The AvaLight-DH-S is a powerful deuterium halogen source, but, like any unbalanced deuterium halogen source, it does have a very dominant alpha peak at 656 nm. This is why Avantes developed the DH-S-BAL, in which this peak is drastically reduced by a dichroic filter. This means less power, but an increase in the dynamic range of a factor 20.

The light source delivers a continuous spectrum with high efficiency. The highest stability is in the ultraviolet, visible and near-infrared range, from 215 to 2500 nm. An integrated TTL-shutter and filter holder for filters of up to 50 x 50 x 5.0 mm are included. The TTL-shutter can be controlled from any AvaSpec spectrometer, which means the auto-save-dark option in AvaSoft software can be used (please note: IC-DB26-2 cable is needed). 

Connection to the fibre is done through an SMA-905 connector, which features an adjustable focusing lens assembly. This ensures you have the maximum possible power into your fibre. For all deuterium light sources, solarization-resistant fibres (-SR) are recommended (see the fibre-optic section of this catalogue). The output of the AvaLight-DH-S-BAL is optimized for fibres or bundles up to 1500 µm.

The filter holder can be easily replaced by a direct-attach cuvette holder CUV-DA-DHS (see section accessories) useful for fluorescence or absorbance measurements.


  • Balanced light source
  • Broad spectrum: 215-2500 nm
  • Integrated TTL shutter
  • High efficiency
  • Increased dynamic range

Product Information

Balanced Deuterium (Standard) Balanced Halogen Lamp
Wavelength range 215-500 nm 500-2500 nm
Warm-up time 30 min 20 min
Lamp power 78W/0.75A 5W/0.5A
Lamp lifetime 2000 hrs 1000 hrs
Noise (AU) 2×10-5 10-4
Max. drift ± 0.5%/hr ± 0.1%/hr
Color temperature N.a. 3000 K
Optical power in 200 µm fiber 6 µW 17 µW
Optical power in 600 µm fiber 33 µW 160 µW
Optical power in 1000 µm fiber 90 µW 448 µW
Power consumption 90 Watt (190 Watt for heating D-lamp 4-5 sec) 90 Watt (190 Watt for heating D-lamp 4-5 sec)
Power requirements 100-240 VAC 50/60 Hz 100-240 VAC 50/60 Hz
Dimensions, weight 315 x 165 x 140 mm, ca. 5 kg 315 x 165 x 140 mm, ca. 5 kg
AvaLight-D-S-BAL Balanced Deuterium Light source, 215-500 nm, incl. TTL shutter, -SR fibers needed
AvaLight-DH-S-BAL Balanced Deuterium-Halogen Light source, 215-2500 nm, incl. TTL shutter, -SR fibers needed
IC-DB26-2 Interface cable AvaSpec-USB2 platform to AvaLight-D(H)S-BAL
AvaLight-D-B Replacement deuterium bulb for AvaLight-D/AvaLight DH-BAL light source, 2000 hrs
AvaLight-DH-B Replacement halogen bulb for AvaLight-DH-BAL light source
CUV-DA-DHS Direct-attach cuvette holder for AvaLight-D(H)S-BAL