研究目的
To develop a high-energy, femtosecond laser based on a strictly all-fiber chirped pulse amplification (CPA) structure operating at a low repetition rate of 1 kHz, with the aim of achieving short pulse duration and high energy output while maintaining stability and beam quality.
研究成果
The study successfully developed a strictly all-fiber CPA system delivering 112 μJ pulses at 1 kHz repetition rate with a duration of 180 fs. The system demonstrated high stability and good beam quality, making it suitable for applications requiring low repetition rate pulses.
研究不足
The system's pulse energy is limited by the peak power to avoid undesired nonlinear effects. The introduction of more free space components could lower system efficiency and stability.
1：Experimental Design and Method Selection:
The study employed a strictly all-fiber CPA system with synchronously pumping technology to suppress amplified spontaneous emission (ASE) and heat accumulation. A chirped fiber Bragg grating (CFBG) was used as the pulse stretcher for adjustable dispersion.
2：Sample Selection and Data Sources:
The system included an oscillator, stretcher, pulse picker, three stages of fiber amplification, and a compressor.
3：List of Experimental Equipment and Materials:
Equipment included a CFBG (TeraXion, TPSR-T), Yb-doped fibers (Nufern, PM-YSF-HI and PLMA-YDF-HI-8 30/250), and transmission gratings (LightSmyth, T-1702-1030s).
4：Experimental Procedures and Operational Workflow:
The process involved stretching the seed pulse, amplifying it through three stages, and compressing it to achieve femtosecond pulses.
5：Data Analysis Methods:
The compressed pulse duration was measured using an autocorrelator (Avesta, AA-20DD), and beam quality was assessed via M2 factor measurement.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
