That means the same-sized optical spectrometer
, previously limited by its optical construction to a signal-to-noise ratio (SNR) of 300:1, can now be expected to stretch a linear detector to reach a SNR of well over 3000:1.
These new devices can be thought of as a cross between a microscope and an optical spectrometer
, a tool that measures the wavelengths associated with different colors of light, Ben-Amotz says.
Raman spectroscopy uses a "pump" laser to stimulate the target and an optical spectrometer
to analyze the emitted optical signal.
* a switchable micromirror array for an optical spectrometer
By combining an optical spectrometer
with a beam profile reflectometer, researchers can measure complex devices nondestructively.
Researchers at Oak Ridge (Tenn.) National Lab (ORNL) took a different approach and designed an optical spectrometer
that can be specifically tuned, in the design stage, for specific, small-scale sensing applications.