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

doi:10.1587/transele.E96.C.241

Special Section on Recent Progress in Microwave and Millimeter-Wave Photonics Technology

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

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Keywords: phase noise, millimeter wave, radio-over-fiber, two free-running lasers, Mach-Zehnder modulator

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2013 Volume E96.C Issue 2 Pages 241-244

DOI https://doi.org/10.1587/transele.E96.C.241

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Abstract

We evaluated the single side-band phase noise of a 40GHz 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 -95.22dBc/Hz at a 10kHz offset frequency, respectively.

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