With　the　aid　of　the　particle　swarm　optimization　algorithm　(PSOA),　the　layout　of　10x10　vertical　cavity　surface　emitting　laser　(VCSEL)　array　is　optimized　to　improve　the　output　optical　power.　The　simulation　results　show　that,　for　the　optimized　VCSEL　array　with　PSOA,　the　peak　junction　temperature　is　lowered　by　6.55K,　and　the　non-uniformity　of　the　junction　temperature　distribution　is　improved　by　32.56%　when　compared　with　the　conventional　VCSEL　array　without　PSOA.　As　a　result,　the　output　optical　power　is　increased　by　89.86%.　Furthermore,　both　the　VCSEL　arrays　with　and　without　PSOA　are　fabricated　and　the　experimental　results　are　consistent　well　with　the　simulation　results.　©　2024　SPIE.