Low phase noise buffer‐reused BiCMOS oscillator
Sign Up to like & getrecommendations! Published in 2021 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.32867
Abstract: This letter presents a lower phase noise voltage‐controlled oscillator (VCO) uses two differential amplifiers in cross‐coupled feedback and is named as a buffer‐reused VCO in the TSMC standard 0.18 μm SiGe BiCMOS processes. The die area… read more here.
Keywords: phase noise; phase; buffer reused; oscillator ... See more keywords
OFDM tolerance to additive white Gaussian and laser phase noises in optical heterodyning systems accompanied by the feasible pilot-assisted equalization
Sign Up to like & getrecommendations! Published in 2020 at "Optical Review"
DOI: 10.1007/s10043-020-00587-8
Abstract: It is well known that the performance of orthogonal frequency division multiplexing (OFDM) is limited by phase noise, which depends on the laser linewidths for coherent-detection radio over fiber (RoF) systems. In this manuscript, we… read more here.
Keywords: phase; pilot; additive white; ofdm ... See more keywords
Phase noise reduction in LC cross coupled oscillators using sinusoidal tail current shaping technique
Sign Up to like & getrecommendations! Published in 2018 at "Analog Integrated Circuits and Signal Processing"
DOI: 10.1007/s10470-018-1181-x
Abstract: In this paper, using the concept of impulse sensitivity function (ISF) in Hajimiri’s phase noise model, a novel circuit method for phase noise reduction in LC cross coupled oscillators is proposed. Based on the proposed… read more here.
Keywords: cross coupled; phase noise; noise; noise reduction ... See more keywords
A low phase noise quadrature VCO using superharmonic injection, current reuse, and negative resistance techniques in CMOS technology
Sign Up to like & getrecommendations! Published in 2019 at "Analog Integrated Circuits and Signal Processing"
DOI: 10.1007/s10470-018-1380-5
Abstract: In this article, a low phase noise quadrature VCO (QVCO) is proposed, which uses superharmonic injection and current reuse techniques to reduce phase-noise and power consumption. The LC tank circuit quality factor is improved, using… read more here.
Keywords: superharmonic injection; phase noise; phase; current reuse ... See more keywords
Analysis of oscillator phase noise effect on high order QAM links
Sign Up to like & getrecommendations! Published in 2020 at "Analog Integrated Circuits and Signal Processing"
DOI: 10.1007/s10470-020-01701-1
Abstract: In this work, the effect of oscillator phase noise on the bit error rate (BER) for high order QAM communication systems is analyzed. Two high frequency oscillators are designed, built and tested to get real… read more here.
Keywords: effect; oscillator phase; phase; phase noise ... See more keywords
Suppressing laser phase noise in an optomechanical system
Sign Up to like & getrecommendations! Published in 2021 at "Frontiers of Physics"
DOI: 10.1007/s11467-021-1097-2
Abstract: We propose a scheme to suppress the laser phase noise without increasing the optomechanical single-photon coupling strength. In the scheme, the parametric amplification terms, created by Kerr and Duffing nonlinearities, can restrain laser phase noise… read more here.
Keywords: suppressing laser; phase noise; laser phase;
Statistical characteristics and the supperission technique of laser phase noise
Sign Up to like & getrecommendations! Published in 2019 at "Optik"
DOI: 10.1016/j.ijleo.2018.10.171
Abstract: Abstract In order to achieve the coherent combining of two individual lasers, the relationship between two lasers should be determined. Since the phase noise is one of the primary reasons that cause the randomness of… read more here.
Keywords: phase noise; phase; laser phase; statistical characteristics ... See more keywords
Photonic generation and theoretical investigation of phase noise in quadrupling and 12-tupling millimeter wave Signal using optical self-heterodyne system
Sign Up to like & getrecommendations! Published in 2021 at "Optik"
DOI: 10.1016/j.ijleo.2021.166432
Abstract: Abstract In this paper, photonic generation of quadrupling and twelve-tupling millimeter wave signal using single radio frequency (RF) signal is proposed. The purity of generated signal is observed by using mathematical approach which is further… read more here.
Keywords: system; wave signal; tupling millimeter; phase noise ... See more keywords
All-fiber transient phase noise characterization of polarization maintaining Yb-doped fiber amplifiers
Sign Up to like & getrecommendations! Published in 2021 at "Optik"
DOI: 10.1016/j.ijleo.2021.167282
Abstract: Abstract We demonstrated an all-fiber phase noise measurement technique to detect transient phase variation of polarization maintaining Yb-doped fiber amplifier based on active phase locking of an optical heterodyne detection system. The root mean square,… read more here.
Keywords: phase noise; transient phase; maintaining doped; polarization maintaining ... See more keywords
Impact of linear coupling on nonlinear phase noise in two-core fibers
Sign Up to like & getrecommendations! Published in 2017 at "Optics Communications"
DOI: 10.1016/j.optcom.2017.02.020
Abstract: Abstract We study the effect of linear coupling on nonlinear phase noise in two-core fibers (TCFs). Considering the elementary TCF switching process, we demonstrate reduction of nonlinear phase noise in the propagation of optically amplified… read more here.
Keywords: linear coupling; coupling nonlinear; noise two; nonlinear phase ... See more keywords
A novel transmitter IQ imbalance and phase noise suppression method utilizing pilots in PDM CO-OFDM system
Sign Up to like & getrecommendations! Published in 2018 at "Optics Communications"
DOI: 10.1016/j.optcom.2017.12.022
Abstract: Abstract In this paper, we develop a novel pilot structure to suppress transmitter in-phase and quadrature (Tx IQ) imbalance, phase noise and channel distortion for polarization division multiplexed (PDM) coherent optical orthogonal frequency division multiplexing… read more here.
Keywords: imbalance; phase; system; method ... See more keywords