Ultrawide Bandwidth Wavelength Monitor Based on a Pair of Tilted Fiber Bragg Gratings

Tissot, Y.; Limberger, H.G.; Salathé, R. P.

doi:10.1109/lpt.2007.905200

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…Optical spectrum analyzer (OSA) and optical performance monitor (OPM) are two important optical spectrum test instruments in CON. Many schemes focusing on hardware optimization have been proposed to realize wider dynamic range and stronger sensitivity in the optical power domain as well as broader wavelength ranges and higher resolution in the spectral domain [4]- [12]. These schemes were based on different techniques, including fiber Bragg grating [4], coherent detection [5], Brillouin fiber laser-based heterodyne detection [6], dual-comb…”

Section: Introductionmentioning

confidence: 99%

Machine Learning-Based Multifunctional Optical Spectrum Analysis Technique

Wang

Zhang

et al. 2019

IEEE Access

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A machine learning (ML)-based multifunctional optical spectrum analysis technique is proposed to perform not only the conventional analysis functions but also the extended analysis functions, including center wavelength detection, optical signal-to-noise (OSNR) calculation, bandwidth recognition, as well as spectral distortion diagnosis. We have investigated four widely used ML algorithms, including support vector machine (SVM), artificial neural network, k-nearest neighbors, and decision tree. First, the wavelengths, OSNRs, and bandwidths of optical signals are processed by four ML methods based on the spectral data. The good performance and fast processing speed are obtained, especially for SVM, achieving the optimal accuracy (100%) and the least test time. For the need of the practical application, we also investigate the more complicated case, where wavelength, OSNR, and bandwidth are variable simultaneously so that the ML should analyze these three parameters comprehensively. Even in this case, the overall accuracy is still larger than 99.1%. In addition, the extended analysis functions are also studied to diagnose the spectral distortion caused by the cascaded filtering effect and off-center filtering effect. The number of cascaded filters and the offsets of filter shift and laser drift can be effectively estimated by the SVM with high average accuracy and low standard deviation, which are useful for failure detection and distortion recovery. This technique has the potential to be applied in the optical spectrum analyzer to implement the multifunctional spectrum analysis or in the optical performance monitor to execute the spectral distortion diagnosis.

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Section: Introductionmentioning

confidence: 99%

Machine Learning-Based Multifunctional Optical Spectrum Analysis Technique

Wang

Zhang

et al. 2019

IEEE Access

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“…It is worth mentioning, among others, the solution of a problem with more than 10 million unknowns [4] using MLFMM, which implied an unprecedented breakthrough in computational electromagnetics. Later on, other significant advances have been achieved using MLFMM [5][6][7][8][9][10], although all of them have been burdened by the poor scalability of MLFMM [11]; so, the number of parallel processors used in these works has been limited to a handful of processors (16 to 32) which contrasts with the hundreds (even thousands) of processors available in modern supercomputers. …”

Section: Introductionmentioning

confidence: 99%

Effect of gate‐to‐source capacitance of high‐power Si‐LDMOS FET on the asymmetrical intermodulation and modulation bandwidth of base‐station amplifiers

Chung

2009

Micro & Optical Tech Letters

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This letter presents the effect of the gate‐to‐source capacitance (Cgs) on the imbalance of the intermodulation distortion (IMD) and modulation bandwidth of Si‐LDMOS field effect transistor (FET) high‐power base‐station PAs. It is revealed that the strong Cgs nonlinearity at the input gate of the LDMOS significantly contributes to the output intermodulation imbalance and plays an important role in determining the modulation bandwidth. The Volterra series analysis is used to qualitatively understand and describe the mechanism. The frequency‐sensitive baseband impedance, which is presented to Cgs and is proven to be one of the main factors to the imbalance in the analysis, is experimentally changed by manipulating the bias circuitry. The output IMD imbalance behavior is examined with two‐tone signals for the PA with the MRF5S18060 Si‐LDMOS FET. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2448–2451, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24597

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“…It can be applied to the wavelength measurement of lasers with high resolution. Fabry-Perot etalons and fiber Bragg gratings are popular for wavelength monitoring [11][12][13]. Our work will be an alternative method for wavelength measurement.…”

Section: Introductionmentioning

confidence: 99%

Frequency response of fiber ring resonator and its application in DFB laser wavelength variation measurement

Chen

Zhu

Ren

et al. 2009

Micro & Optical Tech Letters

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In this article, a novel K-shaped dual-band microstrip patch antenna with a shorting pin for dual-band , was designed, fabricated, and tested. The impedance bandwidths were 221 MHz (5.145-5.366 GHz) and 187 MHz (5.695-5.882 GHz), covering the required WLAN bandwidth (5.2/5.8 GHz). The gain obtained from 3.66 to 4.58 dBi matched the wireless LAN specifications. The results demonstrate that the proposed novel K-shaped dual-band microstrip patch antenna with a shorting pin can be applied to dual-band WLAN systems (5.2/5.8 GHz). ACKNOWLEDGMENTS

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Ultrawide Bandwidth Wavelength Monitor Based on a Pair of Tilted Fiber Bragg Gratings

Cited by 8 publications

References 13 publications

Machine Learning-Based Multifunctional Optical Spectrum Analysis Technique

Machine Learning-Based Multifunctional Optical Spectrum Analysis Technique

Effect of gate‐to‐source capacitance of high‐power Si‐LDMOS FET on the asymmetrical intermodulation and modulation bandwidth of base‐station amplifiers

Frequency response of fiber ring resonator and its application in DFB laser wavelength variation measurement

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