On the functional equationf(x+f(y))=(x)f(y)

Jung, Calvin F. K.; Boonyasombat, V.; Barbaçon, G.; Jung, F. R.

doi:10.1007/bf01834059

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A dichroic mirror (980nm reflection and 1550nm transmission) was used to reject any unabsorbed pump power while a polarization-insensitive isolator was used to suppress any signal light propagation in the backward direction. The passive TMF was then spliced directly to a 5m-length of mode-matched Er 3+ -doped active fiber [4][5][6] and a 980nm pump laser was free-space coupled into the TM-EDF using two dichroic mirrors. The amplified output was coupled into another 10m-length of TMF and was demultiplexed into three spatial channels using mode DEMUX.…”

Section: Introductionmentioning

confidence: 99%

Multimode EDFA performance in mode-division multiplexed transmission systems

Jung

Sleiffer

Inan

et al. 2013

Optical Fiber Communication Conference/National Fiber Optic Engineers Conference 2013

View full text Add to dashboard Cite

Abstract:We report a detailed study on the system performance of a two-mode group EDFA. In particular we quantify how the gain spectrum and BER performance are affected by input signal and pump power as required in the execution of our ongoing MDM transmission experiments.OCIS codes: (060.0060) Fiber optics and optical communications; (060.2320) Fiber optics amplifiers and oscillators. IntroductionTo date single mode fibers (SMFs) have been used as the transmission medium of choice in long-haul telecommunication systems, with the use of multimode fibers (MMFs) restricted to short distance (e.g. local area) networks due to their severe modal dispersion which grossly limits the transmission bandwidth. However, driven by fears of a future "capacity crunch", major interest is developing in the potential use of "mode division multiplexing (MDM)" in which selective mode excitation and detection schemes are used to define distinguishable information channels within a few mode fiber (FMF) [1][2][3]. Since the modes are orthogonal, it is in principle possible to increase the capacity in accordance with the number of modes supported by the FMF. Digital signal processing can be utilized to mitigate transmission impairments caused by mode-coupling in the MDM systems and thereby to substantially increase the achievable transmission distance. However, in order to be useful in long-haul systems a practical, high performance FMF amplifier is essential. In our recent work [4], we successfully demonstrated a multimode (two-mode group) erbium-doped fiber amplifier (MM-EDFA) for MDM applications providing simultaneous modal gains of ~20dB for different pair-wise combinations of spatial and polarization modes. However, in order to reliably use this device in full data transmission experiments a far more detailed understanding of how the amplifier performs under more fully loaded conditions (both in terms of DWDM channels across the Cband and the full set of supported modes) is required. In this paper, we report a detailed characterization of how the input signal power and pump power levels affect the spectral gain flatness and bit error rate (BER) performance and the optimum condition required to obtain the minimum power penalty are discussed. Note that the following characterization of the MM-EDFA was successfully used in the 96-channel, 73.7 Tbit/s MDM transmission experiments reported in our recent ECOC 2012 postdeadline paper [2].

show abstract

Section: Introductionmentioning

confidence: 99%