400Gb/s real-time coherent PON based on a silicon photonic integrated transceiver

Abstract

We experimentally demonstrate the real-time 100/200/400 Gb/s/λ coherent passive optical networks (PONs) based on silicon photonic integrated transceiver. We investigate different configuration schemes of coherent PONs including: (1) using a Erbium doped optical fiber amplifier (EDFA) as a booster at the transmitter side; (2) using a semiconductor optical amplifier (SOA) as a booster at the transmitter side; (3) using EDFA at the transmitter side and a pre-amplified SOA at receiver side; (4) using an SOA at the transmitter side and an SOA at the receiver side. The performance of these schemes for different data rates of downstream transmission is evaluated, and the appropriate choices under different circumstances are analyzed. The real-time experimental results indicate that the EDFA can be replaced by SOA as a booster at the transmitter side in 100/200 Gb/s/λ coherent PON based on the dual-polarization QPSK (DP-QPSK) scheme with a small performance penalty. In dual-polarization a 16 quadrature amplitude modulation (DP-16QAM) 400 G/s/λ PON system, EDFA booster is preferred because an SOA introduces more nonlinearity for the 16QAM scheme. The power budget of 32.5 dB is achieved for 400 Gb/s/λ coherent PON after the 20 km standard single mode fiber (SSMF) transmission under the soft-decision feedforward error correction (SD-FEC) threshold.

Comparison of Fabrication Methods for Fiber‐Optic Ultrasound Transmitters Using Candle‐Soot Nanoparticles

“…[ 19,39,42–44 ] Also, they can be applied onto both curved and planar macroscale substrates. [ 18,44–47 ] For example, CSNP‐PDMS composites were applied onto concave substrates such as lenses, for use in high intensity focused ultrasound, [ 18,19,45,48 ] a therapeutic modality with wide‐ranging medical applications including tumor therapy, [ 49 ] drug delivery, [ 50,51 ] and tissue ablation. [ 52,53 ] Many studies that have focused on developing CSNP composites for OpUS generation have demonstrated promising results when these composites have been produced as free‐standing membranes.…”

Simplified coherent receivers for passive optical networks

“…This area is another example where for high datarate applications coherent has an advantage. The IM/DD solutions previously presented use either an LMS equaliser with 640 taps [10] or a Volterra equaliser of 183 length [11] . For Alamouti coding, the DSP stack is similar to the full coherent receiver [16] , however due to the short reach nature of the PON network, the chromatic dispersion compensation filter is significantly shorter, or alternatively can be integrated into the LMS equalizer.…”

“…On the other hand, coherent technology has been proven at capacities significantly higher than 200 Gb/s even in PON applications [11] , however the cost of coherent transmitters and receivers are magnitudes higher than using IM/DD [1] . As a consequence, simplified coherent receivers have re-emerged as a research interest.…”