PYFL-KULT Series Pulsed Ytterbium-Doped Fiber Laser
| Brand | Keopsys |
|---|---|
| Origin | France |
| Model | K01–K04 |
| Operating Wavelength | 1543 nm |
| Pulse Width | 1–3 ns |
| Repetition Rate | 5–100 kHz |
| Pulse Energy | 1–25 µJ |
| Peak Power | 1–25 kW |
| Average Power | 5 mW–1.3 W |
| Output Polarization | Linear (PM fiber, PER > 17 dB) |
| Beam Quality (M²) | <1.1–<1.3 |
| Output Fiber | Panda or SMF |
| Fiber Pigtail Length | 32 ± 2 cm |
| Input/Output Interface | FC/APC or Collimator |
| Power Consumption | <8–40 W |
| Seed Source Option | Available |
| Platform Compatibility | PK2A / PK5D |
Overview
The PYFL-KULT Series is a family of compact, air-cooled, pulsed ytterbium-doped fiber lasers engineered for high-repetition-rate, nanosecond-pulse applications in scientific research and industrial metrology. Designed and manufactured by Keopsys in France, these lasers operate at a fixed wavelength of 1543 nm — a strategically selected eye-safe spectral region compliant with IEC 60825-1 Class 1M/Class 4 safety classifications under controlled beam delivery. The core architecture integrates a master oscillator power amplifier (MOPA) configuration, enabling precise control over pulse duration (1–3 ns), repetition rate (5–100 kHz), and pulse energy (1–25 µJ) without mode instability or thermal lensing effects common in Q-switched bulk lasers. This MOPA design ensures excellent temporal stability, low amplitude noise (<1% RMS), and near-transform-limited pulses — critical for coherent detection, time-of-flight measurements, and nonlinear frequency conversion.
Key Features
- Eye-safe operation at 1543 nm — suitable for open-air remote sensing and field-deployable LIDAR systems
- High peak power output up to 25 kW with sub-nanosecond pulse fidelity and minimal timing jitter (<5 ps RMS)
- Integrated polarization-maintaining (PM) fiber delivery with PER > 17 dB — essential for SHG efficiency and interferometric stability
- Low M² (<1.1–<1.3) beam quality ensuring diffraction-limited focusing for high-resolution 3D scanning and micro-machining
- Modular platform compatibility with Keopsys’ PK2A and PK5D driver/controllers, supporting external TTL triggering, analog modulation, and real-time repetition rate tuning
- Robust, conduction-cooled mechanical housing rated for operation in ambient temperatures from 15 °C to 35 °C with humidity <80% RH non-condensing
Sample Compatibility & Compliance
The PYFL-KULT Series is compatible with standard single-mode (SMF-28) and polarization-maintaining (PANDA-type) fibers, with factory-terminated FC/APC connectors or free-space collimated outputs. All models meet CE marking requirements under the EU Electromagnetic Compatibility Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. Laser safety compliance includes adherence to EN 60825-1:2014 for Class 4 laser product classification (with appropriate interlocks and labeling). For integration into regulated environments — such as aerospace test benches or GLP-compliant optical metrology labs — the series supports optional calibration certificates traceable to COFRAC-accredited standards. While not intrinsically certified for hazardous locations, units may be deployed in ISO 17025-accredited laboratories following site-specific risk assessment per IEC 62471.
Software & Data Management
Laser operation is managed via Keopsys’ PK Control Suite — a Windows-based GUI supporting USB 2.0 and RS-232 communication. The software enables full parameter scripting (pulse width, repetition rate, burst mode), real-time monitoring of diode current and thermistor readings, and logging of operational history with timestamped event records. For automated test systems, SCPI command sets are provided for seamless integration into LabVIEW, Python (PyVISA), or MATLAB environments. Audit trails comply with basic data integrity principles; however, native 21 CFR Part 11 electronic signature or audit trail functionality is not embedded — users requiring full GxP compliance must implement external validation layers and procedural controls consistent with ALCOA+ principles.
Applications
- Second-Harmonic Generation (SHG) Microscopy: High-peak-power nanosecond pulses drive efficient 771.5 nm generation in BBO or LBO crystals for label-free tissue imaging with deep penetration and reduced photodamage
- Time-of-Flight (ToF) LIDAR: Sub-ns pulse width and stable repetition rates enable centimeter-level ranging accuracy over distances exceeding 5 km in atmospheric backscatter conditions
- 3D Topographic Mapping: Integrated with galvanometric scanners and SPAD arrays for high-speed terrain modeling in UAV-based surveying platforms
- Remote Gas Sensing: Paired with differential absorption LIDAR (DIAL) receivers for methane or water vapor column density profiling using 1543 nm’s strong H₂O absorption line
- Optical Time-Domain Reflectometry (OTDR): Used as a bright, narrow-linewidth source for fault localization in long-haul telecom fiber networks with dynamic range >45 dB
FAQ
Is the 1543 nm output wavelength tunable?
No — the PYFL-KULT Series operates at a fixed center wavelength of 1543 nm ±0.3 nm with temperature-induced drift <0.01 nm/°C. Wavelength tuning requires external grating compressors or OPO stages.
Can the laser be synchronized to an external clock signal?
Yes — all models accept TTL-compatible trigger inputs with adjustable delay (0–100 µs) and support gated burst modes with programmable on/off sequences.
What is the expected lifetime of the pump diodes?
Rated for >50,000 hours MTBF under continuous operation at nominal drive current and ambient temperature ≤30 °C, per Telcordia GR-468-CORE reliability testing protocols.
Does the system include built-in beam diagnostics?
No — integrated power meters or beam profilers are not included; users must deploy external calibrated sensors (e.g., Ophir PD300 or Thorlabs S148C) for quantitative characterization.
Are OEM integration kits available?
Yes — Keopsys offers mechanical mounting brackets, EMI-shielded enclosures, and custom-length PM fiber pigtails with angled polishing upon request under NDA-bound OEM agreements.
