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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 12 — Jun. 15, 2013
  • pp: 2137–2139

Microwave synthesis from a continuous-wave terahertz oscillator using a photocarrier terahertz frequency comb

Shigeo Nagano, Hiroyuki Ito, Motohiro Kumagai, Masatoshi Kajita, and Yuko Hanado  »View Author Affiliations

Optics Letters, Vol. 38, Issue 12, pp. 2137-2139 (2013)

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We report low-noise microwave synthesis from radiation with a frequency of 0.3 THz using a photocarrier frequency comb in a photoconductive antenna. The synthesized microwave signal at 1 GHz is phase coherent to the 0.3 THz radiation and has a fractional instability of 1×1015 within 300 s averaging times and single-sideband phase noise of 105dB/Hz at a 100 Hz offset from the carrier. This terahertz (THz)-to-microwave synthesizer is capable of being a THz frequency divider, which would be indispensable to not only THz metrology but also future high-speed wireless networks.

© 2013 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(140.4050) Lasers and laser optics : Mode-locked lasers
(040.2235) Detectors : Far infrared or terahertz
(060.5625) Fiber optics and optical communications : Radio frequency photonics

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: April 11, 2013
Manuscript Accepted: May 8, 2013
Published: June 12, 2013

Shigeo Nagano, Hiroyuki Ito, Motohiro Kumagai, Masatoshi Kajita, and Yuko Hanado, "Microwave synthesis from a continuous-wave terahertz oscillator using a photocarrier terahertz frequency comb," Opt. Lett. 38, 2137-2139 (2013)

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