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Learned Signal-to-Noise Ratio Estimation in Optical Fiber Communication Links [PDF]
IEEE Photonics Journal, 2022 This paper proposes a signal-to-noise ratio (SNR) estimator based on recurrent neural network (RNN) in optical fiber communication links. The proposed estimator jointly estimates the linear and nonlinear components of the SNR.
Mohamed Al-Nahhal +5 more
doaj +3 more sources
arXiv, 2017 We introduce a new nonlinear analog optical computing concept that compresses the signal's dynamic range and realizes non-uniform quantization that reshapes and improves the signal-to-noise ratio in the digital domain.
Jalali, Bahram, Jiang, Yunshan
arxiv +3 more sources
Sagnac Interferometer Enhanced Particle Tracking in Optical Tweezers [PDF]
, 2010 A setup is proposed to enhance tracking of very small particles, by using optical tweezers embedded within a Sagnac interferometer. The achievable signal-to-noise ratio is shown to be enhanced over that for a standard optical tweezers setup. The enhancement factor increases asymptotically as the interferometer visibility approaches 100%, but is capped ...
Berne B J +9 more
arxiv +3 more sources
Photonics, 2022 Relative intensity noise (RIN) is an important factor that determines the performance of optical phased arrays (OPA) that are configured using semiconductor lasers as light emission sources. This study proposes a method of improving the optical signal-to-
Anh-Hang Nguyen, Hyuk-Kee Sung
doaj +1 more source
Principle and Application of the C-OTDR
Guangtongxin yanjiu, 2022 The traditional Optical Time Domain Reflectometry (OTDR) technology uses back Rayleigh scattering power for fiber detection. In transmission lines with optical amplifier, Erbium-Doped Fiber Amplifiers (EDFA) are mostly used to compensate for the loss of ...
Zhong-hua LIU +3 more
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Applied Sciences, 2021 The electro-optical process is a popular method for terahertz radiation detection. Detectors based on the electro-optical process have large bandwidth, and the signal-to-noise ratio (SNR) is relatively high.
Adnan Haj Yahya +4 more
doaj +1 more source
120 km Long-distance Distributed Optical Fiber Vibration Sensing System
Guangtongxin yanjiu, 2021 Aiming at the application of ultra-long-distance monitoring in scenarios such as power transmission lines, this article uses Raman amplification and heterodyne detection based on a distributed optical fiber phase sensitive Optical Time Domain ...
Shen JIN +4 more
doaj +1 more source
Signal-to-noise ratio in nonlinear optical amplification process [PDF]
SPIE Proceedings, 1990 In this communication, one looks at the influence of the saturation process over the statistical fluctuations (signal to noise ratio) of the optical power at the output of a travelling wave semiconductor optical amplifier (TWOA) . The statistical behaviour of this device is described starting from the photon density matrix equation.
M. J. Soneira +2 more
openaire +4 more sources
Improving Linewidth and Extinction Ratio Performances of Lithium Niobate Ring Modulator Using Ring-pair Structure [PDF]
advanced photonics research 2024, 2023 Electro-optic modulators lie at the heart of complex integration and high density electro-optic systems. One of the representative electro-optic modulators is thin film lithium niobate based microring modulator which has demonstrated advantages of compact footprint, low optical loss and high modulation efficiency.
arxiv +1 more source
On the design of low phase noise and flat spectrum optical parametric frequency comb
APL Photonics, 2023 Optical frequency combs (OFCs) have become increasingly pervasive in recent years, with their advantageous frequency coherence properties enabling significant developments in numerous fields, such as optical communications, spectroscopy, and microwave ...
Yijia Cai +4 more
doaj +1 more source