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Phase Noise Measurement of Optical Heterodyning Two-Tone Signal Generated by Two Free-Running Lasers
Ryuta YAMANAKA Taka FUJITA Hideyuki SOTOBAYASHI Atsushi KANNO Tetsuya KAWANISHI
IEICE TRANSACTIONS on Electronics
Publication Date: 2013/02/01
Online ISSN: 1745-1353
Print ISSN: 0916-8516
Type of Manuscript: BRIEF PAPER
phase noise, millimeter wave, radio-over-fiber, two free-running lasers, Mach-Zehnder modulator,
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We evaluated the single side-band phase noise of a 40 GHz beat signal generated by two free-running lasers. This allowed us to verify the utility of the two free-running lasers is verified as a light source for a next-generation radio-over-fiber system using frequency such as those in the millimeter-wave and terahertz bands. We also measured the phase noise of a frequency quadrupler using a Mach-Zehnder modulator for comparison. The phase noise of the two free-running lasers and the frequency quadrupler are -63.85 and -95.22 dBc/Hz at a 10 kHz offset frequency, respectively.