The amount of photosensitizer in holographic recording media is very small, but it plays a decisive role in the selection of recording wavelength. A series of cyclopentanone photosensitizers are designed and synthesized for 532 nm laser, and their spectral characteristics, reaction kinetics to induce monomer polymerization, and application performance in photopolymer for holographic recording are studied. The results show that the sample containing BTMI (2,5-bis(2-(1,3,3-trimethylindolin-2-ylidene)ethylidene)cyclopentanone) has the best holographic recording performance, and the diffraction efficiency of single grating reaches 90% when the total exposure dosage is 64 mJ/cm ², the refractive index modulation is 4.14×10 ^-4, and the full width of half peak of Bragg grating selection angle is 0.90°. Under the exposure of a single laser pulse (wavelength is 532 nm, pulse width is 150--200 ps, energy density is 25 mJ/cm ²), the sample can obtain a holographic grating with diffraction efficiency of 7%, indicating that information can be recorded quickly. By optimizing the formulation, BTMI is expected to be applied to fabricate fast and high density holographic storage media.