IndiGo fluo laser-532: a fluorescence spectrometer with a 532nm laser excitation

The IndiGo Fluo Laser 532 nm is a portable, standalone spectrofluorometer engineered for high-sensitivity detection and quantitative analysis of fluorophores, biomolecules, and advanced materials under coherent green excitation. Driven by a 100 mW single-mode 532 nm laser source delivering stabilized continuous-wave (CW) emission, it provides photon flux density and spectral purity far exceeding standard LED illumination, enabling trace-level detection down to the sub-ppm range.

Featuring a dual-stage high-rejection optical filtering architecture (laser clean-up filter and a 540 nm long-pass collection edge), an uninhibited detection range spanning 532 to 840 nm, interchangeable MPLAN microscope objectives, and Class 1 interlocked sampling enclosures, the IndiGo Fluo Laser 532 nm brings laboratory-grade precision directly into mobile, QA/QC, and field workflows.

Optical Architecture & 532 nm Laser Excitation Key Features

• Single-mode 532 nm laser excitation (100 mW): frequency-stabilized, single-mode CW laser diode delivering a narrow, coherent excitation beam. Laser power is fully adjustable step-by-step via SpectroLab software to optimize signal yield while preventing photobleaching.
• Dual-stage high-rejection spectral filtering:
  • 532 nm clean-up laser filter: positioned at the laser output to strip amplified spontaneous emission (ASE) and guarantee an ultra-pure excitation line.
  • Long-Pass (LP) 540 nm collection filter: sharp optical edge filter at the spectrometer slit entrance, blocking laser backscatter to acquire fluorescence emission right from the immediate vicinity of the excitation line.
• Useful spectral range (532 – 840 nm): continuous coverage optimized across the yellow, orange, red, and very near-infrared emission bands.
• Interchangeable MPLAN focusing objectives: fitted as standard with a high-grade metallurgical MPLAN 10x objective, swappable tool-free to a 4x (wide-field macroscopic collection) or a 60x (micrometric spot size for high power density).
• Configurable entrance slits & optical resolution:
  • 25 µm slit: maximum optical resolution < 1.5 nm (resolving narrow emission lines and fine multiplets).
  • 70 µm slit (Standard): resolution < 5.0 nm (balanced sensitivity and throughput for routine workflows).
  • 150 µm slit: resolution < 10 nm (maximum photon throughput for ultra-low quantum yield samples).
• Scientific CMOS detector options:
  • Sony IMX334 monochrome: 2D high-resolution CMOS sensor with ultra-low readout noise and high dynamic range for demanding quantitative fluorimetry.
  • ON Semi MT9M001: field-proven and cost-effective configuration for routine quality control and higher education.
• Certified operational laser safety:
  • Class 1 (total safety): eye-safe operation without protective eyewear when utilizing fully enclosed sample compartments with physical contact interlocks.
  • Class 3B: open sampling setups or direct optical bench integration.

Modular Sampling: From Vials to Bulk Solids

The IndiGo Fluo Laser 532 nm interfaces seamlessly with the comprehensive suite of IndiGo modular holders:

• Cylindrical vial holders: secure adapter for standard Ø 10 mm borosilicate glass vials and sampling tubes.
• Spectroscopy cuvette holders: accommodates standard 10 × 10 mm optical cuvettes (quartz, optical glass, or polystyrene).
• Powder, pellet & solid sample holders: dedicated cup adapter for surface evaluation of packed powders, compressed tablets, and bulk specimens.
• Custom adaptations: in-house engineering and rapid prototyping of bespoke sample fixtures tailored to your production or testing formats.

Key Applications & Analytical Fields

Laser excitation at 532 nm aligns with the absorption peaks of widely used fluorophores, biomolecules, and inorganic luminescent centers:

• Biotechnology, molecular biology & diagnostics:
  • Reference fluorophores: resonant excitation of Rhodamine dyes (Rhodamine B, Rhodamine 6G), Cyanine 3 (Cy3), Alexa Fluor 532 / 546, and propidium iodide.
  • Phycobiliproteins & biomarkers: sensitive quantification of B-phycoerythrin (B-PE) and R-phycoerythrin (R-PE) used in immunoassay diagnostics.
• Nanomaterials & quantum photonics:
  • Fluorescent nanodiamonds & NV centers: optical characterization of nitrogen-vacancy centers (NV⁰ at 575 nm and NV^– at 637 nm) for nanoscale thermometry, quantum sensing, and bio-tagging.
  • Quantum dots & phosphors: emission efficiency and stability monitoring for nanocrystals emitting in the yellow, orange, and deep red regions.
• Agri-food, edible oils & beverages:
  • Lipid oxidation & thermal stress: screening oil degradation and adulteration via laser-induced fluorescence of secondary oxidation products.
  • Beverage fingerprinting: spectral profiling of phenolic compounds and aging markers in premium spirits and wines.
• Mineralogy, geology & gemology:
  • Luminescent activators & rare earths: resolving characteristic emission signatures from chromium (Cr³⁺), samarium (Sm³⁺), and europium (Eu³⁺) in spinels, rubies, and activated calcites.

Technical Specifications

SpectroLab Software Ecosystem & Chemometrics

• SpectroLab (Included, free, unlimited license): real-time laser power control, live spectral display from 532 to 840 nm, dark subtraction, peak area integration, and standard data export formats (.xlsx, .csv, .txt, .spc).
• Expert / Capture chemometrics suite (Option): multivariate statistical classification (PCA) for origin tracing or sample sorting, and PLS regression models for precise fluorophore quantification in complex mixtures.

💡 Evaluate 532 nm Laser Fluorescence on Your Samples

Looking to detect a specific fluorophore (Rhodamines, PE), characterize nanodiamonds, or design a custom sampling fixture for your line?

👉 Contact our application engineering team for a demonstration or feasibility study

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