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Picosecond Pulsed Sources

LDH-FA Series

Amplified Picosecond Pulsed Laser Diode Heads

  • Available at 266, 355, 531, 560, 766, 1064, and 1532 nm
  • Pulse width down to 70 ps (FWHM)
  • Average output power between 1 mW and 450 mW (depending on wavelength)
  • Repetition rates up to 80 MHz
  • Collimated beam or PM fiber output with FC/APC fiber connector
  • NEW: 560 nm, < 70 ps (FWHM)

The Scheme of the LDH-FA Seriespicosecond 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 the emission wavelength, polarization and the short pulse width.

Conversion to UV, green or red

Pulse width of LDH-P-FA-355 measured with streak cameraThe high pulse energies of the amplified infrared lasers permit an efficient wavelength conversion using, for example, single pass second harmonic generation (SHG), third harmonic generation (THG) or even fourth harmonic generation (FHG). In that way it is for the first time possible to generate picosecond pulses at 266 nm, 355 nm, 531 nm, 560 nm, or 766 nm with adjustable repetition rates up to 80 MHz and pulse widths below 100 ps (FWHM). As an example, the pulse width (FWHM) of a LDH-P-FA-355 emitting at 355 nm has been determined as 47.4 ps by means of a streak camera measurement.

Measurement courtesy of Dr. Tobias Korn, A.G. Prof Dr Christian Schüller, University of Regensburg, Germany.

Average output power up to 1 W

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 or 1063 nm and can generate up to 2 mW (531 nm) or 25 mW (1063 nm) average output power at 40 MHz repetition rate. The laser heads with collimated output are available at 266 nm, 355 nm, 531 nm, 560 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 450 mW for the 1532 nm laser at 80 MHz repetition rate.

Repetition rate up to 80 MHz

All laser heads of the LDH-FA Series are designed to work at repetition rates between 1 MHz and 80 MHz. For the fiber coupled versions even repetition rates down to 10 kHz are possible. Driving signals with repetition rates in the MHz range are readily delivered by the PDL Series drivers.


(a) 266 nm/355 nm

Model LDH-P-FA-266 LDH-P-FA-355
Center wavelength 266 ± 3 nm 355 ± 3 nm
Pulse width (FWHM) < 80 ps < 80 ps
Average output power
at 40 MHz repetition rate
1 mW 3 mW
Average output power
at 80 MHz repetition rate
> 1 mW > 5 mW
Repetition rate 1 MHz to 80 MHz
freely adjustable
1 MHz to 80 MHz
freely adjustable
Spectral width << 1 nm << 1 nm
Output collimated beam* collimated beam*
PER > 20 dB > 20 dB
Power stability (12 hours)
(ΔT (ambient) < 0.5 K)
< 3 % rms < 3 % rms
Dimensions (l × w × h) 272.6 × 74 × 100 mm
(incl. clean-up filter)
272.6 × 74 × 100 mm
(incl. clean-up filter)

(b) 532 nm/560 nm

Model LDH-P-FA-530B LDH-P-FA-530L LDH-P-FA-530XL NEW
LDH-P-FA-560
Center wavelength 532 ± 3 nm 532 ± 3 nm 532 ± 3 nm 557 ± 3 nm
Pulse width (FWHM) < 100 ps < 100 ps < 100 ps < 70 ps
Average output power
at 40 MHz repetition rate
2 mW 20 mW 100 mW 3 mW
Average output power
at 80 MHz repetition rate
> 4 mW > 20 mW > 200 mW** -
Repetition rate < 10 kHz to 80 MHz
freely adjustable
1 MHz to 80 MHz
freely adjustable
1 MHz to 80 MHz
freely adjustable
1 MHz to 40 MHz
freely adjustable
Spectral width << 1 nm << 1 nm << 1 nm << 1 nm
Output

Polarisation maintaining
fiber with FC/APC
output connector

collimated beam                     collimated beam                     collimated beam                   
PER > 10 dB > 20 dB > 20 dB > 20 dB
Power stability (12 hours)
(ΔT (ambient) < 0.5 K)
< 3 % rms < 3 % rms < 3 % rms < 3 % rms
Dimensions (l × w × h) 195 × 112 × 24 mm
without fiber
214 × 74 × 100 mm 214 × 74 × 100 mm 223 × 74 × 100 mm

(c) 766 nm/1063 nm

Model LDH-P-FA-765XL LDH-P-FA-1060 LDH-P-FA-1060XL
Center wavelength 766 ± 3 nm 1063 ± 3 nm 1063 ± 3 nm
Pulse width (FWHM) < 100 ps < 100 ps < 100 ps
Average output power
at 40 MHz repetition rate
100 mW 25 mW < 450 mW
Average output power
at 80 MHz repetition rate
> 100 mW > 50 mW** < 450 mW
Repetition rate 1 MHz to 80 MHz
freely adjustable
10 kHz to 80 MHz
freely adjustable
1 MHz to 80 MHz
freely adjustable
Spectral width << 1 nm << 1 nm << 1 nm
Output collimated beam FC/APC fiber receptacle collimated beam
PER > 20 dB > 10 dB > 10 dB
Power stability (12 hours)
(ΔT (ambient) < 0.5 K)
< 3 % rms < 3 % rms < 3 % rms
Dimensions (l × w × h) 223 × 74 × 100 mm 195 × 112 × 24 mm
without fiber
214 × 74 × 100 mm

(d) 1532 nm

Model LDH-P-FA-1530 LDH-P-FA-1530XL
Center wavelength 1532 ± 3 nm 1532 ± 3 nm
Pulse width (FWHM) < 100 ps < 100 ps
Average output power
at 40 MHz repetition rate
25 mW < 450 mW
Average output power
at 80 MHz repetition rate
< 50 mW** < 450 mW
Repetition rate 10 kHz to 80 MHz
freely adjustable
1 MHz to 80 MHz
freely adjustable
Spectral width << 1 nm << 1 nm
Output FC/APC fiber receptacle collimated beam
PER > 10 dB > 10 dB
Power stability (12 hours)
(ΔT (ambient) < 0.5 K)
< 3 % rms < 3 % rms
Dimensions (l × w × h) 195 × 112 × 24 mm without fiber 214 × 74 × 100 mm

*limited collimation range
**cooling optimization necessary - please ask PicoQuant for details.


All Information given here is reliable to our best knowledge. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications and external appearances are subject to change without notice.

The following documents are available for download:



Latest 10 publications referencing Pulsed Diode Lasers (PDL Series, LDH-Series, LDH-FA Series)

The following list is an extract of 10 recent publications from our bibliography that either bear reference or are releated to this product in some way. Do you miss your publication? If yes, we will be happy to include it in our bibliography. Please send an e-mail to info@picoquant.com containing the appropriate citation. Thank you very much in advance for your kind co-operation.