TopWave 229

Industrial CW Laser for DUV Raman

  • 10 mW @ 229 nm
  • Narrow laser linewidth (< 1 MHz ≙ < 4 x 10-5  cm -1 )
  • Diffraction limited beam quality (M² < 1.3)
  • User-friendly, turnkey system
  • Excellent lifetime (> 10000 h)

The TopWave 229 is an exciting new choice for deep UV spectroscopists looking for an easy to use and reliable laser that enables the user to focus on their application rather than worrying about the light source. With its short wavelength and an ultra-narrow laser linewidth (< 1 MHz ≙ < 4 x 10-5 cm-1), the TopWave 229 provides the key features to take on an important role as excitation source in the field of deep UV Raman and deep UV fluorescence spectroscopy.

Excitation below 250 nm is crucial for fluorescence-free Raman, as this avoids the overlap between the spectral regions of the Raman signal and the native fluorescence. Compared to fluorescence, the Raman effect is orders of magnitude weaker, so that even minimal fluorescence is sufficient to mask Raman emission. Fluorescence spectroscopy also benefits from the 228.5 nm emission, because it allows the detection of molecules with fluorescence spectra in the range ≤ 270 nm, which can only be excited with shorter wavelength light. As a CW laser system, the TopWave 229 offers another advantage: it avoids non-linear and saturations problems common with pulsed laser sources.

The compact footprint and low heat dissipation of the TopWave 229 laser head allow for easy integration in space restricted and temperature sensitive application environments. Comfortable, hands-off operation over the system lifetime (typ. 10,000 hrs) is ensured by fully automated optimization routines for the internal opto-mechanics. In order to provide best reliability and consistent, diffraction limited beam quality (M² < 1.3), the complete UV beam path is enclosed in a specially sealed compartment.

With its state-of-the-art laser controller the TopWave 229 offers a wide range of options for operation. While laboratory users might prefer the controller's easy to use touchscreen interface or the TOPAS PC GUI, system integrators will appreciate the comprehensive command language that enables smooth integration with central control software.

  • Specification

    Laser Specifications TopWave 229
    Output power 10 mW
    Wavelength 228.5 nm ± 0.5 nm
    Linewidth < 1 MHz

    Beam waist diameter @ 1m (1/e²) 0.4 mm ± 0.2 mm
    Beam divergence (full-angle) < 1.2 mrad
    Ellipticity 0.9 - 1.1
    Beam pointing stability (1) < ± 5 µrad
    Transverse Mode TEM00
    M² x < 1.3, M² y < 1.3
    Polarization linear, vertical < ± 3°
    Polarization extinction ratio > 200 : 1
    Power stability < 2 % over 8 h
    RMS noise < 1 % (10 Hz - 10 MHz)
    Lifetime(2) (min. / typ.) 5,000 h / 10,000 h
    Utility and Environmental Specifications
    Laser head dimensions 135 x 295 x 470 mm³ (H x W x D)
    Control unit dimensions 154 x 378 x 448 mm³ (H x W x D)
    Umbilical length 2 m
    Temperature range
    Operating 20 °C to 30 °C, stabilized to ± 1 °C, non-condensing
    Storage & shipping -10 to + 50 °C, non-condensing
    Cooling requirements
    Laser head Conduction(3)
    Control unit Air-cooled
    Line voltage AC 100-240 V 50 / 60 Hz
    Power consumption < 250 W (typ. < 120 W)
    Communication interface Ethernet, USB

    (1) RMS over 8h @ ambient temperature drift less than ± 1 K
    (2) With optics shifts
    (3) Sufficient heat sink has to be provided. Optional cooling plate with closed loop chiller available upon request

  • Applications
    • DUV Raman
    • DUV Native Fluorescence
    • Protein detection
    • Photoluminescence (PL)
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