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LDH-I Series

LDH-I Series

Smart Picosecond Laser Diode Heads

Smart picosecond laser diode heads covering UV-A to NIR, providing the right combination of power, pulse width, and diode type for any time-resolved technique.
LDH-I Series smart picosecond diode laser head with integrated cooling, compatible with the Taiko PDL M1 driver for calibrated excitation in time-resolved spectroscopy.
Table of contents

Key Benefits

Higher measurements accuracy
Faster data acquisition
Broad experimental flexibility
Reliable synchronization
Improved experiment stability
Long-term consistency

Available Configurations

Wavelengths

Wavelength (±10) [nm]
Type
Pulse (FWHM) [ps]
Max. rep. rate [MHz]
Avg. power [mW]
CW power [mW]
375
LDH-IB-375-B
< 80
80
7
20
375
LDH-IB-375-M
spec on req
spec on req
spec on req
100
375
LDH-IB-375-M-B
spec on req
spec on req
spec on req
-
395
LDH-IB-390-B
< 70
100
20
50
405
LDH-IB-405-B
< 50
100
20
50
405
LDH-IB-405-M-P
< 100
50
50
200
405
LDH-IB-405-M
< 160
50
85
200
420
LDH-IB-420-B
< 60
100
12
50
440
LDH-IB-440-B
< 80
100
25
50
450
LDH-IB-450-B
< 70
80
12
50
450
LDH-IB-450-M
spec on req
spec on req
spec on req
-
470
LDH-IB-470-B
< 80
100
15
70
470
LDH-IB-470-M-P
spec on req
spec on req
spec on req
-
470
LDH-IB-470-M
spec on req
spec on req
spec on req
-
485
LDH-IB-485-P
< 120
60
3
40
485
LDH-IB-485-B
< 120
100
10
50
485
LDH-IB-485-M-P
< 140
50
35
200
485
LDH-IB-485-M
< 220
50
100
200
500
LDH-IB-500-B
< 110
70
7
40
515
LDH-IB-515-B
< 160
100
7
20
520
LDH-IB-520-M-P
< 130
50
13
200
520
LDH-IB-520-M
< 200
50
50
200
532
LDH-IB-530-T-P
< 80
100
spec on req
20
532
LDH-IB-530-T-B
< 80
100
1.1
20
561
LDH-IB-560-T-P
< 80
100
spec on req
20
561
LDH-IB-560-T-B
< 80
100
0.9
20
594
LDH-IB-595-T-P
< 100
100
spec on req
2
594
LDH-IB-595-T-B
< 100
100
0.5
2
640
LDH-IB-640-B
< 90
100
30
100
640
LDH-IB-640-M-P
< 130
60
40
200
640
LDH-IB-640-M
< 160
70
50
200
655
LDH-IB-650-B
< 90
100
10
100
670
LDH-IB-670-P
< 50
100
2.5
5
670
LDH-IB-670-B
< 70
100
7
5
685
LDH-IB-690-B
< 80
100
10
20
705
LDH-IB-705-B
< 70
100
20
25
730
LDH-IB-730-B
< 80
100
20
20
780
LDH-IB-780-B
< 70
100
30
80
805
LDH-IB-810-B
< 110
80
10
50
805
LDH-IB-810-M-P
< 70
100
50
200
805
LDH-IB-810-M
spec on req
spec on req
spec on req
-
830
LDH-IB-830-B
< 70
100
10
20
830
LDH-IB-830-M-P
< 90
100
50
200
830
LDH-IB-830-M
< 160
80
110
200
850
LDH-IB-850-B
spec on req
spec on req
spec on req
-
905
LDH-IB-905-B
< 100
100
8
50
910
LDH-IB-910-M-P
< 100
80
30
200
910
LDH-IB-910-M
< 180
80
150
200
940
LDH-IB-940-B
< 90
100
6
50
975
LDH-IB-980-B
< 100
100
7
50
980
LDH-IB-980-M-P
< 90
100
35
200
980
LDH-IB-980-M
< 180
80
100
200
1062
LDH-IB-1060-B
< 130
100
10
30
1310
LDH-IB-1310-B
< 50
100
3
15
1550
LDH-IB-1550-B
< 40
100
3
10
Detail explanations and measurements conditions for the listed specifications are provided in the datasheet.

