In this post, we are focusing on Raman spectroscopy, which is a molecular spectroscopic technique providing information about molecular vibrations that can be used for sample identification and quantitation.
Raman spectroscopy has some very unique advantages and is used in many different fields where a non-destructive, microscopic, chemical analysis and imaging is required. This is especially ideal for the pharmaceutical industry where this technique is used for incoming raw material inspection as well as for final quality inspection of tablets.
You can find more information about Raman and the different products Ibsen Photonics offers for Raman on our website.
What is Raman Spectroscopy?
Raman spectroscopy can be used to rapidly characterize the chemical composition and structure of a sample, whether solid, liquid, gas, gel, slurry or powder. This vibrational spectroscopic technique relies on inelastic scattering of monochromatic light (usually from a laser in the visible, near infrared, or near ultraviolet range) in molecular structures.
The incident laser light changes the excitation states of the molecules, resulting in the energy of the laser photons being shifted up or down. The shift in energy gives information about the vibrational modes since the molecules will emit light at higher and/or lower wavelengths relative to the excitation wavelength (called Stokes or Anti-Stokes shifts).
Each material has its own specific Raman fingerprint. Raman scattering can, therefore, be used to identify and quantify the presence and composition of various substances in different forms without any damage.
Our Raman Spectrometer Offerings
Ibsen has a number of OEM spectrometer platforms that are well suited for integration into your Raman system due to our high optical throughput and thermal stability. The benefits are accomplished through our high diffraction efficiency transmission gratings and the thermal stability and robustness of our modules.
Our high-throughput option is called EAGLE Raman-S, the mid-range solution is the EAGLE Raman SWNIR and last but not least, we offer an ultra-compact FREEDOM mini Raman ideal for handheld applications.
|Excitation||High Throughput||High Resolution||Ultra Compact|
200 - 3650
600 - 2500
|FREEDOM HR VIS-NIR
"0" - 3650
"0" - 2960
"0" - 1800
|FREEDOM HR VIS-NIR
"0" - 2950
|FREEDOM HR VIS
"0" - 9700
Click here to see an example of Raman spectra obtained with one of Ibsen’s OEM spectrometers.
Our Raman Spectrometer Grating
Spectrometer Grating for 785-1100 nm
One of the newest additions to our broad portfolio of gratings for telecom, laser and spectroscopy applications is a grating specifically for Raman spectroscopy – suitable for both 785 and 830 nm excitation laser wavelengths.
With more than 80% efficiency over the 785-1065 nm wavelength range, the grating enables unbeatably high throughput for a broadband spectrometer built around this grating.
This performance is achieved by a combination of Ibsen’s advanced grating design capabilities with proprietary Holostepper™ patterning, which provides high resolution, high efficiency, low noise gratings. The 785-1100 nm Raman grating is available from stock, while Raman gratings for other excitation wavelengths can be provided on a custom basis.
As always, don’t hesitate to contact us for discussions on your requirements or to set up a meeting.
Finally, we want to wish you a Happy Thanksgiving Day. We hope you have a great holiday with your families filled with joy & happiness. Everyone at Ibsen wants to thank you and show you our appreciation for your business, trust, and loyalty with us!