Modified reflective cladding in a variable-section active optical fiber cuts pump leakage and overheating while preserving beam quality at higher power.
A trench-assisted erbium-doped fiber amplifies each core while reducing crosstalk and tunneling losses in multi-core submarine links.
Spectrum broadening in normal-dispersion fiber suppresses multi-solitonization while enabling high-power, GHz-rate wavelength modulation.
Manipulating the pulse waveform before amplification changes laser pulse width with fewer optical components and a smaller footprint.
A high-conductivity outer covering dissipates heat at lateral pump junctions, enabling higher fiber amplifier power with lower degradation risk.
Coherent spectral combining and feedback pulse shaping enable compact kHz gamma-ray generation with bandwidth-limited flattop pulses.
Placing pulse amplification near the delivery end limits fiber-induced dispersion and nonlinearity, preserving high-power laser pulse shape.
Multiple rare-earth-doped cores with controlled density and radius improve pump absorption and power conversion in L-band cladding-pumped amplifiers.
Pre-modulating seed beam modes with amplitude, phase, and multiplexing suppresses TMI and enables higher-power fiber amplification.