PicoQuant offers specially designed diode laser system as seeding sources for Erbium or Ytterbium doped fiber lasers or amplifiers. The laser systems are build around a common control unit of the PDL Series and different laser heads emitting at 1030 nm, 1064 nm, or 1530 nm. Different pulse shapes and pulse patterns can be generated with different driving electronics:
- picosecond pulses at variable and adjustable repetition rates up to 80 MHz with constant pulse energy
- fast switched lasers with nanosecond pulses with variable pulse length
- nanosecond pulses with programmable pulse shapes
All laser systems deliver either a collimated output or emit from a FC/APC fiber connector. Compact OEM units are available upon special request.
The image shows a measured pulse profile and spectrum of a seed laser at 1063 nm. The measured pulse energy is 16 pJ and the measured pulse width is 39 ps (FWHM).
Compensation of amplifier saturation
Programmable pulse shapes can be used to compensate for saturation effects of fiber amplifiers, which exihibts strong gain-saturation especially in nanosecond pulse regime.The example shows the output of a fibre amplifier with and without compensation by pulse shaping of the seed pulse using the PPL 400 as a seed laser.