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LDH Series

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
LDH Series picosecond diode laser heads
Table of contents

Key Benefits

Higher excitation precision
Faster data acquisition
Improved signal quality
More reliable long-term performance
Consistent output
Seamless system integration

Available Configurations

Wavelengths

Wavelength (±10) [nm]
Type
Pulse (FWHM) [ps]
Max. rep. rate [MHz]
Avg. power [mW]
CW power [mW]
375
LDH-D-C-375
< 90
40
5
40
375
LDH-D-C-375S
< 90
40
5
40
375
LDH-D-C-375M
spec on req
40
25
100
395
LDH-D-C-390
< 70
40
5
30
405
LDH-D-C-405
< 50
40
3
50
405
LDH-D-C-405S
< 50
40
3
50
405
LDH-P-C-405M
spec on req
spec on req
spec on req
-
405
LDH-D-C-405M
spec on req
spec on req
spec on req
-
420
LDH-D-C-420
< 70
40
5
30
440
LDH-D-C-440
< 70
40
4
50
440
LDH-D-C-440S
< 70
40
4
50
450
LDH-D-C-450
< 70
40
5
50
450
LDH-D-C-450S
< 70
40
5
50
450
LDH-P-C-450M
spec on req
spec on req
spec on req
-
470
LDH-D-C-470
< 70
40
4
60
470
LDH-D-C-470S
< 70
40
4
60
470
LDH-P-C-470M
< 120
40
20
-
485
LDH-D-C-485
< 100
40
5
50
485
LDH-D-C-485S
< 120
40
5
50
488
LDH-D-C-488
< 160
40
1.5
40
500
LDH-D-C-500
< 100
40
5
40
515
LDH-D-C-515
< 170
40
4
60
515
LDH-D-C-515S
< 170
40
4
60
520
LDH-P-C-520-M
< 160
40
25
-
532
LDH-D-TA-530
< 80
80
0.7
10
532
LDH-D-TA-530-B
< 80
80
1.1
20
561
LDH-D-TA-560
< 80
80
0.5
5
561
LDH-D-TA-560-B
< 80
80
0.7
20
594
LDH-D-TA-595
< 100
80
0.3
5
594
LDH-D-TA-595-B
< 100
80
0.5
5
635
LDH-D-C-635-M
< 120
80
20
100
640
LDH-D-C-640
< 90
80
20
50
640
LDH-D-C-640-S
< 90
80
20
50
655
LDH-D-C-650
< 90
80
6
10
660
LDH-D-C-660
< 90
80
10
30
670
LDH-D-C-670
< 70
80
2
3
685
LDH-D-C-690
< 70
80
8
20
705
LDH-D-C-705
< 70
80
10
20
730
LDH-D-C-730
< 70
80
6
15
780
LDH-D-C-780
< 70
80
10
40
805
LDH-D-C-810
< 110
80
10
50
805
LDH-P-C-810-M
spec on req
spec on req
spec on req
-
805
LDH-P-C-810-MB
< 6000
80
380
-
830
LDH-D-C-830
< 70
80
8
20
830
LDH-P-C-830-M
spec on req
spec on req
spec on req
-
845
LDH-D-C-850
< 90
80
10
50
852
LDH-D-F-N-852
spec on req
spec on req
spec on req
25
905
LDH-D-C-905
< 90
80
8
50
940
LDH-D-C-940
< 90
80
5
50
975
LDH-D-C-980
< 80
80
6
50
976
LDH-D-F-980
< 110
80
25
100
980
LDH-P-C-980-MB
< 6000
80
380
-
1030
LDH-D-F-1030
spec on req
spec on req
spec on req
100
1030
LDH-D-F-N-1030
spec on req
spec on req
spec on req
100
1060
LDH-D-C-1060
spec on req
spec on req
spec on req
30
1062
LDH-D-C-N-1064
< 80
80
10
25
1062
LDH-D-F-N-1064
spec on req
spec on req
spec on req
100
1310
LDH-D-C-N-1310
spec on req
spec on req
spec on req
15
1550
LDH-D-C-1550
< 60
80
1
2.5
1550
LDH-D-C-N-1550
< 50
80
2
10
1550
LDH-D-F-N-1550
< 60
80
2
20
1990
LDH-D-F-1990
< 120
80
0.3
-
Detail explanations and measurements conditions for the listed specifications are provided in the datasheet.

Specifications

Optics focus 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 opticstyp. Theta ǁ 0.11 mrad, typ. Theta ┴ 0.32 mrad
Polarizationtyp. linear, perpendicular to the longer axis of the elliptical beam*
PERtyp. > 1:10 (> 10 dB)
Sidemode suppression ratio (SMSR)typ. < 0.01
Peltier cooling stabilitybetter than 1 K for ambient temperature between 15 °C and 30 °C
Wavelength < 900 nmapprox. 2-8 nm
Wavelength > 900 nmapprox. 10-20 nm
CW operation< 1 nm
12 hours, DT (ambient) < 3 K 1 % RMS, 3 % peak to peak
Cooled (ø × length) 62 × 100 mm, with fiber coupling: 62 × 132 mm
Flat type (l × w × h)195 × 112 × 24 mm
Cooled D-TA-type (ø × length)68 × 148 mm
„F-type“ with FC/APC connector (l × w × h)200 × 100 × 35 mm

Download the datasheet here.

