The photobleaching effect is the photochemical destruction of a fluorophore by high-intensity light, which has long been a nuisance in the field of biotechnology. This undesired effect damages the bio-sample intensively, as often encountered in multiphoton microscopy. Here, we demonstrate a unique cover glass-like device to solely enhancing the fluorescence excitation and detection, achieving a 20-fold maximum gain without photobleaching, by means of a one-dimensional photonic crystal infiltrated with liquid crystal as a central defect layer. In comparison with the typical fluorescence enhancement techniques involving the excitation amplification proposed previously, our method, characterized by the compression of excitation pulse instead, generates the higher excitation possibility. The photonic bandgap structure employed in this approach possesses two modes: tunable fluorescence enhanced and strong fluorescence enhanced, enabling such devices to find a place in bio-imaging technologies.