XWS are compact, easy-to-use, powerful and efficient tunable light sources, tunable in the spectral range from 190nm to 2500nm with continuously adjustable bandwidth.
XWS-Т150 and XWS-Т266 are developed based on new ultra-bright laser pumped plasma sources XWS-65 from “Isteq B.V.” and already established wide-aperture automated monochromators M150 and M266 produced by SolarLS.
Spectral power density of the XWS-M150 in 200-1100nm range.
(Monochromator М150 with diffraction gratings 1200 grooves/mm blazed at 250nm and 300 grooves/mm blazed at 500nm).
Such unique features as high power density in a wide spectral range, including the UV range of 190 nm, as well as long-term stability and long service life, make the XWS an essential and unprecedented device for metrological applications.
Modern laser-pumped plasma light sources XWS-65 have undeniable advantages over common discharge lamps: spectral brightness and spatial-temporal stability are several times higher, and lamp lifetime is an order of magnitude longer.
The choice of monochromator (compact M150 or high-resolving M266) allows optimizing optical power, spectral resolution, as well as the degree of automation and price range.
Both monochromators feature Imaging optics for astigmatism compensation. The M266 monochromator is fully automated, contains up to 4 diffraction gratings and has a focal length twice as high as of M150. Therefore, M266 provides twice better spectral resolution, or, for the selected spectral range, it allows to open the slit 2 times wider and thus increase the optical output power 4 times compared to M150.
The M150 monochromator is compact and wide-aperture; it can be supplied with 1, 2 or 3 diffraction gratings. For both monochromators, it is possible to supply either automated input and output slots, or a set of fixed-width slots with a manual shift.
The spectral characteristics of the tunable XWS-M150 and XWS-M266 light sources depend on the selected diffraction gratings (see the Specification).
APPLICATIONS
Tunable light source of the XWS series cover a large field of possible scientific, research and OEM applications:
| Tunable light source | XWS-Т150 | XWS-Т266 |
| Spectral range of operation | 190-2500 nm | |
| Monochromator model | M150 | M266 |
| Focal length of the monochromator | 142 mm | 284 mm |
| F/# | 1:3.6 | 1:3.8 |
| Light source | XWS-65 | |
| Spot size on the entrance slit of the monochromator | 500 µm | 500 µm |
| Optical output | — direct output through exit slit, — optical fiber output (output) — collimated output beam acquired with a 2-lens achromatic objective (option) |
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| Maximum output power | Up to 3 mW at 6nm output bandwidth (depends on the monochromator type and the selected grating) |
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| Spectral power density | Up to 60 µW/nm*mm2 | |
| Output bandwidth (FWHM) | 1 nm…180 nm 1) | 0.5 nm…90 nm 1) |
| Wavelength reproducibility | 0.02 nm – 0.1 nm (depends on the selected grating) |
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| Scanning speed | 16 nms – 300 nms (depends on the monochromator type and the selected grating) |
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| Filter wheel | — Automated 8-position filter wheel with 5 standard absorbing filters for the range 190-1620nm — Optional Si filter for the range 1000-2000 nm (filter transmits light up to 2500 nm) |
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| Interface type | USB | |
| Dimensions | XWS-M150: 458 x 292 x 220 mm XWS-M266: 530 x 490 x 250 mm |
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1) Depends on the monochromator type, selected grating and slits opening width
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