Due　to　their　high　level　of　integration,　vertical-cavity　surface-emitting　lasers　(VCSELs)　are　promising　candidates　for　applications　in　quantum　communication　and　sub-Doppler　atomic　microsystems.　However,　there　is　an　urgent　need　to　develop　narrow　line　width,　high-quality　VCSELs　that　provide　stable　and　reliable　emission　to　meet　commercial　demands.　Here,　we　demonstrate　a　novel　coupled-cavity　VCSEL　integrated　with　a　cholesteric　liquid　crystal　(CLC)　film　to　develop　high-performance　ultranarrow　line　width　VCSELs.　The　CLC　film　can　be　flexibly　integrated　onto　the　surface　of　the　VCSEL　and　applies　weak　light　feedback　which　enhances　the　coherent　superposition　and　compresses　the　line　width　of　the　VCSEL.　It　has　been　shown　that　when　the　length　of　the　coupled　cavity　is　less　than　150　mu　m,　it　can　suppress　the　higher-order　modes　and　significantly　reduce　the　threshold　current　of　VCSEL.　Furthermore,　the　CLC-VCSEL　exhibits　circular　polarization　output　and　an　impressive　line　width　of　2.46　MHz,　which　is　the　narrowest　micron-scale　integration　VCSEL　as　reported,　comparable　to　the　line　width　of　distributed　Bragg　reflection　and　distributed　feedback　semiconductor　lasers.　Compared　with　recently　reported　high-performance　VCSELs　and　semiconductor　lasers,　the　CLC-VCSELs　achieve　a　lower　threshold　current　and　an　enhanced　beam　quality.　This　micrometer-scale　coupled　cavity　VCSEL　will　provide　more　possibilities　for　the　development　of　next-generation　VCSELs　and　integrated　packages　for　CLC　modulation.　Moreover,　the　CLC　optical　feedback　technique　is　not　exclusive　to　VCSEL　and　can　also　be　applied　to　other　optoelectronic　devices,　such　as　low-power　edge-emitting　lasers,　quantum　dot　lasers,　and　so　forth.