Optical Carrier transmission rates

About: Optical Carrier transmission rates is a research topic. Over the lifetime, 2463 publications have been published within this topic receiving 33293 citations.

Polarization Division Multiplexing-Based Hybrid Microwave Photonic Links for Simultaneous mmW and Sub-6 GHz Wireless Transmissions

Abstract: A new hybrid microwave photonic link based on a polarization division multiplexing Mach-Zehnder modulator (PDM-MZM) is proposed. The link enables co-transmission of millimeter-wave (mmW) and sub-6 GHz wireless signals over a seamless single-mode fiber (SMF) and free-space optics (FSO) channels. Optimization of the chromatic dispersion (CD)-induced power fading regardless of the power fading due to the non-deterministic atmospheric turbulence (AT) is simultaneously demonstrated. Extensive simulation analysis is first presented to examine (i) the impact of CD on mmW (25 GHz) and sub-6 GHz (2.6 GHz) signals, envisioned for the 5th generation networks, and (ii) optimization of CD-induced power fading by changing the phase relations between the optical carrier and optical sidebands in each polarization channel using single tunable polarization controller. A proof-of-concept experiment is finally performed to simultaneously deliver 25 GHz and 2.6 GHz signals with 4/16/64-quadrature amplitude modulation over (i) 20 km SMF and 2 m radio wireless link and (ii) 20 km SMF, 4.2 m FSO (with AT) and 2 m radio wireless links. The optimization of the CD-induced power fading is experimentally verified and link performance shows high tolerance to CD with no power penalties and the measured error vector magnitudes well below the required limits. The predicted bit error rates are also below the forward error correction threshold of $2 \times {10^{ - 4}}$ .

Approaching Terabits Per Carrier Metro-Regional Transmission Using Beyond-100GBd Coherent Optics With Probabilistically Shaped DP-64QAM Modulation

Abstract: This research work proposed and experimentally demonstrated beyond-100GBd probabilistically shaped coherent optics that support the transmission of a ~1.2 Tbps coded line rate and a ~0.9 Tbps net bit rate per optical carrier over metro-regional distances. Pursuing next-generation transmission systems having both high capacity approaching terabits per wavelength and high spectral efficiency require engineering efforts from different aspects, which may include the enhancement of analog-to-digital or digital-to-analog interfaces, the improvement of channel characteristics, and also the realization of better receiver sensitivities, preferably through DSP techniques such as probabilistic shaping (PS). By doing so, this work achieved a single-channel and a 112.5-GHz WDM transmission of 900G wavelengths over 800 and 400 km, respectively, which employed a PS DP-64QAM modulation format at 105 GBd, yielding a net spectral efficiency of 8.05 bits/s/Hz. Such a high symbol rate was demonstrated using a commercially available DAC unit without band-interleaving. The enhanced optical channel consists of ITU-T G.654 compliant Terawave SLA+ fiber spans with the backward-pumped Raman amplifiers. In addition, with the same PS DP-64QAM modulation format and the same enhanced channel, this research work also demonstrated that 400G wavelengths can be delivered over 2800 km supporting long-haul applications.

The self-started 10 GHz harmonic mode-locking of a hybrid weak-resonant-cavity laser diode and fiber ring link

Abstract: A self-started harmonic mode-locking of a hybrid weak-resonant-cavity Fabry–Perot laser diode and fiber ring link is demonstrated to serve as a pulsed optical for future 10 Gb s−1 RZ data transmission. Beginning with the optical injection-locking rate equation describing the optoelectronic oscillator structure, the pulsewidth formula in the active mode-locking theory is modified and illuminates the shortening of the pulsewidth as a function of the optical feedback ratio and the microwave power gain. The pulsewidth is narrower with the higher optical injection power and the higher microwave power gain because of the gain saturation of the laser diode and the increase of the modulation depth. The lowest jitter and pulsewidth of the pulse train are 0.9 ps and 20 ps, respectively. With the higher microwave power gain, the SNR and ER are improved up to 10.2 dB and 13.8 dB, respectively, due to the enhancement of the peak power and the elimination of the residual carrier. Under the optimized operation condition, the pulsed optical carrier can be externally encoded at 10 Gbit/s for RZ-OOK data transmission.

Electro-optical assembly for silicon photonic chip and electro-optical carrier

Abstract: An electro-optical device and method of assembly is disclosed. A first unit of the electro-optical device is positioned with respect to a second unit of the electro-optical device to pre-align an optical communication pathway between the first unit and the second unit. The first unit is positioned with respect to the second unit to pre-align an electrical communication pathway between the first unit and the second unit. The first unit is bonded to the second unit to assemble the electro-optical device to establish optical communication and electrical communication between the first unit and the second unit.