Title :
Accurate Millimeter-Wave Laser Phase Noise Measurement Technique
Author :
Khayatzadeh, Ramin ; Rzaigui, Habeb ; Poette, Julien ; Cabon, Beatrice
Author_Institution :
IMEP-LAHC, Inst. de Microelectron. Electromagn. et Photonique, Grenoble, France
Abstract :
In this letter, a method based on time sampling and signal processing is proposed to measure the phase noise of any unstable optically generated carrier. We could overcome the difficulties of measuring the phase noise of a passively mode-locked laser output signal with 60-GHz repetition frequency due to frequency instability by replacing a spectrum analyzer with a digital storage oscilloscope, which samples signal in time domain. A mathematical approach based on frequency demodulation is used to separate the phase noise and the amplitude noise in measurements. The precision of this method has been validated by comparing the measured results with the commercial tool measurements.
Keywords :
demodulation; digital storage oscilloscopes; fast Fourier transforms; laser frequency stability; laser mode locking; laser noise; laser variables measurement; microwave photonics; noise measurement; optical variables measurement; phase noise; photodiodes; sampling methods; signal processing; spectral analysers; amplitude noise; digital storage oscilloscope; fast Fourier transform; frequency demodulation; frequency instability; millimeter-wave laser phase noise measurement; passively mode-locked laser; phase noise; photodiode; signal processing; spectrum analyzer; time sampling; Fast Fourier Transform (FFT); Power Spectral Density (PSD); frequency demodulation; passively mode-locked laser diode (PMLLD); phase noise; radio over fiber (RoF);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2013.2263378
