I. Introduction
Chirped fiber Bragg gratings (CFBGs) have been widely investigated because of their flexible dispersion characteristics, low insertion loss, compact size, and potential for tunability [1]–[10]. The most commonly considered application is dispersion compensation in digital links; however, CFBGs may prove even more useful in wide-band analog fiber-optic links, where dispersion compensation is essential to avoid destructive interference from dispersed sidebands [11] [12] [13]. In addition to dispersion compensation, advanced optical signal-processing applications such as reconfigurable pulse shaping [14] and polarization-mode-dispersion compensation [15] have been demonstrated using CFBGs. FM discriminators based on chirped Bragg gratings in either fiber [16] or integrated-optic form [17] have also been proposed.