ResourceSpectroscopy

Choosing the Most Suitable Laser Wavelength for Your Raman Application

6 Oct 2014

Dispersive Raman spectroscopy has increasingly been implemented for material identification due to its portability and sampling flexibility. However, when choosing a Raman instrument, one of the primary concerns is the wavelength of the laser that is integrated into the Raman spectrometer system. This application note discusses how to select a laser excitation wavelength for specific applications, considering the most widely used wavelengths which are 532nm, 785nm and 1064nm.

i-Raman ‒ High Resolution TE Cooled Raman Spectrometer

B&W Tek, Inc.

The i-Raman® is unique for its high resolution combined with field-portability, with performance comparable to large bench-top Raman systems and weighing less than 7lbs The i-Raman® is equipped with B&W Tek’s patented CleanLaze® technology for exceptional laser stabilization and narrow linewidth. Other features include a spectral resolution as fine as 3cm-1, wide Raman shift coverage up to 4000cm-1, and a TE cooled 2048 pixel CCD array. With a convenient fiber optic interface, it can collect data to within 65cm-1 of the Rayleigh Line.It is unique for its high resolution combined with field-portability, with performance comparable to large bench-top Raman systems and weighing less than 7 lbs. The system’s small footprint, lightweight design, and low power consumption provides research grade Raman capabilities anywhere!The i-Raman offers 532nm, 785nm, and 830nm excitation wavelength options. All i-Raman systems feature deep TE Cooling, allowing the maximum effective integration to be 4 minutes. This makes the i-Raman ideal for demanding applications involving low concentrations and weak Raman scatterers.i-Raman ‒ High Resolution TE Cooled Raman Spectrometer Features: Patented CleanLaze® Technology for Laser Stabilization 175cm-1 of the Rayleigh Line (65cm-1 Option Available) Fiber Optic Interface for Convenient Sampling Spectral Resolution of 3cm-1 Wide Raman Shift Coverage TE Cooled 2048 Pixel Array

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NanoRam® Handheld Raman Spectrometer

B&W Tek, Inc.

The NanoRam® is the state-of-the-art compact handheld Raman analyzer designed for use by non-specialists, and easily operates single-handedly.It allows rapid development of libraries and methods for material identification and verification within cGMP compliant facilities, whether in the lab, the warehouse, the loading dock or the field. Raman spectroscopy is an approved method by US Pharmacopeia, European Pharmacopeia, Pharmacopeia of the People’s Republic of China and is a well-recognized method for compliance with the PICS GMP guide to provide 100% assurance of the identity of each container of starting material.The NanoRam is fully compliant with all governing regulations including 21 CFR Part 11 and Part 1040.10. B&W Tek offers a wide variety of services including assistance with method and/or new library development and other services such as support with IQ/OQ/PQ validation.NanoRam® Handheld Raman Spectrometer Features: Intuitive Software – a user-friendly tool for both technical & non-technical users to make their job easier Versatility – measure a variety of samples in a variety of environments and packaging with just one unit Data Reproducibility – superior hardware ensures that results are consistent and reliable Performance – robust multivariate algorithms guarantee accuracy when testing and identifying materials

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Choosing the Most Suitable Laser Wavelength for Your Raman Application