We propose a method for controlling modal gain in a multimode Erbium-doped fiber
amplifier (MM-EDFA) by tuning the mode content of a multimode pump. By adjusting the …

Using multimode fibers for long-haul transmission is proposed and demonstrated
experimentally. In particular few-mode fibers (FMFs) are demonstrated as a good …

Few-mode fibers (FMFs) are used for the first time to transmit over 5000 km. Ten WDM
channels with 50GHz channel spacing at 112 Gb/s per channel using PDM-QPSK are …

We present here a refractive index profile design which can enable us to obtain a flat modal
field (FMF) around the center. The design can be used to obtain FMF both for planar …

Two kinds of the large effective-area fibers with the ring index profiles named RI and RII type
were proposed. In view of the impossibility to deduce the expression of waveguide …

In this paper, design of the RII triple-clad structure as a dispersion flattened optical fiber
including small pulse broadening factor as well as small dispersion and its slope applicable …

In this paper, the chromatic dispersion and chromatic dispersion slope of two kinds of triple-
clad single-mode fibers with a depressed index inner cladding named WI-and WII-type were …

We experimentally demonstrate fundamental mode transmission of digital power division
multiplexed direct detection-orthogonal frequency division multiplexed (DD-OFDM) signal at …

Power scaling in optical fiber-based systems, such as laser and telecommunications
systems, is often limited by optical nonlinearities. This stems from the very same advantages …

Dispersion characteristic of MI and MII type single mode optical fibers is analytically
investigated. For this purpose modal analysis of these fibers to obtain possible wave vectors …