Lasers for Raman Spectroscopy

Description

Raman spectroscopy is a spectroscopic technique used to determine vibrational modes of molecules, as it is able to show the spectrum for the materials characteristic and identification. Raman spectrum solution requires lasers with narrow spectral bandwidth, high spectral purity, high level of wavelength stability and high efficiency. As a general guide, laser sources at the ultraviolet wavelength range are ideal for resonance Raman on bio-molecules, such as proteins, DNA and RNA, fluorescence suppression. Laser sources at the visible range are perfect for inorganic materials and resonance Raman experiments (e.g., for carbon nanotubes and other carbon materials) and surface enhanced Raman scattering (SERS). Near-infrared laser sources are ideal for fluorescence suppression and high output power. Dual wavelength laser source for Raman Spectroscopy may be available upon request. Lasermate provides different laser sources specifically designed for Raman spectroscopy applications at different kinds of wavelengths and power levels to meet customer’s practical requirements.

Specifications

RAM Series Fiber Coupled Narrow Linewidth Lasers (<0.06nm)
DPNU Series Narrow Linewidth Low Noise DPSS Lasers (<0.003nm)
SLM Series Single Longitudinal Mode Lasers (<0.00001nm)
DLNE Series Narrow Linewidth Diode Lasers (<0.03nm)

Documentation

Typical Ultraviolet Lasers for Raman Spectroscopy

Central Wavelength	Output Power	Typical Linewidth	Advantages
257 ± 0.3 nm	1-15mW	0.1	For resonance Raman on bio-molecules (such as proteins, DNA, and RNA), and fluorescence suppression.
261 ± 0.3 nm	1-5mW	0.1
320 ± 0.3 nm	1-20mW	0.1
360 ± 0.3 nm	1-200mW	0.00001

Typical Visible Lasers for Raman Spectroscopy

Central Wavelength	Output Power	Typical Linewidth	Advantages
405 ± 0.5 nm	1-100mW	0.03	For inorganic materials and resonance Raman experiments (e.g., for carbon nanotubes and other carbon materials) and surface enhanced Raman scattering (SERS).
457 ± 0.3 nm	1-2000mW	0.003 / 0.00001
473 ± 0.3 nm	1-500mW	0.003 / 0.00001
488 ± 0.5nm	1-150mW	0.03
514.5 ± 0.5 nm	1-30mW	0.03
532 ± 0.3 nm	1-10000mW	0.003 / 0.00001
633 ± 0.3 nm	1-100mW	0.03
660 ± 0.3 nm	1-200mW	0.03

Typical Infrared Lasers for Raman Spectroscopy

Central Wavelength	Output Power	Typical Linewidth	Advantages
785 ± 0.5 nm	1-450mW	0.06/ 0.03/ 0.0001	For fluorescence suppression, high output power.
808 ± 0.5 nm	1-450mW	0.03
830 ± 0.5 nm	1-450mW	0.03
980 ± 0.5 nm	1-450mW	0.03
1064 ± 0.3 nm	1-10000mW	0.00001