The LCM-S-111 series from Laser 2000 are single longitudinal mode
lasers emitting at 532nm and are suitable for Raman spectroscopy, laser
microscopy (LSCM, MPLSM), interference measurements, spectral analysis,
flow cytometry, holography and laser-assisted measurements.
More to the point, they are relatively low cost for the performance they provide:
When looking for a laser for Raman spectroscopy, the first
consideration is the linewidth. An SLM laser with narrow linewidth
allows any signal wavelengths close to the laser line to be resolved .
The LCM-S-111 model has such a suitable linewidth, of 0.00001nm. This
corresponds to a coherence length of over 50m, hence holography is
another potential application.
Modification LCM-S-111-R has been specially developed for Raman
spectroscopy. An extra technical solution means that back reflection
hitting the output laser aperture does not have an influence on the
output power stability, which is advantageous when making measurements
over time. This feature also reduces the level of optical noise under
Although the beam quality is not necessarily of importance when
considering a laser for Raman spectroscopy, a good beam quality is
important for applications where the laser is coupled into fibre, such
as in confocal microscopy. These lasers have TEM00, M² < 1.2
The LCM-S-111 is available with a range of beam diameters and focal
positions, which allows you to choose a beam that is easier to
manipulate in your set-up. Physically, it has a small size to fit into
instruments. The operating temperature range is also very good at
In all, the LCM-S-111 series offer substantial value for money and are
a good option for applications such as Raman spectroscopy.
For more on this series, see http://www.laser2000.co.uk/