Letter to the Editor

Nov. 13, 2015
I just read Jeff Hecht's article in Laser Focus World titled "Spectrometers and Spectroscopy: Looking Back/Looking Forward: Spectrometers and spectroscopy get faster, better, and cheaper," and I thought the article was very well written and covered many of the key points in the evolution of miniature spectrometers.

I just read Jeff Hecht's article in Laser Focus World titled "Spectrometers and Spectroscopy: Looking Back/Looking Forward: Spectrometers and spectroscopy get faster, better, and cheaper," and I thought the article was very well written and covered many of the key points in the evolution of miniature spectrometers. I was also excited to see that he cited an article that I co-authored in LFW back in May 2013.

I think you left out one of the major milestones in the miniaturization of Raman spectrometers—the commercialization of the volume Bragg grating (VBG)-based external cavity diode laser by Innovative Photonic Solutions (IPS) in 2003. I know this statement may seem biased because I am currently employed by IPS, but I had been a customer of IPS for six years prior to joining the company in fall 2013, so I can speak with both perspectives. The reason why this laser was so important is it allowed systems integrators to have a compact, low-cost, and low-power-consumption excitation source that was wavelength- and power-stabilized over a wide ambient temperature range. This resulted in the IPS laser being used in most of the first-generation "handheld" Raman spectrometers. Since then, the VBG-stabilized diode laser has become the industry standard in Raman spectroscopy—in both handheld and laboratory systems.

A few years after the initial release of the VBG-based diode laser, IPS again revolutionized the world of handheld Raman when they came out with the first fully integrated, VBG-stabilized diode laser with a collimated output in a TO-56 package (see photo). This even further reduced the size and power consumption, allowing for the smartphone-size Raman spectrometers that now fit in the palm of your hand and run off AA batteries.

IPS has historically been really bad with PR and over the years, our sales have primarily been OEM and private label; therefore, outside of the Raman spectroscopy community, not too many people are aware of IPS's impact. I know it's too late to get any of this into the article, but I figured it couldn't hurt to fill the gap in the story.

Again, overall I really liked the article and I have already sent it to a few friends.

About the Author

Robert V. Chimenti | Director, RVC Photonics LLC

Robert V. Chimenti is the Director of RVC Photonics LLC (Pitman, NJ), as well as a Visiting Assistant Professor in the Department of Physics and Astronomy at Rowan University (Glassboro, NJ). He has earned undergraduate degrees in physics, photonics, and business administration, as well as an M.S. in Electro-Optics from the University of Dayton. Over a nearly 20-year career in optics and photonics, he has primarily focused on the development of new laser and spectroscopy applications, with a heavy emphasis on vibrational spectroscopy. He is also very heavily involved in the Federation of Analytical Chemistry and Spectroscopy Societies (FACSS), where he has served for several years as the Workshops Chair for the annual SciX conference and will be taking over as General Chair for the 2021 SciX conference.

Sponsored Recommendations

Demonstrating Flexible, Powerful 5-axis Laser Micromachining

Sept. 18, 2024
Five-axis scan heads offer fast and flexible solutions for generating precise holes, contoured slots and other geometries with fully defined cross sections. With a suitable system...

Enhance Your Experiments with Chroma's Spectra Viewer

Sept. 5, 2024
Visualize and compare fluorescence spectra with our interactive Spectra Viewer tool. Easily compare and optimize filters and fluorochromes for your experiments with this intuitive...

Optical Filter Orientation Guide

Sept. 5, 2024
Ensure optimal performance of your optical filters with our Orientation Guide. Learn the correct placement and handling techniques to maximize light transmission and filter efficiency...

Ensure Optimal Performance with Shortpass Filters

Sept. 5, 2024
Achieve precise wavelength blocking with our Shortpass Filters. Ideal for applications requiring effective light transmission and cutoff, these filters ensure optimal performance...

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!