Results 1 to 10 of about 92 (86)
Fully integrated electrically driven optical frequency comb at communication wavelength [PDF]
Nanophotonics, Volume 11, Issue 13, Page 2989-3006, June 2022., 2022 Abstract To meet the high demand of data transmission capacity, optical communications systems have been developed. In order to increase the channel numbers for larger communication bandwidth, multi‐mode lasers and laser arrays can be used. As an alternative coherent light source, optical frequency comb (OFC) contains multi‐wavelength signal, and hence
Nanxi Li +6 more
wiley +2 more sources
High‐Q asymmetrically cladded silicon nitride 1D photonic crystals cavities and hybrid external cavity lasers for sensing in air and liquids [PDF]
Nanophotonics, Volume 11, Issue 18, Page 4183-4196, September 2022., 2022 Abstract In this paper we show a novel design of high Q‐factor silicon nitride (SiN) 1D photonic crystal (PhC) cavities side‐coupled to curved waveguides, operating with both silica and air cladding. The engineering of the etched 1D PhC cavity sidewalls angle allows for high Q‐factors over a wide range of upper cladding compositions, and the ...
Simone Iadanza +8 more
wiley +2 more sources
Research on the modulation format of 40Gb/s WDM-PON system [PDF]
MATEC Web of Conferences, 2022 In order to meet the transmission needs of WDM-PON system, a WDM-PON full-duplex system based on reflective semiconductor optical amplifier (RSOA) remodulation was constructed in this paper.
Wang Yilin, Zhang Chunlei
doaj +1 more source
Discretely Tunable (2594, 2629, 2670 nm) GaSb/Si3N4 Hybrid Laser for Multiwavelength Spectroscopy
Laser &Photonics Reviews, Volume 17, Issue 12, December 2023., 2023 A discretely tunable GaSb/Si3N4 hybrid photonic integrated circuit (PIC) laser is introduced for multiwavelength spectroscopy of CO2, H2S, and H2O. It emits mW‐level power at 2670.42, 2629.12, and 2594.27 nm. Wavelength tuning and switching are based on a novel architecture employing cascaded Mach–Zehnder interferometers and a distributed Bragg, which ...
Samu‐Pekka Ojanen +6 more
wiley +1 more source
Laser &Photonics Reviews, Volume 17, Issue 7, July 2023., 2023 A miniaturized high‐performance integrated laser exhibiting broad wavelength tuneability near a 2.6 µm wavelength region is demonstrated. The laser consists of a Si3N4 photonic integrated circuit incorporating a tunable reflector and a AlGaInAsSb/GaSb quantum‐well gain element.
Samu‐Pekka Ojanen +6 more
wiley +1 more source
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
Applied Sciences, 2021 The radio-over-fiber (RoF) technique has gained a lot of interest recently, as the millimeter-wave signals can be generated and delivered in the optical domain with the advantages of low attenuation, high capacity, and being free from electromagnetic ...
Amare-Mulatie Dehnaw +6 more
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
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