All-fiber integrated chirped pulse amplification at 1.06 μm using aircore photonic bandgap fiber

摘要

We demonstrate all-fiber integrated chirped pulse amplification (CPA) at 1.06 μm using an air-core photonic bandgap fiber (APBF). Prior to the CPA stage, 4.0 ps pulses from a modelocked fiber laser were compressed to 1.3 ps in an all fiber integrated pulse compressor based on spectral broadening in a holey fiber and compression in a 12.4 m length of APBF. The compressed 1.3 ps pulses were then stretched to ～20 ps in 125 m of single mode fiber, amplified in a large mode area YDFA and recompressed to 600 fs in 50 m of APBF, which was directly spliced to the amplifier output fiber. The 600 fs output pulses had an estimated peak power of 2.6 kW.