Abstract

Photoinduced fiber Bragg gratings are finding a number of applications as narrow bandpass filters, in fiber lasers, as sensors, and for optical pulse compression and the compensation of chromatic dispersion suffered in high-speed optical-communication systems.¹ One of the problems associated with gratings in some of these applications is that they operate in reflection, and so in order to recover the reflected radiation they are used in conjunction with a 50:50 coupler, incurring a signal loss of at least 6 dB. In this paper we report a novel low-loss-fiber transmission filter, based on the use of fiber gratings and a fiber polarization splitter, that offers a few advantages in comparison with previously proposed methods.^2,3

© 1995 Optical Society of America