We demonstrate what is to our knowledge the first synchronously pumped high-gain optical parametric oscillator (OPO) with feedback through a single-mode fiber. This device generates 2.3 to 2.7W of signal power in 700 to 900-fs pulses tunable in a wavelength range from 1429 to 1473nm. The necessary high gain was obtained from a periodically poled LiTaO3 crystal pumped with as much as 8.2W of power at 1030nm from a passively mode-locked YbYAG laser with 600-fs pulse duration and a 35-MHz repetition rate. The fiber-feedback OPO setup is compact because most of the resonator feedback path consists of a standard telecom fiber. Because of the high parametric gain, the fiber-feedback OPO is highly insensitive to intracavity losses. For the same reason, the synchronization of the cavity with the pump laser is not critical, so active stabilization of the cavity length is not required
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