Specifications

Optics focus lengthf' = 4.5 mm (Typ. for most LDH-IB) f‘ = 9.0 mm (Typ. for LDH-IB-xxx-T)
Numerical aperture0.55
Typical divergence (with optics)theta parallel typ. 0.11 mrad theta perpendicular typ. 0.32 mrad
Polarizationtyp. 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
Cylinder76 × 175 mm (diameter × length)
Cylinder with fiber coupling76 × 207 mm (diameter × length)
Cuboid175 × 77 × 83.7 mm (length × width × heigth)
Cuboid with fiber coupling207 × 77 × 83.7 mm (length × width × heigth)
Wavelengths < 900 nmapprox. 2 to 8 nm
Wavelengths > 900 nmapprox. 10 to 20 nm
CW operation< 1 nm
12 hours, Delta T (ambient) < 3 K1 % RMS, 3 % peak to peak

Download the datasheet here.

* A few exceptions may occur.
** Narrow bandwidth 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.

Smart Picosecond Diode Laser Heads for High-Performance Excitation

Smart Picosecond Excitation Across UV-A to NIR

The LDH-I Laser Series provides a versatile family of smart picosecond diode lasers designed for precise and calibrated excitation across UV-A to NIR wavelengths. Each laser head combines stable picosecond performance with automatic identification, stored calibration data, and seamless control when operated with Taiko PDL M1 Laser Driver. Offering narrow-pulse, high-power, and tapered-amplified diode laser options, the LDH-I Series supports flexible pulsed laser operation for a broad range of microscopic and spectroscopic techniques, as well as photonic ranging methods such as LiDAR. This makes it an adaptable diode laser source for a wide range of time-resolved techniques.

Experimental setup for the validation of the proposed pile-up correction methodology. Taken from Daniele et al., APL Photonics (2025).

LDH-I Laser in High-Rate TCSPC Measurements

High-speed TCSPC faces fundamental limits from pile-up and detector dead time, especially in fluorescence measurements at high photon rates. Advances in hybrid photodetectors and new correction frameworks now enable distortion-free lifetime analysis even beyond the excitation rate, opening the door to ultra-fast, high-precision time-resolved experiments.

Taiko PDL M1 picosecond diode laser driver with LDH-I smart laser head or PLS-I smart LED.

Seamless LDH-I Compatibility with Taiko PDL M1

In combination with the laser driver Taiko PDL M1, LDH-I laser heads turn into a fully calibrated excitation system. The driver automatically identifies each head, reads its stored power and wavelength calibration data, and keeps pulse energy and shape constant over the full repetition rate range in linear mode. Users benefit from intuitive feedback on the lasing regime, hot-swappable wavelength changes, and access to higher pulse energies in max-power mode.

LDH-I diode laser head with optional fiber coupling for single-mode and multi-mode fiber delivery.

Flexible Fiber Coupling Capability

Laser heads of the LDH I Series can be supplied with optional fiber coupling into either single mode or multi-mode fibers. Under typical conditions the achievable efficiencies are > 40 % for single mode coupling and > 80 % for multi-mode. All fiber coupled units are precisely aligned before delivery to ensure a stable output and consistent beam quality suited for fiber based experimental layouts.

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-FA 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
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Technical Documentation and Data

Technical Downloads

Datasheet LDH-I Series

Provides detailed specifications of these smart picosecond laser diode heads designed for the Taiko PDL M1 with precise, stable output

Dimension Sheet LDH-I

Showing mechanical design, C-mount interface, mounting points, and detailed dimensions for integration into optical setups.

Expand Your System

Compatible Laser Driver

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

Front view of the Taiko PDL M1 high-end picosecond diode laser driver with LCD display and control interface.
High-End Picosecond Diode Laser Driver
Higher pulse stability
Faster experiment setup
Cleaner timing performance
Greater operational flexibility
Improved long-term reproducibility
Reliable synchronization
Get a quote
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