Spectroscopic device

A spectroscopic device comprising:

• a planar lightwave circuit to which light passing through an optical fiber is input, the planar lightwave circuit configured to divide wavelengths of the light from the optical fiber;
• a reflection-type wavelength divider that more finely divides respective wavelengths of light passing from the planar lightwave circuit;
• a beam splitter configured to divide a traveling direction of light passing from the reflection-type wavelength divider into an external sample inlet and an internal sample inlet, and adjust power of the divided light;
• a charge-coupled device (CCD) image sensor configured to convert light transmitted from the internal sample inlet to an electrical signal, or convert light reflected by the external sample inlet to an electrical signal;
• a control and signal processor configured to process the electrical signal to indicate a light intensity based on each wavelength;
• and
• an input and output interface configured to perform a spectrum analysis for each wavelength using the processed electrical signal.