Patent ID: 8391324

Claim:
An optical oscillator that uses chirped pulse amplification and generates an intense optical high field, the optical oscillator comprising: an optical amplification medium which has an ability to convert optical energy for a wide band or plural bands and performs optical energy conversion into an optical pulse oscillated in an optical resonator; a negative dispersion element which gives negative dispersion to the oscillating optical pulse; a mode locking unit which gives a mode locking to the optical resonator; a positive dispersion element which gives positive dispersion to the oscillating optical pulse; a resonator length extending member which extends a length of the optical resonator of the oscillating optical pulse; an optical system which includes the resonator length extending member and circulates the oscillating optical pulse along a loop optical path from the optical amplification medium via the negative dispersion element, the mode locking unit, and the positive dispersion element, back to the optical amplification medium in at least one of a forward direction and a backward direction; and a vacuum chamber which includes an optical window through which the oscillating optical pulse enters or exits and includes at least the negative dispersion element, the mode locking unit, and the positive dispersion element, wherein the optical oscillator includes an intense optical high field generating member that (i) is disposed in the vacuum chamber, (ii) receives the oscillating optical pulse from the negative dispersion element or the positive dispersion element and (iii) forms a generation point of the intense optical high field.