A polymer distributed feedback (DFB) laser was fabricated by two-beam interference from MEH-PPV film on clear

glass substrate. A direct-writing technique was reported that achieves large-area 1D DFB polymer lasers. The

polymer thin film was exposed to a single-shot illumination of the interference pattern of one UV laser pulse at 355

nm. The direct-writing and the lasing characters of 1D DFB polymer lasers were demonstrated. The results show the

lower threshold and full width at half maximum (FWHM) from DFB polymer laser than slab waveguide. The peak

position is tuned by changing the period from 340 nm to 350 nm. The results show that the simple and low-cost

technique that enables highly reproducible mass fabrication is required for the easy realization and more profound

investigation of the polymer lasers based on the DFB configuration.