Patent ID: 7245369

Claim:
An apparatus for Raman spectroscopy of physical matter, the apparatus comprising: (a) a spectrum narrowed and stabilized laser element for generating a laser beam and for causing the laser beam to enter the physical matter to stimulate Raman scattering in the physical matter and thereby to produce a Raman signal, the spectrum narrowed and stabilized laser element comprising a laser chip and a Bragg grating attached directly onto the laser chip; (b) at least one optical filter, disposed in a path of the Raman signal, for removing Rayleigh scattering from the Raman signal to produce a filtered Raman signal; (c) an optical spectrometer, disposed in a path of the filtered Raman signal, for measuring the spectrum of the Raman signal and for generating a detection signal; and (d) a microprocessor, connected to receive the detection signal, for determining properties of the physical matter from the detection signal.