Auniontech LST Series High-Power Laser Optical Shutters
| Brand | Auniontech |
|---|---|
| Model Series | LST200 / LST400 / LST4WBK2 / LST500 / LST800 |
| Aperture | 2.3–16 mm |
| Max. Avg. Power Handling | 2–300 W |
| Switching Speed | 3–50 ms |
| Laser-Induced Damage Threshold (LIDT) | 30 mJ/cm² to 15 J/cm² (10 ns pulse, specified per model) |
| Origin | Shanghai, China |
| Compliance | ISO 9001-certified manufacturing environment |
| Mounting Interface | Standard SM1 (1.035"-40) and SM2 (2.035"-40) threading compatible |
Overview
The Auniontech LST Series High-Power Laser Optical Shutters are engineered for precise, repeatable beam gating in demanding continuous-wave (CW) and pulsed laser environments. Based on robust electromagnetic actuation and optimized thermal management architecture, these shutters operate without mechanical backlash or positional drift—ensuring sub-millisecond timing fidelity and long-term stability under sustained optical loading. Unlike solenoid-based alternatives with limited thermal dissipation, the LST platform integrates high-conductivity heat-sink substrates and low-absorption reflective coatings to maintain structural integrity at average power levels up to 300 W. Each shutter is calibrated for deterministic open/close response under TTL or analog voltage triggering, supporting synchronization with laser pulsing, data acquisition systems, and motion controllers in industrial processing, ophthalmic surgery, ultrafast spectroscopy, and laser-induced breakdown spectroscopy (LIBS) setups.
Key Features
- Multi-tiered aperture options (2.3 mm to 16 mm clear aperture) matched to common beam diameters in UV–NIR spectral ranges (193 nm – 1064 nm)
- Thermally stable shutter blades fabricated from oxygen-free copper substrates with dielectric HR/AR coatings, minimizing absorption and maximizing LIDT
- Electromechanical actuation with integrated position feedback sensors for closed-loop verification of blade status (optional on LST500/LST800 variants)
- Switching repeatability better than ±0.2 ms over >10⁷ cycles (tested at 1 Hz, ambient conditions)
- Standardized mounting interfaces: SM1 (1.035″-40) for compact models (LST200, LST4WBK2); SM2 (2.035″-40) for high-power variants (LST500, LST800)
- Low EMI design compliant with IEC 61326-1 for use in electromagnetically sensitive laboratory and cleanroom environments
Sample Compatibility & Compliance
The LST Series accommodates collimated or mildly focused beams across major industrial and scientific laser wavelengths—including excimer (193 nm, 248 nm), Nd:YAG (1064 nm, 532 nm, 355 nm), fiber lasers (1070 nm), and ultrafast Ti:sapphire systems (700–1000 nm). All models undergo individual LIDT validation per ISO 21254-1:2018 using calibrated 10 ns pulses at specified wavelengths and spot sizes. Units shipped with traceable calibration certificates indicating measured threshold fluence, spatial uniformity maps, and thermal decay profiles. The manufacturing process adheres to ISO 9001:2015 quality management standards; final assembly and burn-in testing occur in a Class 8 (ISO 14644-1) cleanroom environment. For regulated applications, optional documentation packages support GLP/GMP audit readiness—including equipment qualification records (IQ/OQ/PQ templates), raw test logs, and material traceability reports.
Software & Data Management
LST shutters interface natively via 5 V TTL logic (active-high or active-low configurable) and 0–5 V analog control input. Optional USB-C or RS-485 modules enable integration into LabVIEW, Python (PyVISA), MATLAB, or EPICS-based control frameworks. Firmware supports programmable dwell time (1 ms–60 s), auto-recovery mode after power interruption, and real-time status reporting (open/closed/overheated/fault). All communication protocols comply with IEEE 11073-10201 for interoperability with medical device networks. Audit trail functionality—logging timestamped command history, error codes, and thermal sensor readings—is available on firmware v2.3+ for FDA 21 CFR Part 11 compliance when paired with validated host software.
Applications
- Laser safety interlocks in Class 4 laser enclosures per IEC 60825-1:2014
- Pulse picking and burst-mode control in ultrafast amplifier chains
- Beam blanking during stage motion in laser micromachining and additive manufacturing systems
- Time-gated detection in fluorescence lifetime imaging (FLIM) and time-resolved Raman spectroscopy
- Dose-controlled irradiation in photodynamic therapy (PDT) and ophthalmic laser treatment platforms
- Protection of sensitive detectors (e.g., ICCD, SPAD arrays) during alignment and calibration procedures
FAQ
What is the maximum repetition rate supported by the LST400 model?
The LST400 achieves full mechanical cycle (open → close → open) in ≤40 ms, enabling reliable operation at up to 25 Hz with 50% duty cycle.
Can the LST800 be used with 355 nm UV lasers?
Yes—coating specifications include high reflectivity (>99.5%) and verified LIDT at 355 nm; contact technical support for wavelength-specific validation data.
Is vacuum compatibility available for any LST variant?
The LST500 and LST800 offer optional UHV-compatible versions (CF-35 flange mount, outgassing <1×10⁻⁹ Pa·m³/s per ASTM E595) upon request.
Do these shutters require external cooling?
No active cooling is required below 100 W average power; above this threshold, forced air or water-cooled heat-sink adapters are recommended and available as accessories.
How is blade position verified during operation?
All models include integrated Hall-effect sensors providing binary status output; closed-loop feedback variants add analog position signal (0–5 V) proportional to blade displacement.
