Results 21 to 30 of about 936 (145)
Chip‐based optical frequency combs for high‐capacity optical communications
Nanophotonics, Volume 10, Issue 5, Page 1367-1385, March 2021., 2021 Abstract Current fibre optic communication systems owe their high‐capacity abilities to the wavelength‐division multiplexing (WDM) technique, which combines data channels running on different wavelengths, and most often requires many individual lasers.
Hao Hu, Leif K. Oxenløwe
wiley +1 more source
IET Optoelectronics, Volume 15, Issue 1, Page 8-19, February 2021., 2021 ABSTRACT Numerical investigation was done for the response of two semiconductor optical amplifiers (SOA) to direct modulation using three of the most commonly employed intensity modulation formats: non‐return‐to‐zero (NRZ), duobinary (DB) and quaternary pulse amplitude modulation (PAM‐4).
Ramón Gutiérrez‐Castrejón +3 more
wiley +1 more source
Compact Wireless Access Nodes for WDM Bidirectional Radio-over-Fiber System Based on RSOA [PDF]
, 2009 We demonstrate a RSOA based WDM radio-over-fiber, bidirectional system for wireless access networks. The multi-functionalities of a RSOA, such as colorless operation, re-modulation and envelope detection, make wireless access nodes more ...
Xianbin Yu +5 more
core +1 more source
Applied Sciences, 2018 We demonstrate the feasibility of using a single microring resonator (MRR) as optical notch filter for enabling the direct modulation of a reflective semiconductor optical amplifier (RSOA) at more than tripled data rate than possible with the RSOA alone.
Zoe V. Rizou, Kyriakos E. Zoiros
doaj +1 more source
Crystals, 2021 We present a design methodology for hybrid lasers to realise mode-hop free operation by controlling the cavity mode spacing. In this study, a compact hybrid photonic crystal laser (H-PhCL) was employed which allowed a reduction of the Fabry–Perot length ...
Praveen K. J. Singaravelu +5 more
doaj +1 more source
MDM-TDM PON Utilizing Self-Coherent Detection-Based OLT and RSOA-Based ONU for High Power Budget
IEEE Photonics Journal, 2016 A cost-effective mode-division-multiplexing and time-division-multiplexing passive optical network (MDM-TDM PON) utilizing a self-coherent detection for upstream signal at optical line terminal (OLT) and a high-gain reflective semiconductor optical ...
Yuanxiang Chen +11 more
doaj +1 more source
IEEE Access, 2021 Network reliability is very important for the next generation of optical networks. In this paper, a highly reliable protection mechanism, which integrates the approaches of optical protection and microwave protection, is proposed for metro-access optical
Zerui Song +5 more
doaj +1 more source
RSOA Intensity Modulator Frequency Chirp-Enhanced Optical OFDM PON Performance
IEEE Photonics Journal, 2015 A reflective semiconductor optical amplifier intensity modulator (RSOA-IM) frequency chirp considerably increases the system frequency response of an intensity-modulation and direct-detection (IMDD) PON system over the passband signal spectral region ...
B. Y. Cao +5 more
doaj +1 more source
Coherent ONU based on 850 µm-long cavity-RSOA for next-generation ultra-dense access network [PDF]
, 2016 In this Letter, an efficient bidirectional differential phase-shift keying (DPSK)-DPSK transmission for a ultradense wavelength division-multiplexed passive optical network is proposed. A single distributed feedback laser at the optical network unit (ONU)
Cano Valadez, Iván Nicolás +4 more
core +1 more source
IEEE Photonics Journal, 2015 Owing to the lack of strong physical mechanisms capable of elaborately balancing a large number of longitudinal modes created in a self-seeded passive optical network (PON), the resulting coherent-like optical signals are vulnerable to frequency ...
M. L. Deng +7 more
doaj +1 more source