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Spectroscopy White Papers
PDH Technique with Moku:Lab’s Laser Lock Box — An FPGA-based all-in-one Solution for Laser Frequency Locking
The Pound-Drever-Hall (PDH) technique was first introduced by R.V. Pound, Ronald Drever, and John L. Hall in 1983. It is a widely used method to match the emitting optical frequency of a laser to a Fabry-Perot cavity. PDH locking uses light reflected from the cavity to create an error signal that can be used to make small changes in either the length of the cavity or of the frequency of the laser so that they remain matched and transmission is maximized. The closer the length of the cavity is...
Reducing Interference Pattern in Multimode Optical Fiber
The spectrographic imaging quality from Integral Field Units (IFUs) in astronomical imaging are limited due to Whispering Gallery Modes (WGM) in multimode optical fibers. Modifications in the production process reduces unwanted interference in...
Photobiological Safety Measurements
In recent decades, advances in materials science and technology have substantially improved the quality of lighting products. LEDs in particular have become more rugged, with higher efficiencies, greater stability, and emit significantly higher...
Boost Efficiency in the QC Laboratory: How NIRS Helps Reduce Costs up to 90%
Underestimation of quality control (QC) processes is one of the major factors leading to internal and external product failure, which have been reported to cause a loss of turnover between 10–30%. As a result, many different norms are put in place...
Photodigm HOT™ DBR Lasers
The Photodigm family of high-power edge-emitting Distributed Bragg Reflector (DBR) laser diodes is based on Photodigm’s proprietary single epi growth DBR laser architecture. Since their introduction over 10 years ago, Photodigm DBR lasers have...
Benefits of Client-Server Systems for Quality Control with Vis-NIR Spectroscopy
Analyzer systems monitoring product quality can offer substantial advantages when organized in a client-server network compared to the more traditional local installation. This white paper presents different client-server setups and their benefits....
Highly Efficient Tunable Filter for Broadband Light Source
A new, simple and compact approach for tunable wavelength filtering is introduced with a device called Flexible Wavelength Selector. This new device combines the flexibility of a monochromator with the imaging functionality of a thin-film...
Learn about the Rhea Spectrometer Series
Admesy’s Rhea is a flexible platform in configurable spectral measurement demands within the range between 200 and 1100 nm. Various choices in slit size, gratings, and sensors allow you to build the perfect spectral measurement solution for your...
Cloud-Based, AI Deep Learning Enabled Handheld Raman for Mixture Analysis
CloudMinds XI™ is the world’s first cloud-based, AI deep learning enabled handheld Raman spectrometer. Being integrated with a smartphone, its operation is fully automated with an intuitive android app suitable even for novice users. XI™...
Make or Buy Your Spectrometer
One of the challenges instrument makers face today is an increasing need to bring new innovative products to the market faster and at a lower cost. Spectrometers are an essential component in analytical instruments for a broad range of applications,...
Lean Manufacturing of Polyurethane, Assisted by Near-Infrared (NIR) and Raman Spectroscopy
Chemical manufacturing such as polyurethane production is characterized by a cost intensive production process combined with a negative ecological impact. These adverse effects can be significantly improved by using vibrational spectroscopy. This...
A High-Quality Raman Microscope Can Be Recognized by These 5 Criteria
Raman spectroscopy long remained a technique that was only performed in special laboratories. In recent years, however, it has been increasingly losing its outsider status. The reason for this is the development of the confocal Raman microscope,...
High-Resolution Chemical Imaging with Tapping AFM-IR
Where the spatial resolution of conventional bulk IR spectroscopy is limited by diffraction to ~3-10 µm, atomic force microscopy (AFM) provides a nanoscale topographic map of a sample surface. However, AFM has been unable traditionally to chemically...
X-Ray Toroids
Optical fabrication techniques discussed to produce bent crystal analyzers that conform to toroidal surfaces for hard and soft x-ray applications including x-ray spectroscopy, ultrafast laser excited x-ray sources, imaging, and plasma diagnostics.
Next Generation Echelle Spectrometer for Optical Emission Spectroscopy
The SPECTRAL Industries IRIS echelle spectrometer features a combination of large bandwidth and high spectral resolution. It is ideal for Optical Emission Spectroscopy (OES), astronomy, and time-resolved fluorescence. Its gating below 100 ns is...
Timegated Raman Technology for Metallurgy
Timegated Raman spectroscopy is suitable for online measurements for nitric and sulfuric acid quantification. It has many advantages compared to conventional acid quantification methods., for example, it is fast, only a minimal amount of sample...
X-Mode™ DBRs Enable Extended Tuning Range
The Photodigm family of high-power edge-emitting Distributed Bragg Reflector (DBR) laser diodes is based on Photodigm’s proprietary single epi growth DBR laser architecture. The Photodigm DBR laser architecture consists of an electrically pumped...
Raman Spectroscopy in Crystallization
Two trends in the regulatory landscape have created new scientific opportunities and financial motivations for using process analytical technologies (PAT) in small molecule and biopharmaceutical manufacturing. One critical quality attribute of a...
A Smart Handheld Raman Spectrometer with Cloud Data Platform and AI Deep Learning Algorithm
CloudMinds's XI™ is the world’s first cloud AI based handheld Raman spectrometer with 785nm laser excitation. Being fully integrated with Cloudminds’s Data A1 smartphone, operation of XI™ is fully automated with an intuitive android app suitable for...
Time-resolved Fluorescence Spectroscopy and Microscopy in Materials Science
Studying luminescence lifetime data is a very powerful analytical tool to gain insights into the excited state dynamics of molecules, nanoparticles, or semiconductors. Time-resolved methods such as Fluorescence Lifetime Imaging are commonly used in...
White Dwarf and Monaco: A Simple Turnkey Source of <10 fs Pulses
This white paper describes a simple source of ultrashort (<9 femtoseconds) laser pulses: an optical parametric chirped-pulse amplifier (OPCPA) incorporating a high repetition rate ytterbium fiber amplifier – the Coherent Monaco. The integrated...
Hyperspectral Imaging Cameras in Rapid Detection and Potential Diagnosis of Agricultural Crop Threats
Remote monitoring of crops via satellites using color cameras was the earliest form of spectral imaging in agricultural management. Due to limited capabilities, only basic plant health parameters could be reported. The advent of hyperspectral...
The VisIR-765 “STED” - A Versatile Picosecond Pulsed Laser Module for Spectroscopy and Microscopy
Studying luminescence lifetime is a very powerful analytical tool, as it provides insights into the excited state dynamics of molecules, complexes, or semi-conductors. Pulsed laser modules with temporal pulse widths in the range of tens to a few...
Embedded Motion Modules Make Great Products Smaller
Embedded motion modules are a new option for product design teams. Combining mechanical and electrical functions in one optimized, easy-to-integrate device, they speed the design process and ensure smallest system size. Electrical connections are DC...
How to Design a Detector Noise Limited Instrument with PbSe Detectors
Pyrometers, NDIR gas analyzers, and flame monitoring systems, often make use of MWIR photoconductive PbSe detectors. Particularly, when high sensitivity and quick response time at an affordable cost are required. In order to achieve the optimal...
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April 2024
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