Phase noise and dynamic range of analog fiber links using electroabsorption modulators

1996 ◽  
Author(s):  
Robert B. Welstand ◽  
Richard J. Orazi ◽  
Chen K. Sun ◽  
Hemonth G. Rao ◽  
Yet Zen Liu ◽  
...  
Keyword(s):  
Phase Noise ◽  
Dynamic Range ◽  
Electroabsorption Modulators ◽  
Fiber Links

scholarly journals Implementation of a Cross-Spectrum FFT Analyzer for a Phase-Noise Test System in a Low-Cost FPGA

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Patrick Fleischmann ◽  
Heinz Mathis ◽  
Jakub Kucera ◽  
Stefan Dahinden
Keyword(s):  
Phase Noise ◽  
Cross Correlation ◽  
Dynamic Range ◽  
Low Cost ◽  
Test System ◽  
Low Noise ◽  
Noise Levels ◽  
High Quality ◽  
Cross Spectrum ◽  
The Cross

The cross-correlation method allows phase-noise measurements of high-quality devices with very low noise levels, using reference sources with higher noise levels than the device under test. To implement this method, a phase-noise analyzer needs to compute the cross-spectral density, that is, the Fourier transform of the cross-correlation, of two time series over a wide frequency range, from fractions of Hz to tens of MHz. Furthermore, the analyzer requires a high dynamic range to accommodate the phase noise of high-quality oscillators that may fall off by more than 100 dB from close-in noise to the noise floor at large frequency offsets. This paper describes the efficient implementation of a cross-spectrum analyzer in a low-cost FPGA, as part of a modern phase-noise analyzer with very fast measurement time.

Phase noise insensitive measurements of the nonlinear refractive index in fiber links

1999 ◽  
Vol 162 (4-6) ◽  
pp. 333-339 ◽  
Author(s):  
Andrea Fellegara ◽  
Andrea Melloni ◽  
Paolo Sacchetto
Keyword(s):  
Refractive Index ◽  
Phase Noise ◽  
Nonlinear Refractive Index ◽  
Fiber Links

Dynamic range of an optical amplifier cascade in an ASK system with significant phase noise

1992 ◽  
Vol 4 (12) ◽  
pp. 1354-1357 ◽  
Author(s):  
J. Farre ◽  
E. Bodtker ◽  
G. Jacobsen ◽  
K.E. Stubkjaer
Keyword(s):  
Phase Noise ◽  
Dynamic Range ◽  
Optical Amplifier ◽  
Significant Phase
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