We　report　a　multicore　photonic　crystal　fiber　(PCF)　amplification　system　delivering　about　110-W　laser　pulses　with　a　duration　of　sub-100　fs.　This　amplifier　is　seeded　by　a　large　mode　area　(LMA)　PCF　mode-locked　oscillator　with　a　repetition　rate　of　100　MHz.　By　a　one-stage　nonlinear　amplification,　the　pulse　energy　is　scaled　up　to　1.1　mu　J.　In　addition,　the　amplified　pulses　can　be　compressed　to　as　short　as　83　fs,　corresponding　to　a　peak　power　of　13　MW.　For　the　multicore　fiber　used　in　this　letter,　the　110-W　output　average　power　has　already　made　the　mode　distribution　unstable.　The　results　show　that　the　potential　output　power　of　a　multicore　LMA　fiber　is　mainly　limited　by　the　mode　instability　compared　with　the　accumulated　nonlinearity.