Affa RS – TEC Cooled Raman Spectrometer

Designed and assembled in Europe
Engineered by physicists
Dedicated technical support available

The Affa RS is a research-grade TEC-cooled Raman spectrometer engineered for high-sensitivity, low-noise, and reproducible Raman measurements in advanced laboratory environments.

By combining active detector cooling, stabilized excitation, and precision optical alignment, the system enables reliable acquisition of weak Raman signals while maintaining long-term spectral stability.

The Affa RS is designed for academic research, materials characterization, and laboratory-based analytical applications requiring consistent and quantitative Raman performance.

Advanced Detector and Active Cooling

The Affa RS integrates a high-sensitivity linear CMOS detector combined with a single-stage Thermo-Electric Cooling (TEC) system.

The detector is thermally stabilized at approximately 2 °C (up to 30 °C below ambient temperature), significantly reducing thermal noise and dark current.

This ensures:

• Stable long integration times
• High signal-to-noise ratio (>1000:1 without averaging)
• Enhanced detection of weak Raman signals
• Reproducible measurements over extended acquisition sessions

Thermal stabilization is essential for quantitative Raman spectroscopy and low-intensity sample analysis.

High-Precision Optical Architecture

The optical path of the Affa RS is optimized to minimize stray light and maintain spectral accuracy.

Carefully aligned components and a stabilized excitation path provide:

• High spectral resolution
• Reduced background interference
• Stable peak positioning
• Consistent measurement reproducibility

This architecture supports demanding research applications in materials science, chemistry, nanotechnology, and advanced laboratory environments.

Configurable Excitation Options

The Affa RS is available with:

• 532 nm excitation (high Raman scattering efficiency), power variable up to 200mW.
• 785 nm excitation (reduced fluorescence for complex or biological samples), power variable up to 500mW.

This flexibility allows adaptation to diverse experimental requirements and sample types.

Representative Raman Spectra

The spectra below were acquired using the Affa RS TEC cooled Raman spectrometer under laboratory conditions, demonstrating stable peak positioning, high signal-to-noise ratio, and reliable molecular identification performance.

Raman spectrum of paracetamol acquired with 785 nm excitation and 1000 ms integration time using the Affa RS.

Raman spectrum of Dentine acquired with 785 nm excitation and 4000 ms integration time using the Affa RS.

Raman spectrum of Polypropylene acquired with 785 nm excitation and 1000 ms integration time using the Affa RS.

Performance Highlights

• Detector cooling to ~-10 °C
• Signal-to-noise ratio >1000:1
• Spectral accuracy ±1–3 cm⁻¹
• Laser power stability <2% over 4 hours
• Designed for long integration stability

System Integration

The Affa RS integrates seamlessly with our Raman probes, fiber-coupled spectroscopy accessories, laboratory sample holders, and optical calibration standards.

It is fully compatible with other Thunder Optics spectrometers and spectroscopy accessories, enabling flexible laboratory configurations.

Fully compatible with Thunder Optics spectroscopy solutions.

Research Applications

Materials Science

Carbon materials, semiconductors, nanomaterials, thin films

Chemistry

Molecular identification, phase analysis, structural characterization

Pharmaceutical Research

Compound verification, polymorphism studies

Academic Research

Advanced spectroscopy training and laboratory education

 

The Affa RS delivers performance characteristics typically associated with significantly higher-cost research Raman platforms while maintaining a streamlined, laboratory-friendly architecture.