Results 41 to 50 of about 35,515 (166)
SURVEY OF HYBRID EDFA/RAMAN IN C AND L BANDS
Revista Ingeniería, Matemáticas y Ciencias de la Información, 2017 Optical amplifiers have had a breakthrough in recent years. Initially, amplification of optical signals was performed passing the optical signal to the electrical domain, then the amplified signal back again to the optical domain.
JUAN DAVID BONILLA
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IET Science, Measurement & TechnologyOne of the most common methods to protect electronic and telecommunication systems in a high‐power electromagnetic (HPEM) environment is using a conductive enclosure.
Ali Kalantarnia, Abdollah Mirzabeigi
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Performance Comparison of Single-Pump FOPA and LRA in a 16-channel DWDM Transmission System
Elektronika ir Elektrotechnika, 2019 Raman amplifiers and Fiber optical parametric amplifiers (FOPA) are positioned as the main future leading techniques for all-optical signal amplification. Distributed Raman amplifiers are known as the least noisy, but this type of amplifiers suffers from
Sergejs Olonkins +2 more
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PhotonicsWe reported on a nanosecond regenerative amplified laser with a repetition rate of 1 kHz by employing laser diodes (LDs) with distinct wavelengths as both the seed laser and the pump source and utilizing Nd:YAG as the gain medium. The single-pulse energy
Mengyao Cheng +4 more
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Micromachines, 2019 Point-of-care ultrasound systems are widely used in ambulances and emergency rooms. However, the excessive heat generated from ultrasound transmitters has an impact on the implementation of piezoelectric transducer elements and on battery consumption ...
Hojong Choi
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Electronics LettersThis article presents a 12b 500MS/s successive‐approximation‐register‐assisted pipeline analogue‐to‐digital converter. By adopting a new auto‐zero scheme, a calibration‐free four‐stage ring residue amplifier with a small offset cancellation capacitor is ...
Linghao Liu, Junyan Ren, Fan Ye
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Photonic crystal fiber amplifiers for high power ultrafast fiber lasers
Nanophotonics, 2013 In recent years, ultrafast laser systems using large-mode-area fiber amplifiers delivering several hundreds of watts of average power has attracted significant academic and industrial interest.
Alkeskjold Thomas T. +8 more
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An Ultra‐Wideband Low Noise Colpitts VCO Using SiGe Bi‐CMOS Technology
The Journal of EngineeringAn ultra‐wideband voltage‐controlled oscillator (VCO) based on the Colpitts structure is proposed in this work. The entire circuit consists of four Colpitts VCO cores operating at different frequencies.
PeiYing Cai +4 more
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Low NF Active Quasi‐Circulator Design Based on Noise Suppression Technique
IET Microwaves, Antennas & PropagationIn this paper, an active quasi‐circulator (QC) exhibiting a low noise figure (NF) of 1.1 dB is presented, which is composed of two couplers, three connecting transmission lines (TLs) and a nonreciprocal stage.
Zhan Chen, Chunxia Zhou, Wen Wu
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Research and design of transient pulse damage in high-power RF amplifier
Dianzi Jishu YingyongDue to a variety of imperceptible design defects，high-power RF amplifiers are prone to transient pulse, which has a significant impact on the reliability and service life of the hardware，and seriously interfere with the quality of work.
Xu Hao
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