Fiber Gratings are found among the most popular devices widely used in both, optical communications and optical fiber sensing. Within optical communication networks, optical fiber-based devices perform critical operations such as coupling/splitting, wavelengthselective filtering, and optical switching (Han, Y. G. et al., 2004; An H. et al., 2004; Eggleton B. J. et al., 1997). In the field of op...

The use of a range of optical techniques to monitor the process of fabricating optical fiber tapers is investigated. Thermal imaging was used to optimize the alignment of the optical system; the transmission spectrum of the fiber was monitored to confirm that the tapers had the required optical properties and the strain induced in the fiber during tapering was monitored using in-line optical fi...

For optical communication links using wavelength-division multiplexing over a long-haul fiber optic backbone, stimulated raman scattering may lead to significant transmission impairment. This paper discusses the enhanced analysis for the SRS induced crosstalk in the optical networks. The expression for Stimulated Raman Scattering induced crosstalk have been observed at different fiber types( as...

We implemented all-fiber delay line using linearly chirped fiber Bragg gratings (CFBG), which can be applicable for reflectometry or optical coherence tomography (OCT). Compared with the previously reported delay lines, the proposed fiber-based optical delay line has in principle novel advantages such as automatic dispersion cancellations without additional treatment and a gain in optical delay...

We transfer an optical frequency over 251 km of optical fiber with a residual instability of 6x10(-19) at 100 s. This instability and the associated timing jitter are limited fundamentally by the noise on the optical fiber and the link length. We give a simple expression for calculating the achievable instability and jitter over a fiber link. Transfer of optical stability over this long distanc...

This paper investigates the performance limitations due to Relative Noise Intensity (RIN) of long haul direct detection optical single side band systems employing subcarrier multiplexed techniques (OSSB/SCM) using in-line optical amplifiers. The influence of fiber nonlinearity, dispersion and loss on the RIN spectrum at fiber output is quantified and validated by simulation. Our results show th...

The statistics of polarization-induced visibility fading is studied for fiber-optic interferometric (Michelson or Mach-Zehnder) sensor arrays made of either regular singlemode fibers or polarization-maintaining fibers. Performance is measured in terms of the probability to observe visibilities, all of which exceed a given value, for all members of the array. Very poor performance is obtained fo...

Many applications rely on the ultra-precise timing of optical signals through fiber, such as fiber interferometers, large telescope arrays, in phase arrayed antennae, optical metrology, and precision navigation and tracking. Environmental changes, specifically those caused by temperature fluctuations, lead to variations in the propagation delay of optical signals and thereby decrease the accura...

Also the optical fiber amplifiers FAs that amplify weak signals such as the. Rare-Earth-Doped Fiber Lasers and Amplifiers, Michael J.F.Chapter 2. Optical and Electronic Properties of Rare Earth Ions in Glasses William J Miniscalco Abstract-HiRes PDF 2316 KB-PDF wlinks 2330 KB.amplifier materials in the system of rare-earth doped glasses are presented. rare-earth-doped ram concept manual pdf fib...