Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel [PDF]
, 2008 An expression for the bit error rate of a multiple subcarrier intensity-modulated atmospheric optical communication system employing spatial diversity is derived. Spatial diversity is used to mitigate scintillation caused by atmospheric turbulence, which
Ghassemlooy, Zabih +9 more
core +1 more source
Applied Sciences, 2020 We consider an integrated electro-absorption modulator within a coupled-cavity VCSEL structure (EAM-VCSEL). We derive expressions for the modulation transfer function (MTF) of the EAM-VCSEL for small-signal modulation of either VCSEL injection current or
Krassimir Panajotov, Richard Schatz
doaj +1 more source
Experimental investigation of the performance of different modulation techniques under controlled FSO turbulence channel [PDF]
, 2010 This paper experimentally investigates and compares the performance of the free space optics system employing three different modulation schemes, on-off keying (OOK) with nonreturn- to-zero (NRZ) and return-to-zero (RZ) and the binary phase shift keying (
Z. Ghassemlooy +12 more
core +1 more source
All-Optical Modulation Characteristics of a Microfiber Coupler Combined Sagnac Loop
IEEE Photonics Journal, 2019 In this paper, we theoretically and experimentally investigate the all-optical modulation characteristics of a microfiber coupler combined Sagnac loop (MCSL).
Yang Yu +5 more
doaj +1 more source
Intensity-Modulated Polymer Optical Fiber-Based Refractive Index Sensor: A Review
Sensors, 2021 The simple and highly sensitive measurement of the refractive index (RI) of liquids is critical for designing the optical instruments and important in biochemical sensing applications.
Chuanxin Teng +6 more
doaj +1 more source
Analysis and Experimental Study of a Silicon Photonic Single MRM-Assisted MZI PAM-4 Modulator
IEEE Photonics Journal, 2017 We report on the analysis and experimental study of a silicon photonic single microring modulator (MRM) assisted Mach–Zehnder interferometer for high-speed four-level pulse amplitude modulation (PAM-4).
Rui Li +7 more
doaj +1 more source
Characterization of frequency drift of sampled-grating DBR laser module under direct modulation [PDF]
, 2008 The authors demonstrate the drift in frequency of a static sampled-grating distributed Bragg reflector (SG DBR) laser module when it is subjected to direct modulation.
Anandarajah, Prince M. +13 more
core +3 more sources
D-Shaped POF Sensors for Refractive Index Sensing—The Importance of Surface Roughness
Sensors, 2019 In this study the influence of the surface roughness on the transmission capacities of D-shaped plastic optical fibers (POFs) and sensors performance was investigated. Five D-shaped POF sensors were produced and characterized for refractive index sensing
Filipa Sequeira +5 more
doaj +1 more source
Intensity dependent residual amplitude modulation in electro-optic phase modulators
, 2012 Residual amplitude modulation (RAM) mechanisms in electro-optic phase modulators are detrimental in applications that require high purity phase modulation of the incident laser beam.
Jaatinen, Esa, Sathian, Juna
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Therapeutic Apheresis and Dialysis, EarlyView.ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo +5 more
wiley +1 more source