Formation of chirped and chirp-free femtosecond light pulses in passively mode-locked lasers
Abstract
Laser pulses as short as 50 fs have been obtained in passively mode-locked dye ring lasers, in which the absorber induces a chirp due to saturation and phase memory that causes the pulses to be compressed in a linear optical element inside the resonator. To understand the generation of such short pulses and to find out optimum conditions, a new approach is developed taking into account the phase memory of the absorber and the amplifier. Measurements of the part of phase modulation originating from the cavity mirrors turned out to be equivalent to some 0.1 mm glass path/mirror, whereas, under typical conditions, the compensation of the chirp resulting from the action of the saturable absorber requires glass paths of about 10 mm.
- Publication:
-
Lasers 1983; Proceedings of the International Conference
- Pub Date:
- 1985
- Bibcode:
- 1985lase.conf..340D
- Keywords:
-
- Chirp Signals;
- Dye Lasers;
- Laser Mode Locking;
- Ring Lasers;
- Ultrashort Pulsed Lasers;
- Absorbers (Materials);
- Light Amplifiers;
- Nonlinear Optics;
- Phase Modulation;
- Photoabsorption;
- Saturation;
- Lasers and Masers