A UV laser head (266 nm) generates >1mW average output power at 80 MHz repetition rate with <80 ps pulse width.

The picosecond pulsed laser diode heads of the LDH-FA Series are based on a Master Oscillator Fiber Amplifier (MOFA) concept with optional frequency conversion. The master oscillator generates infrared picosecond pulses with variable repetition rates up to 80 MHz using the proven gain-switching techniques from PicoQuant. The output of this seed laser is directly connected to a single or double stage fiber amplifier, which boosts the output from the seed laser by several dB while maintaining the other characteristics of the seed laser beam like e.g. the emission wavelength, polarization and the short pulse width.

The high pulse energies of the amplified infrared lasers permit an efficient wavelength conversion using, for example, single pass second harmonic generation (SHG) or even fourth harmonic generation (FHG). In that way it is for the first time possible to generate picosecond pulses at 266 nm, 531 nm or 766 nm with adjustable repetition rates up to 80 MHz and pulse widths below 100 ps (FWHM).

The laser heads are available in two versions that either emit from a polarization maintaining single mode fiber with FC/APC fiber connector or generate a collimated output beam. The fiber coupled version is available at 531 nm and can generate up to 2 mW average output power at 40 MHz repetition rate. The laser heads with collimated output are available at 266 nm, 531 nm, 766 nm, 1062 nm and 1532 nm. The achievable average power levels of these laser heads depend on the number of amplification stages and the efficiency of the optional frequency conversion stage and can reach more than 1000 mW for the 1532 nm laser at 80 MHz repetition rate.

All laser heads can be driven by the PDL 828 'Sepia II', the PDL 808 'Sepia', the PDL 800-D or the PDL 800-B.

Scheme of the LDH-FA Series. An infrared picosecond pulsed diode laser acts as a seed laser for a fiber amplifier. The amplified output can then be optionally converted to e.g. green picosecond pulses. The laser heads emit either a collimated beam or from a PM fiber with FC/APC fiber connector.