【摘要】：為了獲得高重復(fù)頻率的飛秒激光脈沖,將突發(fā)運(yùn)行模式引入飛秒碟片再生放大系統(tǒng)中。通過將再生放大器的腔長設(shè)計(jì)為9.3m,激光系統(tǒng)輸出了接近衍射極限的激光脈沖,且激光脈沖的重復(fù)頻率為電光調(diào)制頻率的5倍。在電光調(diào)制頻率為5kHz、吸收的抽運(yùn)功率為98 W的條件下,獲得了最高輸出功率為10.7 W、光譜半峰全寬為1.18nm、脈沖寬度為777fs的雙曲正割脈沖輸出。再生放大器的光-光轉(zhuǎn)換效率隨著電光調(diào)制頻率的增加而增加,從頻率為0.5kHz時(shí)的12.4%增加到頻率為5kHz時(shí)的25.3%。激光的輸出穩(wěn)定性在18~20℃的溫度區(qū)間內(nèi)隨著水冷溫度的降低而提高,激光系統(tǒng)輸出功率的均方根從20℃時(shí)的0.93%變?yōu)?8℃時(shí)的0.52%。該研究結(jié)果對于設(shè)計(jì)具有高重復(fù)頻率、高功率且性能穩(wěn)定的飛秒激光系統(tǒng)具有參考價(jià)值。
[Abstract]:In order to obtain femtosecond laser pulse with high repetition rate, the burst mode is introduced into the femtosecond disc regenerative amplification system. By designing the cavity length of the regenerative amplifier at 9.3 m, the laser system outputs laser pulses close to the diffraction limit, and the repetition rate of the laser pulses is 5 times that of the electro-optic modulation frequency. When the electro-optic modulation frequency is 5 kHz and the absorbed pump power is 98 W, the maximum output power is 10.7 W, the full half-width of spectral peak is 1.18 nm, and the pulse width is 777fs. The optical-optical conversion efficiency of the regenerated amplifier increases with the increase of electro-optic modulation frequency, from 12.4% of the frequency of 0.5kHz to 25.3% of the frequency of 5kHz. The output stability of the laser increases with the decrease of the water cooling temperature in the temperature range of 18 ~ 20 鈩，

本文編號(hào)：2397608