The invention discloses a continuous
laser device
spectral line width
measurement device based on an
optical frequency comb. The continuous
laser device
spectral line width
measurement device is characterized by comprising an
optical frequency comb control module, an
optical frequency comb seed source, an optical
frequency comb spectrum broadening module, a continuous
laser generating source, an
optical beam combining module, an optical frequency selecting filtering module, a beat frequency detecting module and a
signal reading module. The spectrum of the precisely-controlled optical
frequency comb is broadened, output light of the precisely-controlled optical
frequency comb and output light of the continuous laser generating source together enter the
optical beam combining module, the light spots of two outgoing
laser beams coincide, and then the two
laser beams together enter the optical frequency selecting filtering module, two
laser beams obtained through filtering pass through the beat frequency detecting module, the sizes of light spots are changed through shaping, and the light spots are concentrated on a
detector, beat frequency signals are obtained through coherent combination, and the output
spectral width of the continuous lasers to be measured can be contained through the
signal reading module. The continuous laser device
spectral line width
measurement device is stable in structure and high in practicability, the measurement process is rapid and simple, and the output
spectral width of one or more wave length continuous lasers can be obtained in real time.