- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - CPA-Free High Repetition Rate Few-Cycle OPCPA
摘要： Optical Parametric Chirped-Pulse Amplification (OPCPA) systems have become a key-enabling light source providing high energies at high repetition rates and covering a wide range of wavelengths from the visible to the mid-infrared with few cycle pulse durations. However, most systems are complex and rather bulky due to large fiber or regenerative amplifiers used as a pump source. The additional need for a stretcher and compressor in the pump laser adds complexity, timing jitter and reduces the overall optical-to-optical efficiency. In this work, we present a novel approach that allows a high repetition rate, few-cycle OPCPA system based on a compact and CPA-free solid-state amplifier system. We recently demonstrated the feasibility of the concept using two subsequent direct diode pumped solid-state amplifier modules (neoVAN-2P, neoLASE GmbH) based on Nd:YVO4 as a pump laser. We were able to amplify the ultrabroadband pulses from a home-built, octave-spanning Ti:sapphire laser to generate few-cycle pulses with a duration of 8.7 fs with an energy of 18 μJ at 10 kHz repetition rate. The compact, CPA-free system has a reduced system footprint and high efficiency as no losses in a compressor are occurring. For the amplification of few-cycle signal pulses, stretching to more than a few ps and subsequent recompression is problematic and limited the achievable pulse duration in our previous system. Insufficient temporal overlap between pump and signal pulses in the OPA stages will however cause lower parametric conversion efficiency and a significantly higher super-fluorescence background. In this work, we show for the first time a compact few-cycle OPCPA system using a newly developed Yb:YAG solid-state amplifier as pump source. The Yb:YAG amplifier modules are capable of generating pump pulses with a duration of < 600 fs. These output parameters are ideally suited for few-cycle OPCPA pumping and eliminate the above mentioned drawbacks of the previous approach. The high pump power and short pulse duration delivered by the amplifier modules enable a similar performance of the OPCPA as typical high repetition rate, rod-fiber based systems at the benefit of CPA-free operation and compactness. As the amplifier modules are equipped with an efficient CPA-free, directly diode pumped solid-state pump source with all-optical synchronization to an ultra-broadband Ti:sapphire seed oscillator. The availability of such portable, breadboard-user-friendly OPCPA will be a great benefit for many applications as spectroscopy, nonlinear imaging or even attosecond physics.
关键词： Yb:YAG,solid-state amplifier,few-cycle pulses,high repetition rate,OPCPA
更新于2025-09-19 17:13:59
-
[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Characterization, Integration and Operation of a 100-W Solid State Amplifier in the Advanced-VIRGO Pre-Stabilized Laser System
摘要： VIRGO is a 3-km-arm laser interferometer for gravitational wave detection in the 20 Hz - 5 kHz frequency band. Its second-generation version, Advanced VIRGO, aims at reducing the detector noise by a factor of ten compared to the first generation, with the progressive deployment of new technologies and equipment. The first detections of gravitational waves with VIRGO were made in August 2017. For its next scientific observations with an increased sensitivity, a pre-stabilized laser system twice as powerful has been developed. It comprises a new 100-W solid-state amplifier pumped at 878.7 nm. It is the first time such amplifier is integrated in a gravitational wave detector, LIGO detectors using a 70 W amplifier pumped at 808 nm. Power noise, long term power stability, frequency noise, beam jitter and transverse mode quality have been extensively studied and compared to Advanced VIRGO requirements.
关键词： beam jitter,solid-state amplifier,Advanced VIRGO,power noise,laser interferometer,frequency noise,gravitational wave detection
更新于2025-09-11 14:15:04