Abstract
A high-power optical frequency comb at has been generated using a Ho:YLF multipass amplifier seeded by the long wavelength supercontinuum tail of an octave-spanning Er:fiber comb source. The Ho:YLF amplifier showed a net gain larger than from 2048 to , allowing the generation of a bandwidth comb with a mode spacing of and a power per mode ranging from 20 to . In the time domain, the amplified comb corresponds to a pulse train with total power and transform-limited pulse duration. Using a self-referencing interferometer and a phase-locking loop, spectral narrowing of the offset frequency down to less than has been achieved.
© 2011 Optical Society of America
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