GNRs　can　be　readily　produced　by　unzipping　the　nanotubes　because　CNT　structure　can　be　analogically　considered　as　graphene　sheets　rolled　up.　This　is　a　special　2D　graphitic　structure　performing　the　exceptional　properties.　Due　to　the　unique　structure　and　the　outstanding　properties,　GNRs　have　been　used　in　a　vast　range　of　applications,　including　transistors,　optical　and　microwave　communication　devices,　biosensors,　chemical　sensors,　electronic　memory　and　processing　devices,　nano　electromechanical　systems,　and　composites.　The　morphology　of　the　fiilms　was　observed　by　scanning　electron　microscopy　(SEM),　and　the　properties　of　graphene　were　characterized　by　Raman　spectroscopy.　The　conductivity　of　the　fiilms　was　measured　by　a　semiconductor　parameter　measurement　system.　Raman　spectroscopy　showed　that　the　Raman　characteristics　of　graphene　characterized　by　optimized　process　were　enhanced.　Laser　energy　and　irradiation　time　were　two　important　parameters　for　the　preparation　of　graphene　from　carbon　nanotubes.　In　this　study,　to　open　carbon　nanotubes　by　laser,　graphene　nanoribbons　were　produced　by　excimer　laser　irradiation　of　carbon　nanotubes　thin　films.　The　experimental　results　show　that,　with　the　laser　energy　150　mJ,　the　carbon　nanotubes　are　not　opened　while　the　connection　is　observed.　With　the　energy　450　mJ,　the　carbon　nanotubes　can　be　effectively　destroyed,　and　graphene　strips　can　be　partially　opened　to　form.　At　this　time,　the　conductivity　of　the　fiilm　reaches　the　maximum　value.　Due　to　the　thermal　accumulation　effect,　a　large　number　of　porous　structures　appear　on　the　wall　of　carbon　nanotubes.　Copyright　©2020　Infrared　and　Laser　Engineering.　All　rights　reserved.