Spectrometer Design Principles: Enhancing Raman Spectroscopy for Advanced Applications

Apr 17, 2024
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About This Webinar
Raman spectroscopy, a technique predicted in 1923 and discovered in 1928, has revolutionized scientists’ understanding of the molecular world by measuring and quantifying vibrational frequencies. As a non-destructive testing (NDT) method, it is invaluable across various sectors, including pharmaceuticals, biomedicine, petrochemicals, and food quality control. Despite its widespread use, a primary challenge remains: the inherently weak signal from Stokes-Raman scattering. Enhancing this signal typically requires either more powerful lasers or extended collection times, but practical limitations often necessitate highly sensitive optical spectrometers.

This talk explores the foundational principles behind the design and manufacturing of optical spectrometers for Raman spectroscopy and similar low-light applications. Sterobo addresses various design approaches, comparing conventional reflective gratings against alternatives like volume phase holographic (VPH) and surface-relief transmission (SRT) gratings. His discussion also highlights strategies for optimizing spectrometer performance, taking into account the entire Raman system design, from light source to detector.

The journey through spectrometer design culminates in understanding how these elements integrate to create a device that not only meets the required performance criteria but also ensures stability and reliability. By embracing innovative design principles and technologies, scientists continue to push the boundaries of what is possible in Raman spectroscopy, opening doors to new discoveries and advancements in multiple fields.

*** This presentation premiered during the 2024 Photonics Spectra Raman Spectroscopy Summit. For more information on Photonics Media conferences and summits, visit

About the presenter

Rasmus SteroboRasmus B. Sterobo is an OEM spectrometer application specialist at Ibsen Photonics. He has experience in optical engineering, data conditioning, and implementing OEM spectrometers in high-performance optical devices. He has worked with an array of different spectrometer-based topics including absorbance spectroscopy, LIBS, Raman, fluorescence, and spectral domain OCT. His background is as an engineer of applied physics, with a specialization in optics and nanotechnology.

Sterobo’s day-to-day work involves fourth-level support of Ibsen Photonics' customers, product management, design review, root cause analysis, writing software code, and fabricating technical product documentation.
Lasersspectroscopyspectrometer designsurface relief gratingsvolume phase holographic (VPH) gratingsRaman spectroscopy
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