102 W all-fiber broadband superfluorescent source based on ytterbium-doped double-cladding fibers

Abstract

We report high-power all-fiber superfluorescent source based on ytterbium-doped double-cladding fibers (DCFs). This was achieved via an all-fiber master oscillator power amplifier (MOPA) configuration which consisted of a broadband amplified spontaneous emission (ASE) seed source and a stage of fiber power amplifier. A considerable single-pass gain up to 29.4dB was achieved in the amplification stage without self-pulsing, relaxation oscillation or longitudinal mode competition. The emission spectrum was centered at 1043nm with the full width half maximum (FWHM) bandwidth 20.5nm. The maximum output power yielded by the amplifier was 102W with slope efficiency 70%. Further improvements in power scaling are attainable by use of additional cascaded fiber amplifiers. Various applications of high-power superfluoresecent fiber source (SFS) are to be explored.We report high-power all-fiber superfluorescent source based on ytterbium-doped double-cladding fibers (DCFs). This was achieved via an all-fiber master oscillator power amplifier (MOPA) configuration which consisted of a broadband amplified spontaneous emission (ASE) seed source and a stage of fiber power amplifier. A considerable single-pass gain up to 29.4dB was achieved in the amplification stage without self-pulsing, relaxation oscillation or longitudinal mode competition. The emission spectrum was centered at 1043nm with the full width half maximum (FWHM) bandwidth 20.5nm. The maximum output power yielded by the amplifier was 102W with slope efficiency 70%. Further improvements in power scaling are attainable by use of additional cascaded fiber amplifiers. Various applications of high-power superfluoresecent fiber source (SFS) are to be explored.