532nm laser excitation is a common wavelength chosen for Raman spectroscopy. This is because the Raman scattering efficiency in this region is very high. Green lasers typically can be good for metal oxides, minerals, or other inorganic materials and resonance Raman experiments (e.g. for carbon nanotubes and other carbon materials). Since scattering efficiency is high, there is less need for high power excitation which could possibly burn darker samples. Also, spectrometers configured for 532nm Raman can cover a wider wavenumber shift such as 200-5.250 cm-1 which allows you to see valuable information such as -NH and -OH functional groups found at 2.800 and 3.700cm-1 respectively.
-Raman-HR-TEC-532 Spectrometers: are our most popular 532 Raman spectrometers and include an enhanced CCD array detector tuned for 532nm Raman with advanced detector lens assembly for ultra sensitivity at long exposure times.
-Raman-ER-TEC-532 Spectrometers: extended range Raman spectrometers include an enhanced CCD array detector tuned for 532nm Raman with advanced detector lens assembly for ultra sensitivity at long exposure times.
-Raman-HR-TEC-X2-532 Spectrometers: offer 2-stage detector cooling for ultimate sensitivity and performance. Great for long exposures up to 8 minutes.
Raman-SR spectrometers: are typically recommended for OEM and portable applications where the specific sample set is known and works well without detector cooling.
As always with StellarNet instrumentation, the fiber optically coupled Raman spectrometer series is extremely ruggedized and compact for portable and field applications.
|Raman Spectrometer||Wavelength Range|
|Resolution (cm-1)||Integrated 1-Stage TE Cooler||TEC-X2 Option|
ER = Extended Range
HR = High Resolution
SR = Standard Resolution
Specifications for StellarNet Raman Configured Spectrometers
|Optical Resolution:||HR= 5 cm-1|
ER = 9 cm-1
SR = 15 cm-1
|Spectral Range:||HR = 200-3.100 cm-1|
ER= 200-5.250 cm-1
SR= 200-5.250 cm-1
Early Start Available
|Diffraction Gratings:||2400/1200 g/mm with gold surface|
Detector & Electronics
|Detector Type:||SONY ILX CCD |
14um x 200um
|Detector Lens:||Advanced cylindrical lens assembly|
|Thermo Electric Cooling:||1 Stage = -15 Deg C|
2 Stage = -30 Deg C
|Exposure Times:||- 20s without TEC|
- 60s with TEC
- 8 minutes with TEC-X2!
|Signal to Noise:||>1000:1|
@ Exposure time above 30s TEC 1 has >50% noise reduction and TEC-X2 has >80%
HR/ER= 6 x 17 x 15.5 cm
SR = 2.5 x 7.6 x 12.7cm
|Weight:||HR= 1.5 kg|
SR= 14 ounces
Software & Interface
|Operating System:||Win XP, 7,8,10|
(Wifi & Webserver Options)
|Software:||SpectraWiz, SpectraWiz-ID, LabView, Spectroscopy Pro-tools, Delphi, C, C#|
Interchangeable Slits Upgrades: are available for “HR” optical benches to allow more application flexibility. High Scattering samples can be measured with the smallest slit for highest resolution and weak Raman can be measure with a larger slit to allow for increased light throughput.
Raman-Probe-532: Attaches to 532nm laser via FC/APC and spectrometer via SMA 905, has integrated Raman filters and optics (working distance– 4.5mm), high efficiency collection fibers for StellarNet Raman spectrometers
Raman-Probe-TIP: attachements tips can be purchased for additional working distance options. Just screw on to replace
Raman-Probe-TIP-Tele: Telescoping Raman probe tip lens assembly attachment for 3cm working distance. Designed to by mounted on to standard Raman probe with 5mm working distance
RPH4: Raman Probe Holder block supports 1/2″ vials.
RPH5: Vertical Raman Probe Holder Block for powder and solids. Samples are placed onto a slide and inserted into the measurement chamber of the block. Includes a laser safety interlock which only allows the laser to fire when the probe is securely seated into the holder.
Raman-Probe-HT: High Temperature Raman probe to 200 deg C
Raman-Probe-Immersion: Immersion Raman Probes for 532nm source. Stainless-steel, cylindrical probe head with removable immersion sleeve, overall dimensions 5/8″ (15.8mm) diameter x 8″ (230 mm) length
Raman-Probe-Process: Raman Process Probe for 532nm source. Stainless-steel pressure sleeve specified to 3000 psi and up to 500ºC. Sapphire window and gold seal are resistant to many corrosive chemical environments.