@article{1786, author = {F. Cruz and M. Stowe and Jun Ye}, title = {Tapered semiconductor amplifiers for optical frequency combs in the near infrared}, abstract = { A tapered semiconductor amplifier is injection seeded by a femtosecond optical frequency comb at 780nm from a mode-locked Ti:sapphire laser. Energy gains of more than 17dB (12dB ) are obtained for 1mW (20mW) of average input power when the input pulses are stretched into the picosecond range. A spectral window of supercontinuum light generated in a photonic fiber has also been amplified. Interferometric measurements show sub-Hertz linewidths for a heterodyne beat between the input and amplified comb components, yielding no detectable phase-noise degradation under amplication. These amplifiers can be used to boost the infrared power in f-to- 2f interferometers used to determine the carrier-to-envelope offset frequency, with clear advantages for stabilization of octave-spanning femtosecond lasers and other supercontinuum light sources. © 2006 Optical Society of America}, year = {2006}, journal = {Optics Letters}, volume = {31}, pages = {1337}, month = {2006-05}, issn = {0146-9592}, doi = {10.1364/OL.31.001337}, }