Benchtop 785nm Raman spectrometer: Fluorescence-free molecular analysis and high modularity

The GoyaLab 785 nm Raman Spectrometer is a compact and modular laboratory instrument specifically designed for the spectral analysis of organic compounds, polymers, resins, and complex matrices. By utilizing a near-infrared excitation wavelength at 785 nm, it effectively eliminates parasitic background fluorescence that typically obscures Raman signals on real-world industrial samples.

Offered with a choice of a single-mode (100 mW) laser source for high spatial resolution micro-spectroscopy or a multimode (300 mW) laser for macroscopic bulk sampling of powders and liquids. The instrument is built around a micrometric “3D-Stand” (Class 1 safety), a dedicated vial holder, or a remote interlocked fiber probe.

Optical Architecture Highlights & Laser Options

Targeted 785 nm laser excitation tailored to your field:
- 100 mW Single-mode laser: Highly coherent and narrow beam, preferred for micro-spectroscopy on the 3D-Stand with 40x and 60x objectives, analyzing micrometric inclusions, local stress, and single fibers.
- 300 mW Multimode laser: Expanded sampling spot maximizing photon collection volume, ideal for heterogeneous powders, granules, turbid liquids, and through-packaging/vial analysis without thermal degradation risks.
- Fine power adjustment: Dynamic control adjustable from 10% to 100% in 1% steps via SpectroLab software.
Radical fluorescence suppression: Selecting 785 nm drastically minimizes the electronic transitions responsible for fluorescent emission, ensuring usable spectra even on raw, colored, or additive-rich matrices.
Raman shift range 150 – 3,200 cm^-1: Comprehensive analytical window covering the fingerprint region (150 to 1,800 cm^-1) and the C-H, O-H, and N-H stretching region (2,800 to 3,200 cm^-1). (Customizable range based on requirements).
Modular entrance slit & fine resolution: Optical resolution of 10 cm^-1 with the standard 25 µm slit, customizable with a 15 µm slit for enhanced spectral separation.
High-definition optical sensor & water-cooled option:
- Standard: High-resolution color Sony IMX676 2D CMOS sensor with low background noise.
- Research / Low-Signal Option: Scientific water-cooled sCMOS sensor, dedicated to prolonged exposure times for extracting ultra-weak bands.
Certified laser safety:
- Class 1 (total eye safety): Direct use in shared laboratory environments without safety goggles, thanks to the hardware interlock on the enclosed “3D-Stand” and the vial holder.
- Class 3B: Open configuration without 3D-Stand for optical benches or custom integration.
Polystyrene reference auto-calibration: Immediate validation and calibration procedure in SpectroLab using the certified bands of Polystyrene (included with the instrument).

Industrial applications & Use cases

By neutralizing parasitic fluorescence, the 785 nm Raman is the ideal tool for identifying synthetic, organic, and industrial compounds:

Fine chemistry, resins & industrial polymers:
- Filled plastics identification: Rapid characterization of colored commercial polymers or those containing additives, plasticizers, and stabilizers.
- Cross-linking monitoring: Monomer conversion rate control during epoxy, polyurethane, or acrylic polymerizations.
- Solvents & reagents: Purity control and incoming inspection without opening glass vials.
Security, forensics & customs:
- Narcotics and illicit substances: Non-destructive detection and authentication of suspicious powders, synthetic drugs, and cutting agents through transparent plastic bags or glass vials.
- Hazardous materials & explosives: Safe identification of chemical precursors and energetic powders without direct contact.
Food & beverage, oils & complex liquids:
- Vegetable oil authentication: Adulteration detection (e.g., extra-virgin olive oil cut with seed oils), fatty acid unsaturation profiling.
- Beverages, alcohols, and syrups: Sugar quantification, ethanol dosing, and counterfeit spirit identification.
Higher education & academic research:
- Practical teaching benches in molecular spectroscopy, organic chemistry, and materials science.
- Total Class 1 safety and operational robustness suited for intensive student use.

Optical & Electronic specifications

Parameter	Specification
Excitation laser wavelength	785 nm (wavelength stabilized)
Laser configuration options	100 mW Single-Mode or 300 mW Multimode
Laser power adjustment	Adjustable from 10% to 100% in 1% steps
Raman Shift spectral range	150 – 3,200 cm^-1 (customizable upon request)
Edge cut-off filter	150 cm^-1
Spectral resolution (FWHM)	10 cm^-1 (standard 25 µm slit) \| Optional 15 µm slit
Numerical Aperture (NA)	0.2
Standard optical sensor	Color Sony 2D CMOS (IMX676)
Optional optical sensor	Scientific water-cooled sCMOS
Standard objective	MPLAN 10x (interchangeable to 40x and 60x)
Targeting & imaging system	Beam splitter slider with optional color targeting camera
“3D-Stand” base	Micrometric X-Y movement, millimetric and micrometric Z adjustment
Vial holder module	Standard borosilicate vials Ø 10 mm inner diameter with Class 1 safety
Laser safety classification	Class 1 (on 3D-Stand or vial holder) / Class 3B (without 3D-Stand/vial holder)
Connectivity	High-Speed USB & hardware interlock loop

Sampling modularity & Accessories

High-precision “3D-Stand” analytical stand: Micrometric X-Y control for scanning solid samples and dual Z control (rapid approach + fine micrometric focusing).
Interchangeable microscopy objectives:
- 10x MPLAN objective mounted as standard for versatile use.
- Optional 40x and 60x objectives to focus the laser spot down to ~1 µm (in single-mode configuration) to target fibers, multilayers, or micro-crystals.
Optical slider & contextual targeting camera: Retractable beam splitter system with a dedicated digital camera to visually monitor the surface and the laser impact point in SpectroLab.
Secure vial holder compartment: Adapter designed for Ø 10 mm inner diameter borosilicate glass vials, with automatic beam shut-off upon opening (Class 1).
Remote fiber Raman probe: In situ measurement inside reactors or over bulky materials, equipped with a safety hardware interlock loop.

SpectroLab data processing & Spectral libraries

SpectroLab Software (Included, free, unlimited license):
- Comprehensive suite of mathematical pre-processing: Cosmic ray removal (despiking), noise filtering (Savitzky-Golay, denoising), and automatic baseline subtraction (AsPLS asymmetric algorithms, polynomial correction).
- Auto-calibration procedure: Immediate spectral scale adjustment with one click on the Polystyrene reference spectrum.
- Open data formats: Universal exports (.spc, .txt, .xlsx, .csv).
ST Japan & KnowItAll® database compatibility: Automatic spectral similarity search for the rapid identification of unknown polymers, narcotics, solvents, and organic compounds.
Expert / Capture Chemometrics Suite (Option): Multivariate statistical classification (PCA) for segregating raw material batches or detecting formulation anomalies.

💡 Evaluate the power of 785 nm Raman on your samples

Would you like to test fluorescence suppression on your polymers, oils, or resins, or determine the ideal laser option (100 mW single-mode vs. 300 mW multimode)?
👉 Contact our Raman spectroscopy specialists