Accurate Millimeter-Wave Laser Phase Noise Measurement Technique

Relative intensity noise in optical heterodyning applied to millimeter-wave systems

“…The models of RIN ini (red curve in a small frame), RIN mmw (light curve), and phase noise (thick dashed curve) are a good agreement with the experimental results. According to equilibrium of optical power between M modes, it is very important to observe that the beat-note RIN mmw is not increased or decreased as compared to the initial RIN ini because of the factor I j /I i =1 as in (8) and (9), the value of RIN ini and RIN mmw is -130 dB/Hz. From this figure, the relaxation frequency of RIN ini and RIN mmw is approximately 5 GHz, so MMM RIN mmw is generated from initial RIN ini .…”

“…The fundamental features of this technique are the ability to generate signals on different frequencies and the capability to demonstrate several cases of RIN close to beat-note by varying the temperature and the relative optical power of the DFB lasers. Phase noise is large and previous results [8] are then used here to decorrelate RIN and phase noise impacts on MMW signal impairments. The second technique is based on Passively Mode Locked Laser Diode (PMLLD), where the Free Spectral Range (FSR) of an optical resonator at 60.64 GHz is used to generate the MMW signal.…”

Noise Characterization of an Optical Frequency Comb Using Offline Cross-Correlation

“…Recently new approaches based on digital measurements have attracted many attentions. For example, in [12], the authors present an accurate phase-noise measurement technique based on sampling and post-processing which is able to separate amplitude and phase noise measurements. However, when the phase noise of the device under test (DUT) All authors are with Aix Marseille Université, CNRS, PIIM, UMR 7345, 13397 Marseille, France email: ramin.khayatzadeh@univ-amu.fr, marie.houssin@univ-amu.fr.…”

Impact of Relative Intensity Noise on 60-GHz Radio-Over-Fiber Wireless Transmission Systems

“…The first technique uses two independent distributed feedback (DFB) lasers without any locking scheme which is the simplest and cheapest way. In this case, phase noise is larger than in other solutions and its measurement is presented using the technique in [17] to de-correlate RIN and phase noise impacts on resultant mm-wave signal. The second technique is based on a passively mode-locked laser diode (PMLLD) at 60.64 GHz to generate mm-wave signal with advantage of lower phase noise due to the correlation between optical modes of the PMLLD.…”

“…This paper is organized as follows: section II investigates the theory and experimental setup of RIN. In section III, experimental measurements of RIN are analyzed in [9][10][11][12][13][14][15][16][17][18][19] GHz] and in [50-62] GHz frequency ranges. A 60 GHz RoF wireless system is discussed in section IV, and finally the conclusion is presented in section V.…”