LDH-I Series

Application & Methods LDH-I Series Smart Picosecond Laser Diode Heads AVAILABLE WAVELENGTHS SPECIFICATIONS TECHNICAL DOWNLOADS KEY BENEFITS Wavelengths Specifications Optics focus length f' = 4.5 mm (Typ. for most LDH-IB) f‘ = 9.0 mm (Typ. for LDH-IB-xxx-T) Numerical aperture 0.55 Typical divergence (with optics) theta parallel typ. 0.11 mrad theta perpendicular typ. 0.32 mrad Polarization typ. linear, perpendicular to the longer axis of the elliptical beam* PER typ. > 1:10 (> 10 dB) Side mode suppression ratio (SMSR) typ. < 0.01 Peltier cooling stability better than 1 K for ambient temperature between 15 °C and 30 °C Cylinder 76 × 175 mm (diameter × length) Cylinder with fiber coupling 76 × 207 mm (diameter × length) Cuboid 175 × 77 × 83.7 mm (length × width × heigth) Cuboid with fiber coupling 207 × 77 × 83.7 mm (length × width × heigth) Wavelengths < 900 nm approx. 2 to 8 nm Wavelengths > 900 nm approx. 10 to 20 nm CW operation < 1 nm 12 hours, Delta T (ambient) < 3 K 1 % RMS, 3 % peak to peak Download the datasheet. * A few exceptions may occur. ** Narrow bandwidth on request. 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. 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. 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. 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. 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 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 Pulsed, Burst, and CW Modes Latest Blog Articles Measuring Carrier Lifetimes in Semiconductor Wafers