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Raman spectroscopy uses laser light to probe the vibrational characteristics of molecules.
When the laser interacts with a sample, a small portion of the scattered light shifts in wavelength, providing information about the molecular composition and structure of the material.
Accurately measuring these Raman shifts requires a stable excitation source. Variations in laser output or wavelength can introduce uncertainty into high-resolution measurements, making precise control of both laser current and temperature an important part of the system design.
One Raman spectrometer uses a Wavelength Electronics WLD3343 or WLD33ND laser diode driver paired with a WTC3243 or WTC32ND temperature controller for complete laser control.
The WLD laser diode drivers provide up to 2.2 A of current with 200 ppm stability, supplying the well-defined drive current needed to maintain consistent laser operation. The WTC temperature controllers provide 0.0009°C temperature stability, helping minimize changes in laser characteristics caused by temperature fluctuations.
Together, precision current and temperature control help maintain a stable laser source for high-resolution Raman measurements, allowing researchers to focus on the spectral characteristics of the sample rather than variations in the excitation source.
Learn more about the WLD3343 Laser Diode Driver, WLD33ND Laser Diode Driver, WTC3243 Temperature Controller, and WTC32ND Temperature Controller.
