Avantes AvaRaman Bundles Portable Raman Spectrometer

Overview

The Avantes AvaRaman Bundles is a turnkey portable Raman spectroscopy system engineered for high-fidelity molecular fingerprinting in field-deployable and benchtop laboratory environments. Based on spontaneous Raman scattering—where monochromatic 785 nm laser light interacts with molecular vibrational modes—the system captures inelastic scattering shifts to generate chemically specific spectral signatures between 100 cm⁻¹ and 3600 cm⁻¹. This spectral window encompasses key functional group vibrations (e.g., C–H stretch at ~2900 cm⁻¹, C=O stretch at ~1700 cm⁻¹, ring breathing modes of aromatics at ~1000–1600 cm⁻¹), enabling unambiguous identification and quantification of organic compounds, polymorphs, excipients, and contaminants. The system’s architecture integrates three core subsystems: a thermally stabilized 785 nm diode laser with built-in safety interlocks and OD6+ laser protection optics; a fiber-coupled Raman probe featuring optimized notch filtering, beam collimation, and high-throughput collection optics; and a TEC-cooled back-illuminated CCD spectrometer platform selected for low dark current and high quantum efficiency in the 788–1100 nm detection range (corresponding to Raman shifts up to 3600 cm⁻¹). Unlike generic OEM spectrometers, each AvaRaman Bundle is pre-aligned, factory-validated for wavelength accuracy ( 0.999 over 3 orders of magnitude), and delivered with NIST-traceable calibration certificates.

Key Features

• Integrated 785 nm laser source with active wavelength stabilization and Class 1 laser safety certification (IEC 60825-1:2014) when used with included probe and eyewear
• Optimized Raman probe featuring ultra-steep-edge notch filters (OD > 6 at laser line, < 0.1% out-of-band rejection), achromatic focusing optics, and adjustable working distance (2–10 mm)
• Two spectrometer options: AvaSpec-ULS2048x64TEC-EVO-RS (6 cm⁻¹ resolution, 150–3600 cm⁻¹ range) and AvaSpec-ULS2048CL-EVO-RS (same resolution and range, enhanced UV-VIS-NIR sensitivity via DCL-UV/VIS200 optics)
• Modular slit design (25 µm standard) supporting resolution/sensitivity trade-off optimization without hardware modification
• FC/PC fiber interface enabling rapid probe interchangeability and compatibility with third-party sampling accessories (e.g., immersion probes, micro-sampling stages, flow cells)
• Real-time spectral acquisition at up to 10 Hz frame rate with on-board dark subtraction and cosmic ray rejection algorithms

Sample Compatibility & Compliance

The AvaRaman Bundles supports direct analysis of solids, powders, gels, liquids, and thin films without sample preparation. Its non-destructive, non-contact measurement modality meets ISO 8510-2 (Raman spectroscopy — terminology and definitions) and ASTM E1840 (Standard Guide for Raman Shift Standards) requirements. For regulated environments, the system complies with GLP and GMP principles: Panorama-Light software includes 21 CFR Part 11-compliant audit trails, electronic signatures, role-based user permissions, and immutable data archiving. All spectral data are stored in vendor-neutral HDF5 format with embedded metadata (timestamp, laser power, integration time, calibration ID), ensuring traceability per ICH M7 and USP . The optical path is sealed against dust and humidity (IP54-rated enclosure), validated for operation in ambient temperatures from 15°C to 30°C and relative humidity ≤ 70% non-condensing.

Software & Data Management

Panorama-Light serves as the unified analytical engine, providing instrument control, real-time spectral visualization, and advanced chemometric tools. Its AvaRaman module delivers baseline correction (asymmetric least squares), peak deconvolution (Gaussian/Lorentzian fitting), and spectral library matching using Euclidean distance and correlation coefficient algorithms. Users can build custom reference libraries with configurable metadata fields (CAS number, batch ID, synthesis method). All raw and processed spectra are indexed in a SQLite-backed database supporting Boolean search (e.g., “carbonyl AND polymer AND crystalline”), spectral subtraction, and PCA-based clustering. Data export supports CSV, ASCII, JCAMP-DX, and Andor SIF formats. Remote monitoring and script-driven automation (via Python API) enable integration into LIMS and automated QA/QC workflows.

Applications

• Pharmaceutical: Polymorph screening of APIs, counterfeit drug detection, excipient compatibility studies, and in-process monitoring of lyophilization endpoints
• Materials Science: Carbon nanotube chirality assignment, graphene layer counting, stress/strain mapping in composites, and catalyst surface speciation
• Forensics: Identification of illicit drugs, explosives residues, inks, and pigments with sub-milligram sample requirements
• Academic Research: Time-resolved Raman kinetics, surface-enhanced Raman spectroscopy (SERS) substrate characterization, and in situ electrochemical Raman cell studies
• Quality Control: Raw material verification against pharmacopeial monographs (USP , EP 2.2.48), coating thickness estimation, and batch release testing

FAQ

What laser safety class does the AvaLaser785 probe operate under?

The integrated 785 nm laser system is certified Class 1 when operated with the supplied probe and safety eyewear, eliminating the need for dedicated laser-controlled areas per IEC 60825-1.
Can the spectral resolution be adjusted post-purchase?

Resolution is determined by grating selection and slit width; while the standard 25 µm slit is fixed per bundle configuration, optional slits (10 µm, 50 µm) can be ordered separately and installed by authorized service personnel.
Is the system compatible with fiber-optic probes from other manufacturers?

Yes—the FC/PC interface ensures mechanical and optical compatibility with industry-standard Raman probes; however, optimal performance (e.g., rejection ratio, throughput) is guaranteed only with Avantes-qualified probes.
How is wavelength calibration maintained over time?

Each spectrometer undergoes multi-point neon-argon lamp calibration at the factory; users may perform routine validation using the included NIST-traceable polystyrene standard (Raman shift at 1003 cm⁻¹), with automated recalibration supported in Panorama-Light.
Does the software support multivariate analysis (MVA) for classification?

Yes—Panorama-Light includes PLS-DA and SVM classifiers with cross-validation, model persistence (.pkl export), and confusion matrix reporting, fully compliant with ASTM E1655-22 for predictive model development.