Wereportaline-narrowedelectro-opticperiodically-poled-lithium-niobate(PPLN)Q-switchedlaserwithintra-cavityopticalparametricoscillationusingagrazing-incidencegrating,producing8-ns,5-μJpulsesat10-kHzrepetitionratewhenpumpedwitha10-Wdiodelaserat808nm.Theoutputwavelengthiscenteredat1554.3nmwitha0.03-nmspectralwidth.Wavelengthtuningisachievedbyrotatingamirrorandchangingthecrystaltemperature.