| 摘要 |
PURPOSE:To obtain a laser device which is able to generate ultrahigh speed squeezed optical pulses of 10 femtoseconds in width by a method wherein a medium possessed of a tertiary nonlinear susceptibility larger than that of a saturable absorbing medium is provided inside an antiresonant ring so as to intersect the optical axis of the antiresonant ring at a Brewster angle. CONSTITUTION:An antiresonant ring is composed of a beam splitter and high reflectivity reflectors 2 and 4, a medium 3 large in tertiary nonlinear susceptibility is provided inside the antiresonant ring so as to intersect the optical axis of the antiresonant ring at a Brewster angle, a self-phase modulation effect is controlled, and squeezed pulses 1 can be directly taken out of the antiresonant ring. That is, a passive mode synchronous laser, where the tertiary nonlinear medium 3 is inserted into a resonator to induce a self-phase modulation and to compensate this frequency chirp at the same time, has a function to squeeze pulses, so that it can stably propagate pulses of 10 femtoseconds in in width using prisms 6-9. By this setup, a laser device which is able to generate ultrahigh speed squeezed optical pulses which are 10s of femtoseconds in width can be obtained. |
