Results 11 to 20 of about 540 (125)

Theoretical Analysis of Directly Modulated Reflective Semiconductor Optical Amplifier Performance Enhancement by Microring Resonator-Based Notch Filtering

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   +3 more sources

Fully integrated electrically driven optical frequency comb at communication wavelength. [PDF]

Nanophotonics, 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
Li N, Chen G, Lim LW, Ho CP, Xue J, Fu YH, Lee LYT.   +6 more
europepmc   +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, 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 ...
Iadanza S, Mendoza-Castro JH, Oliveira T, Butler SM, Tedesco A, Giannino G, Lendl B, Grande M, O'Faolain L.   +8 more
europepmc   +2 more sources

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, Jukka Viheriälä, Nouman Zia, Eero Koivusalo, Joonas Hilska, Heidi Tuorila, Mircea Guina   +6 more
wiley   +1 more source

Widely Tunable (2.47–2.64 µm) Hybrid Laser Based on GaSb/GaInAsSb Quantum‐Wells and a Low‐Loss Si3N4 Photonic Integrated Circuit

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, Jukka Viheriälä, Nouman Zia, Eero Koivusalo, Joonas Hilska, Heidi Tuorila, Mircea Guina   +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

Performance analysis of a directly modulated semiconductor optical amplifiers using non‐return‐to‐zero, duobinary and quaternary pulse amplitude modulation signalling

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, Osvaldo Fernández‐Segura, Pablo Torres‐Ferrera, Daniel Enrique Ceballos‐Herrera   +3 more
wiley   +1 more source

Packet equalisation in PONs using adjustable gain-clamped semiconductor optical amplifiers (AGC-SOA) [PDF]

, 2011
The past ten years have witnessed a dramatic growth in the delivery of high bandwidth services through Passive Optical Networks (PONs), directly to the home or to the kerb.
Andonovic, Ivan, Kelly, A E, Liu, Lin, Michie, Walter   +3 more
core   +1 more source

REAM intensity modulator-enabled 10Gb/s colorless upstream transmission of real-time optical OFDM signals in a single-fiber-based bidirectional PON architecture [PDF]

, 2012
Reflective electro-absorption modulation-intensity modulators (REAM-IMs) are utilized, for the first time, to experimentally demonstrate colorless ONUs in single-fiber-based, bidirectional, intensity-modulation and direct-detection (IMDD), optical OFDM ...
Chow, E. Hugues-Salas, Giddings, Giddings, Hugues-Salas, Hugues-Salas, J. M. Tang, Jin, Jin, Kaneko, Kani, Lach, Lin, Ossieur, R. P. Giddings, S. Walker, Shin, T. Quinlan, Wei, Wei, X. Q. Jin, Y. Hong   +21 more
core   +1 more source

Semiconductor optical amplifiers in avionics [PDF]

, 2011
RSOAs have been demonstrated to operate within a WDM PON architectures over a >;60nm wavelength range with large path loss capabilities. Two RSOAs enable contiguous operation over the S, C and L bands; results indicate clearly that WDM architectures ...
Andonovic, Ivan, Johnstone, Walter, Kelly, Anthony, Michie, Walter, Murphy, Eoin, White, Henry   +5 more
core   +1 more source