Measuring system

An excitation source that is configured to supply, for generating CARS signals, a Stokes light with a first range of wavelengths, a pump light with a second range of wavelengths that is shorter than the first range of wavelengths, and a probe light with a range of wavelengths shorter than the second range of wavelengths, comprising:

• an oscillator that is configured to provide source laser pulses with a predetermined oscillating wavelength pumped by a source laser diode;
• a first generator that is configured to generate the pump light with the second range of wavelengths via a highly nonlinear fiber (HNLF) from a part of the source laser pulses and generate the Stokes light with the first range of wavelengths via a photonic crystal fiber (PCF) from a part of the pump light;
• and
• a second generator that is configured to generate the probe light with the range of wavelength shorter than the second range of wavelengths via a second harmonic generation (SHG) from a part of the source laser pulses.