Self-mode-locking　(SML)　of　fundamental　TEM00　mode　and　high-order　transverse　mode　were　demonstrated　in　an　optically　pumped　semiconductor　disk　laser　and　these　states　can　be　switched　by　simply　adjusting　the　elements　of　the　laser.　The　repetition　rate　of　the　pulse　train　was　1　GHz,　using　a　straight　cavity.　Furthermore,　we　measured　the　pulse　durations　and　found　that　the　pulse　duration　of　SML　pulse　with　higher-order　transverse　mode　is　shorter　than　that　of　fundamental　mode　at　the　same　pump　power.　To　the　best　of　our　knowledge,　this　is　the　first　experiment　to　obtain　two　SML　states　in　a　single　laser.　By　using　the　method　of　changing　the　cavity　length　and　adjusting　the　angle　of　the　output　coupler,　the　repetition　rate　can　be　continuously　tuned　from　3　GHz　to　3.2　GHz.