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LDH Series Picosecond Laser Diode Heads

LDH Series

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LDH Series Picosecond Laser Diode Heads

High-performance picosecond diode laser heads delivering clean, stable excitation across a wide spectral range for time-resolved techniques in life science, materials science, quantum optics, and metrology. 375–1990 nm.

PULSE. POWER. PRECISION. RANGE.


Key Benefits

  • Higher excitation precision — clean, stable picosecond pulses across a wide spectral range
  • Faster data acquisition — adjustable repetition rates up to 80 MHz
  • Improved signal quality — carefully matched drive electronics and optics per head
  • More reliable long-term performance — Peltier-stabilised, calibrated output
  • Consistent output — power and wavelength stability across operating conditions
  • Seamless system integration — compatible with multiple established PicoQuant laser drivers

Broad Portfolio of Picosecond Diode Laser Heads

The LDH Series offers a broad portfolio of picosecond pulsed diode laser heads spanning wavelengths from the UV to the NIR (375–1990 nm). Each diode laser head combines carefully matched drive electronics and optics to deliver clean, stable picosecond pulses with adjustable repetition rates up to 80 MHz. Multiple diode types, tapered-amplified options, and single-mode or multimode fibre coupling provide wide flexibility across time-resolved techniques such as FLIM, FCS, TRPL, and LiDAR.


Compatible Laser Drivers

The LDH Series is fully compatible with the PDL 800-D, Sepia PDL 810, and Sepia PDL 828 drivers. This ensures reliable operation across different pulse modes, repetition rates, and wavelength configurations, enabling straightforward integration into both single- and multi-wavelength experimental setups.


Suitable for All Major Scientific Disciplines

The LDH Series is widely used across life sciences, materials research, quantum optics, and advanced sensing. Its clean picosecond pulses, broad wavelength coverage, and flexible driver compatibility support precise excitation in fluorescence studies, single-photon experiments, and ranging applications — making it a reliable choice wherever controlled laser excitation is essential.


Single Mode and Multi Mode Fibre Integration

LDH laser heads can be equipped with optional fibre coupling into single-mode, polarisation-maintaining single-mode, or multi-mode fibres. Typical coupling efficiencies reach above 40% for single-mode and above 80% for multi-mode. Each configuration is prealigned before shipment to ensure stable output and reliable beam delivery for fibre-based setups.


LDH Series — Available Configurations
Wavelength (±10) [nm]TypePulse (FWHM) [ps]Max. Rep. Rate [MHz]Avg. Power [mW]CW Power [mW]
375LDH-D-C-375< 9040540
375LDH-D-C-375S< 9040540
375LDH-D-C-375M< 2004025100
395LDH-D-C-390< 7040530
405LDH-D-C-405< 5540350
405LDH-D-C-405S< 5540350
405LDH-P-C-405M< 1004025
420LDH-D-C-420< 7040530
440LDH-D-C-440< 7040450
440LDH-D-C-440S< 7040450
450LDH-D-C-450< 7040550
450LDH-D-C-450S< 7040550
450LDH-P-C-450MSpec. on request4050
470LDH-D-C-470< 7040460
470LDH-D-C-470S< 7040460
470LDH-P-C-470M< 1204020
485LDH-D-C-485< 10040550
485LDH-D-C-485S< 12040550
488LDH-D-C-488< 160401.540
500LDH-D-C-500< 10040540
515LDH-D-C-515< 17040460
515LDH-D-C-515S< 17040460
520LDH-P-C-520M< 1604025
532LDH-D-TA-530< 80800.710
532LDH-D-TA-530-B< 80801.120
561LDH-D-TA-560< 80800.55
561LDH-D-TA-560-B< 80800.720
594LDH-D-TA-595< 100800.35
594LDH-D-TA-595-B< 100800.55
635LDH-D-C-635M< 1208020100
640LDH-D-C-640< 90802050
640LDH-D-C-640S< 90802050
655LDH-D-C-650< 9080610
660LDH-D-C-660< 90801030
670LDH-D-C-670< 708023
685LDH-D-C-690< 7080820
705LDH-D-C-705< 70801020
730LDH-D-C-730< 7080615
780LDH-D-C-780< 70801040
805LDH-D-C-810< 110801050
805LDH-P-C-810M< 2008050
805LDH-P-C-810MB< 600080380
830LDH-D-C-830< 7080820
830LDH-P-C-830M< 2008025
845LDH-D-C-850< 90801050
852LDH-D-F-N-852< 100801025
905LDH-D-C-905< 9080850
940LDH-D-C-940< 9080550
975LDH-D-C-980< 8080650
976LDH-D-F-980< 1108025100
980LDH-P-C-980MB< 600080380
1030LDH-D-F-1030< 1508010100
1030LDH-D-F-N-1030< 1008010100
1060LDH-D-C-1060< 100801030
1062LDH-D-C-N-1064< 80801025
1062LDH-D-F-N-1064< 1308010100
1310LDH-D-C-N-1310< 4080515
1550LDH-D-C-1550< 608012.5
1550LDH-D-C-N-1550< 5080210
1550LDH-D-F-N-1550< 6080220
1990LDH-D-F-1990< 120800.3

 

Specifications
Optics focal lengthf’ = 4.5 mm (typ. for LDH-P/D-C-xxx)
f’ = 9.0 mm (typ. for LDH-D-TA-xxx)
Numerical aperture0.55
Typical divergence (with optics)θ parallel typ. 0.11 mrad
θ perpendicular typ. 0.32 mrad
Polarisationtyp. linear, perpendicular to the longer axis of the elliptical beam*
PERtyp. > 1:10 (> 10 dB)
Side mode suppression ratio (SMSR)typ. < 0.01
Peltier cooling stabilitybetter than 1 K for ambient temperature between 15 °C and 30 °C
Wavelength drift, < 900 nmapprox. 2–8 nm
Wavelength drift, > 900 nmapprox. 10–20 nm
CW operation (wavelength drift)< 1 nm
12 hours, ΔT (ambient) < 3 K1% RMS, 3% peak to peak
Cooled housing (ø × length)62 × 100 mm; with fibre coupling: 62 × 132 mm
Flat type housing (l × w × h)195 × 112 × 24 mm
Cooled D-TA-type housing (ø × length)68 × 148 mm
“F-type” with FC/APC connector (l × w × h)200 × 100 × 35 mm
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