Enhanced Functionalities for AWGs

Cincotti, Gabriella

doi:10.1109/jlt.2015.2391995

Cited by 9 publications

(1 citation statement)

References 65 publications

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“…On the other hand, the AWG is a planar device that can generate and process up to N = 50 subcarriers in parallel, in a complete passive way [21,22], in addition, it can be integrated with modulators or photodetectors in Tb-capable transceivers [17]. The main limitation for the use of an AWG in an AO-OFDM system is the slab-diffraction effect, that affects the rectangular time waveform; however, this impairment can be compensated by an external modulator [12], or by a suitable tapering in the slab coupler [23]. To achieve a flexible bandwidth management, the OFDM subcarriers should be arbitrary assigned, and for this reason, we replace the AWG with a WSS at the TX.…”

Section: Introductionmentioning

confidence: 99%

Spectrally-efficient all-optical OFDM by WSS and AWG

Hoxha¹,

Morosi²,

Shimizu³

et al. 2015

Opt. Express

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We report on the transmission experiment of seven 12.5-GHz spaced all optical-orthogonal frequency division multiplexed (AO-OFDM) subcarriers over a 35-km fiber link, using differential quadrature phase shift keying (DQPSK) modulation and direct detection. The system does not require chromatic dispersion compensation, optical time gating at the receiver (RX) or cyclic prefix (CP), achieving the maximum spectral efficiency. We use a wavelength selective switch (WSS) at the transmitter (TX) to allow subcarrier assignment flexibility and optimal filter shaping; an arrayed waveguide grating (AWG) AO-OFDM demultiplexer is used at the RX, to reduce the system cost and complexity.

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Section: Introductionmentioning

confidence: 99%