Femto Easy, ultrafast instrumentation

Nano4th frequency converter

Frequency converters allows you to generate various wavelengths from your laser source. Different techniques can be used to convert frequencies, for example doubling using a non linear crystal.

Nano4th is an ultra compact platform that converts your femtosecond low-energy IR laser pulses (nJ-range) into 2nd and 4th harmonics with best-in-class conversion efficiency. Its industrial-grade design, makes it a robust and reliable solution that will extend the capabilities of your laser. The design is easily adaptable to higher pulse energies, up to μJ or mJ level.


  • Ultra compact, industrial-grade platform : sealed, nitrogen purged
  • High conversion efficiency of low-energy pulses (nJ level)
  • Wavelength change from 3 outputs, within seconds : fundamental, 2nd and 4th harmonics
  • All-in-one design. Laser and conversion unit are combined into one single robust assembly
  • Alignment free. No software needed


Nano4th output 1064 nm 532 nm 266 nm
Power 2 W 1 W 1 750 mW 1 170 mW
Repetition rate 80 MHz
Conversion efficiency n/a > 45% > 35% > 8%
Pulse duration < 120 fs < 120 fs < 65 fs < 60 fs (estimated)
Polarization vertical horizontal vertical

1 Laser operation mode can be switched between long/short pulse, leading to two different output power at 532 nm.
This table shows an example of typical performance for a specific laser. For a different laser type and/or different specifications, the Nano4th will be adapted by our team for best conversion efficiency.


You can use Nano4th frequency conversion module with any laser with 1030 - 1064 wavelength, nanojoule energy and megahertz repetition rate. We also can provide breadboards for an easier integration, for exemple to use with Alcor 1064 lasers from Spark Lasers.