We need one picosecond fiber laser source with specifications below: • Repetition rate: tunable from 100 MHz to 50 GHz • Pulse duration: tunable from 1ps to 30 ps • Wavelength: tunable from 1025 to 1080 nm • Linewidth: < 0.5 nm • Polarization: linearly polarized with polarization extinction ratio of 20 dB • Beam quality M2: < 1.1 • Average power: > 1 mW • Supermode suppression: >70 dB at GHz repetition rates • Time jitter: <100 fs