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DPSS Lasers for Fluorescence and Photoluminescence

What is photoluminescence?

Photoluminescence is the phenomenon where a material emits light after absorbing light. The material first absorbs light, typically in the form of photons (packets of energy). This absorption excites the electrons in the material, pushing them to a higher energy level. As the electrons relax back to their original state, they release energy in the form of light. This emitted light usually has a longer wavelength (lower energy) than the absorbed light.

Photoluminescence spectroscopy (PL) is a powerful technique that shines light on a material's secrets. It works by directing light at the sample, causing it to absorb the light energy and then emit its own light. By analysing this emitted light, we can gain valuable insights into the material's electronic and structural properties.

This non-destructive method offers a safe way to probe materials across various fields, including nanotechnology, semiconductors, and solar cell development.

The role of lasers in photoluminescence spectroscopy

Lasers play a crucial role in photoluminescence spectroscopy, a technique used to study the optical properties of materials. In photoluminescence, the material needs to absorb light to get excited. While various light sources can be used, lasers are a preferred choice due to their unique properties:


Lasers emit light of a single, well-defined wavelength. This allows for targeted excitation of specific energy levels within the material.

High Intensity

Lasers can deliver a concentrated beam of light with high intensity. This intense light can efficiently excite a larger number of electrons in the material, resulting in a stronger photoluminescence signal.

Spatial Coherence

The light from a laser is highly coherent, meaning the waves are all "in step" with each other. This allows for focused excitation on a specific area of the sample being studied.

Benefits of  Lasers

  • Selective Excitation: Target specific parts of the material's energy spectrum for a more precise analysis.

  • Enhanced Signal Strength: Generate a stronger photoluminescence signal for easier detection and analysis.

  • Improved Measurement Accuracy: Obtain more accurate information about the material's optical properties.

Photoluminescence & fluorescence applications

Skylark Lasers are prized for their long-term stability and power efficiency to support work across several PL and fluorescence applications:


  • Photoluminescence spectroscopy

  • PL materials characterisation

  • PL excitation of carbon nanotubes

  • Fluorescence imaging of aromatic amino acids

  • DNA quantitation

  • Single-molecule fluorescence spectroscopy

  • Fluorescence lifetime imaging microscopy (FLIM)

  • Photoluminescence lifetime imaging (PLIM)

  • Fluorescence-based sensing

  • Biomedical imaging

Skylark Lasers are built for PL

Our single frequency continuous wave laser sources offer unrivalled wavelength stability and narrow linewidth, resulting in higher spectral and spatial precision for fluorescence imaging. Both our visible lasers and our UV lasers provide high spectral and spatial precision for direct fluorescence imaging of aromatic amino acids and DNA quantitation. Our lasers are designed for integration into fluorescence imaging systems over a range of wavelengths within a small footprint.

  • Single frequency operation

  • Wavelength precision and stability

  • Narrow Linewidth

  • Beam quality


Let us tailor your perfect laser solution

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