Ultrafast high-power laser sources have a crucial role in science and industry. One way to reach performance in the multi-100-W average output power with sub-ps, tens-of-μJ pulses is through thin-disk laser (TDL) oscillators [1]. The oscillator approach to high power, compared to amplifier systems, offers superior beam quality and reduced system complexity but comes at the expense of a challenging nonlinearity management and a high sensitivity to thermal lensing. In particular, the MW-level intracavity peak power leads to a large amount of self-phase modulation (SPM) picked up in the intracavity air. The SPM needs to be compensated with negative group-delay dispersion (GDD) to ensure stable soliton pulse formation. Hence, there is a trade-off in GDD versus pulse energy for TDLs operated in air (“Standard TDLs” in Fig. 1a). Dispersive mirrors can provide the required GDD but, due to their resonant structure, they are more subject to thermal effects and damage compared to standard dielectric mirrors. A workaround is to operate the TDL in vacuum (“Vacuum TDLs” in Fig. 1a).

© 2019 IEEE

PDF Article


You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
Login to access OSA Member Subscription