Auniontech IXION 193 SLM Diode-Pumped Solid-State Single-Longitudinal-Mode DUV Laser

Overview

The Auniontech IXION 193 SLM is a diode-pumped solid-state (DPSS), single-longitudinal-mode (SLM) deep ultraviolet (DUV) laser system engineered for metrological-grade stability and spectral purity at 193.368 nm. Based on fourth-harmonic generation (FHG) of a Nd:YAG or Nd:YVO₄ fundamental source followed by intracavity or external cavity frequency conversion in nonlinear crystals (e.g., BBO or CLBO), the system delivers transform-limited pulses with near-Fourier-limited spectral bandwidth (< 80 MHz), enabling coherence lengths exceeding 2 meters. Designed in collaboration with Xiton Photonics GmbH — a German developer with over two decades of expertise in high-stability DPSS lasers and nonlinear optical systems — the IXION 193 SLM serves as a primary reference source for applications demanding absolute wavelength accuracy, sub-picometer spectral control, and long-term amplitude reproducibility under laboratory or cleanroom conditions.

Key Features

• Single-longitudinal-mode operation with linewidth < 80 MHz, supporting interferometric applications requiring high temporal coherence.
• Wavelength stability ≤ ±0.5 pm over 8 hours (temperature-controlled environment), traceable to NIST-calibrated wavemeters.
• Power stability σ < 2.5 % RMS over 4 hours (10 Hz low-pass filtered measurement), achieved via active pump diode current regulation and thermal management of nonlinear stages.
• Diffraction-limited beam quality (M² < 1.6) ensuring efficient coupling into single-mode fibers, spatial filters, and interferometric cavities.
• Configurable spectral tuning range > 10 pm across 185–194 nm, implemented via precision angle-tuning of phase-matching crystals or cavity-length feedback.
• Rugged monolithic optomechanical architecture with kinematic mounts and hermetically sealed harmonic generation modules to minimize sensitivity to ambient vibration and humidity.

Sample Compatibility & Compliance

The IXION 193 SLM is compatible with standard 193 nm optical components including fused silica lenses, CaF₂ windows, reflective optics with enhanced DUV coatings, and vacuum-compatible beam delivery paths. Its output meets ISO 10110-7 surface quality specifications for transmitted wavefront distortion and complies with IEC 60825-1:2014 Class 4 laser safety requirements. For regulated environments, the system supports integration into GLP/GMP workflows through optional hardware interlocks, emission logging, and audit-ready operational logs. While not pre-certified to FDA 21 CFR Part 11, its digital control interface (RS-232/USB) enables third-party validation of parameter setting history and output verification records.

Software & Data Management

Control is provided via Auniontech’s LX-Command Suite — a cross-platform application supporting real-time monitoring of pulse energy, repetition rate, temperature setpoints, and internal photodiode feedback signals. The software exports timestamped CSV datasets compliant with ASTM E2917-21 (Standard Practice for Monitoring and Controlling Processes Using Multivariate Statistical Methods). Optional LabVIEW™ and Python SDKs enable automated calibration sequences, closed-loop wavelength locking, and synchronization with external detectors or motion stages. All configuration changes are logged with user ID, timestamp, and parameter delta, satisfying traceability requirements for ISO/IEC 17025-accredited laboratories.

Applications

• 193 nm Optical Metrology: Calibration of EUV mask inspection tools, aerial image metrology systems, and immersion lithography alignment sensors.
• Spectrometer Validation: Linearity and wavelength accuracy verification of DUV spectrometers (e.g., CCD-based VUV-DUV instruments) using known atomic transitions (e.g., Ar II lines near 193 nm).
• Interferometric Sensing: Long-path gas-phase absorption measurements (e.g., O₃, SO₂) and thin-film thickness mapping in semiconductor process control.
• Excimer Laser Injection Seeding: Narrowband seeding of high-energy ArF excimer amplifiers to reduce spectral bandwidth from ~1 pm to < 0.1 pm, improving projection lens resolution in stepper systems.
• Fundamental Physics Experiments: Precision spectroscopy of trapped ions (e.g., Ca⁺, Sr⁺) and Rydberg-state excitation where 193 nm coincides with strong dipole-allowed transitions.

FAQ

Is the 193.368 nm wavelength fixed or tunable?
The nominal wavelength is 193.368 nm, but the system can be factory-configured for any center wavelength between 185 nm and 194 nm; fine tuning (> 10 pm) is supported via crystal angle adjustment or cavity piezo actuation.
What cooling method does the laser require?
The system operates with air-cooling for ambient temperatures up to 25 °C; for continuous operation above 10 kHz or in non-climate-controlled labs, optional recirculating chiller integration (18–22 °C setpoint) is recommended to stabilize nonlinear conversion efficiency.
Can this laser be integrated into a vacuum chamber?
Yes — the output beam path is compatible with UHV environments (≤10⁻⁶ mbar); optional CF-40 flange-mounted exit ports and all-metal sealed harmonic modules are available upon request.
Does the system include beam diagnostics?
Standard configuration includes an integrated photodiode for pulse energy monitoring and a thermopile sensor for average power verification; optional M² measurement kit and scanning Fabry–Pérot interferometer for real-time linewidth confirmation are available as accessories.
What regulatory documentation is supplied?
Each unit ships with EC Declaration of Conformity (CE), RoHS compliance statement, full optical safety report per IEC 60825-1, and factory calibration certificate traceable to PTB/NIST standards.