We　investigate　the　spatial　frequency　response　of　a　volume　grating　recorded　in　a　ZrO2　nanoparticle-dispersed　nanocomposite.　We　experimentally　find　that　there　exists　the　optimum　recording　intensity　to　maximize　the　saturated　refractive　index　modulation　amplitude　of　a　nanocomposite　grating　recorded　at　short　and　long　grating　spacing.　A　strong　parametric　relationship　between　grating　spacing　and　recording　intensity　is　seen　and　an　increase　in　the　saturated　refractive　index　modulation　amplitude　at　shorter　grating　spacing　(＜　0.5　mu　m)can　be　obtained　by　using　higher　recording　intensities　than　those　at　longer　grating　spacing.　Such　a　trend　can　be　qualitatively　explained　by　a　phenomenological　model　used　for　holographic　polymer-dispersed　liquid　crystal　gratings.　We　also　describe　another　method　for　the　improvement　of　the　high　spatial　frequency　response　by　co-doping　of　thiol　monomer　that　acts　as　a　chain-transfer　agent.