UV lasers for Raman spectroscopy: 320 nm and 349 nm single frequency CW DPSS lasers

High power, ultra-stable single frequency UV lasers for Raman excitation

Looking for a UV laser for Raman spectroscopy? Skylark Lasers provides high power, single frequency CW excitation at 320 nm and 349 nm for UV Raman, micro-Raman, and advanced materials characterisation.

The Skylark 320 delivers up to 200 mW and is suited to Raman systems operating around the 325 nm region, including applications currently using HeCd lasers. The Skylark 349 delivers up to 400 mW and provides a solid-state alternative to 351 nm Argon ion excitation for UV Raman and materials characterisation across wide-bandgap semiconductors and other advanced materials.

Narrow linewidth, low noise, excellent beam quality and spectrally clean output provide stable, reproducible excitation while reducing the filtering, maintenance and system complexity associated with legacy gas lasers.

Narrow linewidth

≤ 13 kHz / 1 ms

Reduces spectral broadening, leading to sharper Raman peaks, better signal resolution, and SNR (signal-to-noise ratio).

Low noise

≤ 0.3% RMS

Delivers a stable baseline and consistent signal intensity, preventing laser noise from masking weak Raman features.

Clean beam

M² ≤ 1.1

Provides a pure TEM₀₀ mode with > 95% beam circularity for efficient, low noise propagation through optical paths.

Consistent wavelength

± 0.2 pm

Maintains ± 0.2 pm wavelength stability over 8 hours, ensuring consistent calibration and spectral integrity.

Achieve sharper spectra and shorter acquisition times with CW single frequency Skylark DPSS lasers

UV Raman and photoluminescence (PL)

Stimulated emission depletion microscopy (STED)

Surface enhanced Raman spectroscopy (SERS)

UV resonance Raman spectroscopy

Mechanobiology

Micro-Raman and confocal Raman microscopy

FAQS

Are Skylark UV DPSS lasers suitable for Raman spectroscopy?

What Raman applications are better suited to diode lasers?
Diode lasers can be an effective choice for routine Raman measurements where moderate wavelength drift, broader linewidth, or higher noise levels are acceptable. They’re often used in entry-level benchtop instruments, educational setups, and portable analyzers that prioritize compactness and cost over spectral precision. For applications demanding long-term wavelength stability, sub-MHz linewidth, or low relative intensity noise—such as UV Raman, SERS, micro-Raman, or process monitoring—a single-frequency DPSS laser provides significantly better spectral performance and reproducibility. Equally critical is spectral and power stability: even small fluctuations can cause baseline drift or Raman-shift misalignment over long measurements. Skylark UV lasers combine high optical power with low noise (≤ 0.3 % RMS) and exceptional wavelength stability, ensuring consistent excitation and reproducible spectra in both research and production systems.
Are Skylark UV lasers suitable for integration into OEM Raman systems?
Yes. Skylark UV lasers are designed for OEM and system integration, combining thermal stability, long term output stability, and spectrally clean single frequency output that reduces the need for additional mode filtering. This can simplify system design and improve measurement repeatability in Raman systems.
Can a 320 nm laser replace a 325 nm HeCd laser?
Yes. A 320 nm single frequency DPSS laser can replace a 325 nm HeCd laser in many UV Raman applications. For Raman users, the main advantages are higher available power, a compact solid-state platform, lower power consumption, and reduced maintenance compared with legacy HeCd systems. The Skylark 320 provides up to 200 mW of CW single frequency output with narrow linewidth, low noise and high beam quality.
Can a 349 nm laser replace a 351.1 nm Argon ion laser?
Yes. A 349 nm single frequency DPSS laser can replace a 351 nm Argon ion laser in many UV Raman applications where 400 mW provides sufficient output power. For Raman spectroscopy, a 349 nm DPSS source can provide high CW UV power with narrow linewidth, low noise, and spectrally clean output, while avoiding the high electrical power consumption, cooling requirements, and maintenance associated with legacy Argon-ion lasers.

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