* A few exceptions to this behavior might occur
** Narrower bandwidth might be available on request

Laser Safety Warning Label (Class 3B)
Laser Safety Warning Label (Class 3B)

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.

Pulse. Power. Precision. Range.

Stable Picosecond Pulses for High-Precision Optical Measurements

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. 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 fiber coupling provide wide flexibility across time-resolved techniques like FLIM, FCS, TRPL, as well as LiDAR.

Sepia PDL 828 operating with LDH laser heads and compatible with LDH Series light sources for flexible multi-wavelength excitation.

Compatible Laser Driver with LDH

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. This versatility makes the LDH platform a reliable choice wherever controlled laser excitation is essential.

LDH Series picosecond diode laser heads with optional fiber coupling for single-mode or multimode fiber delivery.

Single Mode and Multi Mode Fiber Integration

LDH laser heads can be equipped with optional fiber coupling into single mode, polarization-maintaining single-mode or multi-mode fibers. Typical 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 fiber-based setups.

Laser Combining Unit (LCU) integrating multiple picosecond laser heads for fiber-coupled excitation.

Laser Combining Unit for up to 5 Laser Lines

For multi-color excitation, several LDH laser heads can also be combined into a single polarization-maintaining fiber using PicoQuant’s Laser Combining Unit (LCU), enabling compact and flexible multi-wavelength excitation configurations.

  • Wavelength 375 nm to 900 nm
  • Up to 5 laser lines
  • Polarisation maintaining singlemode output fiber
  • Flexible configurations
Advanced Laser Operation Modes

Pulsed, Burst, and CW Modes

In materials science, choosing the right laser operation mode is key to unlocking accurate and insightful experimental results. Relevant modes: pulsed, burst, CW, fast switched CW.
Discover operation modes
Discover How Pulsed, Burst, and CW Modes Advance Your Research Goals
Scientific Insights & Resources

Latest Blog Articles

FLIM-FRET lifetime map showing reduced donor lifetime of PRG5 at the plasma membrane and in filopodia of HEK293T cells.
January 3, 2025

Resolving Protein Multimerization with Quantitative FLIM-FRET

Experimental setup for temperature-dependent SPAD timing jitter measurements using picosecond lasers and TCSPC electronics.
January 23, 2025

SPAD Timing Jitter Revealed by TCSPC

FLIM-FRET lifetime map showing reduced donor lifetime of PRG5 at the plasma membrane and in filopodia of HEK293T cells.
January 3, 2025

Resolving Protein Multimerization with Quantitative FLIM-FRET

Experimental setup for temperature-dependent SPAD timing jitter measurements using picosecond lasers and TCSPC electronics.
January 23, 2025

SPAD Timing Jitter Revealed by TCSPC

Visit our science hub
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Technical Documentation and Data

Technical Downloads

Datasheet LDH Series

Contains specifications, wavelengths, pulse parameters and beam data for picosecond laser diode heads for PDL 800-D and PDL 828

Dimension Sheet LCU 4-Channel Laser Coupling Unit

Dimension sheet of the LCU 4-Channel laser coupling unit showing mechanical layout, LDH mounting positions, fiber input configuration, and overall system dimensions.

Dimension Sheet LDH-P/D-C Laser Heads

Dimension sheet of the LDH-P/D-C laser head series showing mechanical layout, mounting options, cable routing, and integration variants with plates, filters, and adapters.

Picosecond Pulse Characteristics

Pulse profiles of LDH-P-C-485B picosecond diode laser head measured at different optical output powers.
Measured pulse profiles of the LDH-P-C-485B picosecond diode laser head at different optical output powers.
Pulse profiles of LDH-P-C-640B picosecond diode laser head measured at different optical output powers.
Measured pulse profiles of LDH-P-C-640B picosecond diode laser head at different optical output powers.
Pulse profile of LDH-D-TA-530 picosecond laser head showing a deconvoluted pulse duration of about 20 ps.
Measured pulse profile of LDH-D-TA-530 tapered-amplified picosecond laser head with a deconvoluted pulse duration of about 20 ps.
Pulse profile of LDH-P-C-1060 picosecond diode laser head showing a deconvoluted pulse duration of about 19.5 ps.
Measured pulse profile of LDH-P-C-1060 picosecond diode laser head with a deconvoluted pulse duration of about 19.5 ps.
Expand Your System

Compatible Laser Driver

Combine compatible components to build a complete system tailored to your experimental requirements and measurement workflows.

Sepia PDL 828 multichannel picosecond diode laser driver with modular laser channels for controlling multiple LDH and PLS laser heads
Multichannel Picosecond Diode Laser Driver
Higher timing precision
Improved long-term system stability
Reduced setup complexity
Reproducible measurement
Easy system integration
Scalable system growth
Get a quote
Front view of Sepia PDL 810 picosecond diode laser driver.
Single Channel Picosecond Diode Laser Driver
Reliable timing for accurate measurements
Greater workflow efficiency
Flexible adaptation to diverse methods
Easy system integration
Stable long-term performance
Get a quote
PicoQuant PDL 800-D picosecond pulsed diode laser driver for LDH and PLS light sources
Picosecond Diode Laser Driver
Accurate timing control
Fast wavelength switching
Broad method compatibility
Smooth system integration
Consistent long-term stability
Get a quote
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