Physics patented Ace regenerative amplifier cavity. This cavity utilizes a normal incidence rod design for an outstanding beam quality with minimal astigmatism. In addition, the Solstice Ace and Spitfire Ace provide market leading stability specifications making TOPAS Prime the perfect tool for performing ultrafast research.

Compatible Power Sensors

To verify and analyze the output power of your Topas Prime laser, we recommend the Ophir  30A-BB-18 (7Z02692) thermal power sensor and Centauri laser power meter.  Additional information on this laser measurement equipment can be found on the ophiropt.com website.  Other Ophir sensors and meters may also be suitable for the Topas Prime, depending on application. Ophir also works with laser system developers to achieve embedded beam diagnostics to monitor system performance as an OEM solution.