Organic　lasers　based　on　distributed　feedback　(DFB)　microcavities　have　been　extensively　investigated.　However,　the　application　of　these　lasers　is　limited　by　their　low　output　power　and　large　beam　divergence.　Therefore,　laser　amplifiers　are　needed　to　achieve　practically　applicable　laser　intensity　and　controllable　lasing　modes　for　far　-field　applications.　In　this　work,　we　report　self　-injection　-locked　laser　amplifiers　using　the　combination　of　a　DFB　microcavity　and　a　Bragg　reflector,　where　a　high　-reflection　mirror　acts　as　the　Bragg　reflector　and　its　feedback　supplies　the　external　-cavity　injection.　The　coherent　coupling　between　the　DFB　microcavity　and　the　Bragg　amplifier　is　crucial　for　achieving　high　conversion　efficiency　and　highcontrast　transverse　modes.　An　amplification　factor　larger　than　20　and　a　single　output　laser　spot　with　high　contrast　that　has　been　achieved.　Such　an　integration　design　of　the　self　-injected　DFB　microcavity　amplifier　can　be　directly　utilized　in　the　realization　of　high-performance　thin-film　laser　sources　for　practical　applications.