SPL-N Series Pulsed Nitrogen Laser System
| Brand | SPL |
|---|---|
| Origin | USA |
| Type | Gas Laser Instrument |
| Model | SPL-N |
| Wavelength | 337 nm |
| Pulse Duration | ~10 ns |
| Pulse Energy | 30–240 µJ |
| Average Power | 0.03–240 mW |
| Beam Mode | TEM₀₀ or TEMₘₙ |
| Repetition Rate | 1–1000 Hz |
| Cooling | Air-cooled |
| Compliance | CE, RoHS, FDA 21 CFR Part 1040.10 (Laser Product Safety) |
Overview
The SPL-N Series is a line of compact, air-cooled pulsed nitrogen lasers engineered for precision ultraviolet photonics applications requiring stable 337 nm output. Operating on the principle of molecular nitrogen gas discharge under transverse or longitudinal electrical excitation, these lasers generate short-duration optical pulses (~10 ns FWHM) via stimulated emission from the C³Πᵤ → B³Πg electronic transition in N₂. Unlike continuous-wave UV sources, the pulsed nature and narrow spectral bandwidth (<0.1 nm) of nitrogen lasers provide high peak power density—enabling nonlinear excitation, precise ablation, and efficient photochemical initiation without thermal damage to sensitive substrates. Designed for integration into OEM systems and laboratory setups, the SPL-N series delivers reliable performance in environments where wavelength specificity, pulse timing fidelity, and long-term operational stability are critical.
Key Features
- Stable 337 nm ultraviolet output with inherent narrow linewidth and low spatial mode divergence
- Adjustable repetition rate (1–1000 Hz), supporting both single-shot and high-throughput operation
- TEM₀₀ or higher-order TEMₘₙ beam profiles optimized for focused spot size <5 µm (with appropriate optics)
- Integrated high-voltage pulsing circuitry with precise timing control (jitter <2 ns) for synchronization with external detectors or shutter systems
- Robust all-metal sealed-tube construction with extended service life (>1 × 10⁸ pulses typical)
- Compliance with international laser safety standards: IEC 60825-1:2014, FDA 21 CFR Part 1040.10, and EN 60825-1
- No external water cooling required—fully air-cooled architecture simplifies system integration and reduces infrastructure overhead
Sample Compatibility & Compliance
The SPL-N laser is routinely deployed in photolithography support workflows, including photomask retouching, thin-film resistor trimming, and hybrid IC patterning—applications demanding sub-micron resolution and high photon energy at 337 nm. Its spectral output aligns closely with the peak sensitivity range of common g-line and i-line photoresists (e.g., Shipley S1800, AZ series), enabling efficient exposure with minimal dose accumulation. All models meet ISO 13485-aligned manufacturing controls and are supplied with full traceable calibration documentation. For regulated environments, optional audit-ready firmware supports GLP/GMP-compliant operation, including timestamped event logging and user-accessible parameter change history per FDA 21 CFR Part 11 requirements.
Software & Data Management
Each SPL-N unit includes RS-232 and TTL-compatible trigger I/O ports for seamless integration with LabVIEW, MATLAB, or custom DAQ platforms. Optional SPL Control Suite software provides real-time monitoring of pulse count, repetition rate, and interlock status; supports automated duty-cycle limiting and thermal derating profiles. All firmware updates are digitally signed and delivered via secure HTTPS endpoint. Raw pulse data—including shot-to-shot energy deviation (±1.5% RMS over 10⁶ pulses)—is exportable in CSV/JSON format for statistical process control (SPC) analysis. Audit trails comply with ISO/IEC 17025 Annex A.2 for measurement uncertainty reporting.
Applications
- UV fluorescence excitation in time-resolved spectroscopy and LIF (Laser-Induced Fluorescence)
- Pumping of dye lasers (e.g., Coumarin, Rhodamine derivatives) for tunable visible output
- Direct-write microfabrication of polymer waveguides and microfluidic channel definition
- Calibration source for UV spectroradiometers and CCD-based quantum efficiency measurements
- Photoablation of organic thin films in R&D cleanroom environments (ASTM F2613-22 compliant)
- Seed source for ultrafast amplifier systems requiring precise temporal seeding at 337 nm
FAQ
What is the typical lifetime of the nitrogen gas fill in SPL-N lasers?
The sealed tube design ensures >1 × 10⁸ pulses under nominal operating conditions (≤500 Hz, 25°C ambient). Lifetime is inversely proportional to average power loading and ambient humidity exposure.
Can SPL-N lasers be synchronized with external equipment such as streak cameras or gated detectors?
Yes—TTL-compatible sync output (5 V, <5 ns rise time) and external trigger input (3–12 V, adjustable delay 0–100 µs) enable sub-nanosecond jitter synchronization.
Is laser classification documentation available for facility safety review?
Each unit ships with a Class IV laser product report per IEC 60825-1, including measured divergence, MPE calculations, and recommended nominal ocular hazard distance (NOHD).
Do SPL-N models support remote parameter adjustment via computer interface?
RS-232 command set allows full control of repetition rate, pulse inhibit state, and interlock override (subject to safety interlock hierarchy). Firmware v2.3+ adds password-protected configuration lock.
Are custom beam delivery optics or fiber coupling options available?
SPL offers OEM-integrated UV-grade fused silica collimators, focusing objectives (NA 0.1–0.5), and 337 nm-optimized multimode fiber launchers (core diameter 50–200 µm, NA 0.22).
