Excimer Laser System – Coherent COMPexPro 208
| Key | Wavelength Options: 157 nm, 193 nm, 222 nm, 248 nm, 308 nm, 351 nm |
|---|---|
| Pulse Energy | 0.3–360 mJ per pulse |
| Repetition Rate | 60–300 Hz |
| Pulse Width | 2.5–27 ns (FWHM) |
| Gas Lifetime | Up to 10⁷ pulses per gas fill (gas-dependent) |
| Thyratron Warranty | 2 years or 3×10⁸ shots |
Overview
The Coherent COMPexPro 208 is a high-performance, industrial-grade excimer laser system engineered for precision photonic applications requiring deep-UV to near-UV pulsed output. Operating on the principle of transient molecular excitation in rare-gas halide gas mixtures (e.g., ArF, KrF, XeCl, KrCl), it delivers nanosecond-duration pulses with exceptional temporal stability and spatial beam homogeneity. Unlike continuous-wave or solid-state UV sources, excimer lasers generate high-peak-power radiation through electron-beam or discharge-pumped population inversion in short-lived excited dimers—enabling non-thermal, photon-driven interactions critical for photoablation, photolysis, and nonlinear frequency conversion. The COMPexPro 208 is designed for integration into cleanroom-compatible platforms used in semiconductor lithography R&D, optical component fabrication, and regulated biomedical instrumentation.
Key Features
- Metal-ceramic laser chamber architecture ensures dimensional stability under thermal cycling and minimizes outgassing—critical for maintaining gas purity and long-term pulse consistency.
- Gentle corona pre-ionization technology enables uniform volumetric discharge initiation, reducing electrode erosion and suppressing arc formation—resulting in improved shot-to-shot energy stability (≤±1.5% RMS over 10⁴ pulses).
- Integrated high-efficiency intra-cavity particulate filter mitigates optical contamination from electrode sputtering, extending mirror lifetime and sustaining M² < 1.6 beam quality across all wavelengths.
- Long-life thyratron switch rated for 3×10⁸ operational pulses (or 2-year warranty), optimized for low-jitter triggering (<5 ns jitter) and robust performance at maximum repetition rates up to 300 Hz.
- Low-consumption KrCl configuration for 222 nm emission supports extended operation with reduced gas replenishment frequency—ideal for high-duty-cycle applications such as FBG inscription or surface functionalization.
Sample Compatibility & Compliance
The COMPexPro 208 is compatible with standard excimer gas blends (ArF, KrF, XeCl, KrCl, XeF) and operates within ISO Class 5 cleanroom environments when equipped with optional purge enclosures. Its optical output meets IEC 60825-1:2014 Class 4 laser safety requirements; integrated interlock interfaces support integration with OEM safety cabinets compliant with EN 61496-1. For regulated life-science applications—including ophthalmic refractive surgery systems—the laser’s pulse parameter logging and hardware-based shutter control facilitate alignment with FDA 21 CFR Part 11 data integrity requirements when paired with validated host software.
Software & Data Management
Control is executed via Coherent’s COMPexPro Control Suite—a Windows-based application supporting local and remote operation via Ethernet (TCP/IP). Real-time monitoring includes pulse energy (via internal pyroelectric sensor), repetition rate, gas pressure, thyratron temperature, and cumulative shot count. All operational parameters are timestamped and exportable in CSV/ASCII format for GLP/GMP audit trails. Optional LabVIEW™ and MATLAB® drivers enable synchronization with motion stages, spectrometers, or time-resolved detectors for pump-probe experiments or automated material processing workflows.
Applications
- Fiber Bragg grating (FBG) fabrication using phase-mask or interferometric techniques at 193 nm (ArF) or 248 nm (KrF)
- Laser desorption/ionization mass spectrometry (LDI-MS) and matrix-assisted LDI (MALDI) source excitation
- Time-resolved laser-induced fluorescence (TRLIF) spectroscopy for combustion diagnostics and plasma kinetics
- Photochemical vapor generation and UV-initiated polymer crosslinking
- Excimer-based micromachining of polymers, glasses, and thin-film solar materials with sub-micron feature resolution
- Pulsed laser deposition (PLD) of complex oxides (e.g., YBCO, STO) and nitride films
- Clinical excimer laser systems for corneal photoablation (e.g., LASIK platforms operating at 193 nm)
- Nonlinear optical parametric amplification (OPA) pumping in ultrafast science setups
FAQ
What gas mixtures are supported by the COMPexPro 208?
The system supports standard rare-gas halide blends including ArF (193 nm), KrF (248 nm), XeCl (308 nm), KrCl (222 nm), XeF (351 nm), and F₂ (157 nm), with gas handling protocols aligned with ASTM E1707 for excimer laser maintenance.
Is the laser compliant with international laser safety standards?
Yes—fully certified to IEC 60825-1:2014 (Class 4), with integrated key-switch interlocks, emission indicators, and beam shutter control meeting EN 60825-1 mechanical safety provisions.
Can pulse energy be monitored in real time during operation?
Yes—integrated pyroelectric energy sensor provides calibrated, traceable pulse-by-pulse measurement with ≤±3% uncertainty (NIST-traceable calibration available).
What is the typical warm-up time to achieve stable output?
Under standard lab conditions (22 ± 2°C, <50% RH), the system achieves energy stability within ±2% after 15 minutes of operation at 100 Hz.
Does the system support external trigger synchronization?
Yes—TTL-compatible sync input accepts external triggers with programmable delay (0–100 ms, 10 ns resolution) and jitter <10 ns RMS, enabling precise timing in pump-probe or multi-laser experiments.
