Wideband extended pulsed light source, spectrometry device, and spectrometry method

A spectrometry device comprising:

• a wideband pulse source that outputs wideband pulsed light;
• a pulse extension element that extends a pulse width of the wideband pulsed light from the wideband pulse source to generate a wideband extended pulsed light,
• wherein the pulse extension element includes a single-mode multi-core fiber and a single-mode bundle fiber having a plurality of cores and performing pulse extension in each of the cores to cause a relationship between an elapsed time and a wavelength in a pulse to be a one-to-one relationship;
• a photodetector disposed at a location where light from a sample irradiated with the wideband extended pulsed light from the wideband pulsed light source is received;
• and
• an arithmetic means that performs an arithmetic operation that converts a temporal change in output data from the photodetector into spectrum data in accordance with a relationship between a time and a wavelength in a pulse extended by the pulse extension element.

A spectrometry method comprising:

• a pulse extension step of causing wideband pulsed light to enter a single-mode multi-core fiber or a single-mode bundle fiber having a plurality of cores, and performing pulse extension in each of the cores to cause a relationship between an elapsed time and a wavelength in a pulse to be a one-to-one relationship;
• an irradiation step of irradiating a sample with wideband pulsed light that has been pulse-extended;
• a light reception step of receiving light from a sample irradiated with the wideband pulsed light by a photodetector;
• and
• an arithmetic step of performing an arithmetic operation that coverts a temporal change in output data from the photodetector into spectrum data in accordance with a relationship between a time and a wavelength in a pulse extended in the pulse extension step.