[Show abstract][Hide abstract] ABSTRACT: We summarize the latest advances in space-division multiplexing (SDM) for increasing the capacity per fiber strand. We discuss SDM fibers, recent SDM transmission experiments, subsystems suitable for SDM systems, as well as integrated components able to manipulate multiple spatial modes within a single optical device.
[Show abstract][Hide abstract] ABSTRACT: We experimentally demonstrate broadband four-wave mixing (FWM) between two spatial modes of a 5-km-long few-mode fiber. We show that, in contrast to FWM in single-mode fibers, inter-modal FWM (IM-FWM) can be better phase matched for waves well separated in frequency (a few THz) than when they are closely spaced (tens of GHz).
Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013; 01/2013
[Show abstract][Hide abstract] ABSTRACT: We transmitted five wavelength channels and six spatial and polarization modes over a 209-km-long hybrid few-mode fiber span. The fiber supports six spatial and polarization modes, and consists of a first section of large effective area depressed-cladding few-mode fiber followed by a graded-index few-mode fiber. The differential group delay is compensated by using fiber spools with differential group delay of opposite sign. Low-loss three-spot mode couplers are used to couple to the few-mode fiber, and backward pumped-distributed Raman amplification is used to overcome the fiber loss. The 40-Gb/s QPSK signals with an aggregate capacity of 1.2 Tb/s are recovered by coherent multiple-input-multiple-output off-line digital signal processing. The impulse response at various span lengths is compared and analyzed in detail.
[Show abstract][Hide abstract] ABSTRACT: We present designs for a low-loss mode coupler based on multiple Gaussian spots that can selectively address spatial and polarization modes of a few-mode fiber. In particular we show a design optimized for a few-mode fiber with 12 spatial and polarization modes (LP01, the twofold degenerate LP11 and LP21, and LP02), with a mode dependent loss
Photonics Society Summer Topical Meeting Series, 2012 IEEE; 01/2012
[Show abstract][Hide abstract] ABSTRACT: We experimentally demonstrate transmission of 6 mode-multiplexed 20-Gbd-QPSK signals over 1200 km of three-core microstructured fiber (3C-MSF). An aggregate single-wavelength capacity of 240 Gbit/s is recovered by off-line 6×6 coherent multiple-input multiple-output (MIMO) digital signal processing.
European Conference on Optical Communication (ECOC); 09/2011
[Show abstract][Hide abstract] ABSTRACT: We show that implementing pre- and post-dispersion compensation in electronic nonlinearity compensation can significantly improve the performance of 112-Gb/s PDM-QPSK coherent systems. More electronic compensation stages are required for a system without optical dispersion compensators (ODCs) than that with ODCs.
Optical Communication (ECOC), 2010 36th European Conference and Exhibition on; 10/2010
[Show abstract][Hide abstract] ABSTRACT: We discuss criteria to select advanced optical modulation formats in order to mitigate impairments specific to various classes of fiber-optic communication systems.
Optical Amplifiers and Their Applications; 06/2004