We　report　on　a　high-pulse-energy　888　nm　diode-pumped　passively　mode-locked　TEM00　Nd:YVO4　oscillator　without　spatial　hole　burning　(SHB)　effect　in　active　medium.　At　a　pump　power　of　40　W,　the　oscillator　produced　pulse　energy　up　to　270　nJ　at　a　repetition　rate　of　50　MHz,　corresponding　to　average　power　of　13.5W　with　34%　optical-to-optical　efficiency.　To　the　best　of　our　knowledge,　it　is　the　highest　pulse　energy　obtained　at　the　same　pump　power.　The　pulse　duration　produced　varied　from　16　to　59　ps.　By　varying　the　pump　power,　we　observed　a　pulse　duration　ranging　from　52　to　59　ps　while　the　time-bandwidth　product　remained　0.88,　and　the　factors　that　affect　the　pulse　duration　were　also　discussed.　Meanwhile,　a　novel　method　of　adjusting　output　coupling　(OC)　was　introduced,　which　can　simplify　the　structure　of　laser.　(C)　2014　The　Japan　Society　of　Applied　Physics