Fabrication of microgratings on the ends of standard optical fibers by theelectrostatic self-assembly monolayer process

The electrostatic self-assembly monolayer process has been utilized for wha t is believed to be the first time to deposit quarter-wavelength stacks on the end faces of cleaved and polished optical fibers. Standard multimode op tical fibers as well. as single-made optical fibers were used as substrates with different coating materials to fabricate broadband filters, and the e xperimentally measured spectral responses of these devices are shown. These optical filter structures were employed to develop chemical sensors that u se an unperturbed reference wavelength to normalize the output signal. (C) 2001 Optical Society of America.