학술논문
Accurate Millimeter-Wave Laser Phase Noise Measurement Technique
Document Type
Periodical
Author
Source
IEEE Photonics Technology Letters IEEE Photon. Technol. Lett. Photonics Technology Letters, IEEE. 25(13):1218-1221 Jul, 2013
Subject
Language
ISSN
1041-1135
1941-0174
1941-0174
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.