Method and apparatus for contrast ratio enhancement by spectral matching of a seed laser pulse and ASEamplified spontaneous emission

摘要

A laser spectroscopic matching apparatus according to an embodiment of the present invention includes a resonator for oscillating a seed laser, a pulse expander for forming a first laser for expanding the seed laser, a pulse amplifier for amplifying the first laser to form a second laser, And a pulse compressor for compressing the second laser to form a third laser, wherein the pulse expander includes a beam blocking block for blocking a part of the wavelength of the seed laser, The spectrum is matched to the spectrum of amplified spontaneous emission (ASE).