Femtosecond CPA hybrid laser system with pulse-on-demand operation
| Autor: | Luka Černe, Jaka Petelin, Rok Petkovšek |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
udc:681.7.069.24(045) ultrakratki bliski 02 engineering and technology Population inversion 01 natural sciences law.invention 010309 optics Optics hybrid lasers law 0103 physical sciences pulse on demand vlakenski laserji Laser power scaling hibridni laserji bliski na zahtevo business.industry Amplifier Second-harmonic generation Pulse duration ultrashort pulses 021001 nanoscience & nanotechnology Laser Atomic and Molecular Physics and Optics fiber lasers Optical modulator Femtosecond 0210 nano-technology business |
| Zdroj: | Optics express, vol. 28, no. 6, 386769, pp. 7875-7888, 2020. |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.386769 |
| Popis: | In this manuscript we present a true pulse-on-demand concept of a hybrid CPA laser system, consisting of a chirped-pulse fiber amplifier and an additional solid-state amplifier, capable of generating femtosecond pulses on demand without an external optical modulator/shutter. Pulse-on-demand operation is achieved by introducing idler pulses with a few nanoseconds duration and selectively switching between the femtosecond and idler pulses. The idler pulses are used to maintain a constant population inversion in the fiber amplifier as well as in the solid-state amplifier. Second harmonic generation (SHG) unit then effectively filters out the idler pulses due to their low peak power, leaving only a stable femtosecond pulse train. This concept is demonstrated on a CPA hybrid system that can generate pulses with up to 200 µJ at 515 nm with a pulse duration under 450 fs. As there is no optical modulator at the laser output, the presented concept also enables further power scaling. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|