Phase-Locked THz-frequency Synthesis Using Optical Frequency Comb

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					          Phase-Locked THz-frequency Synthesis Using
               Optical Frequency Comb Generator
THz-frequency difference measurement using an optical frequency comb




                           f THz = ν1 − ν0 = kf m + f b
System for phase-locked THz-frequency synthesis



            LD
                                                             UTC-PD,
        ν0                                                   PC antenna,
                                                             Nonlinear crystal,
                             OFCG                            etc.
                     fm
       Tunable
         LD
       ν1
                                  PD
                     PLL


Optical frequency comb generator
(OFCG) is a useful device for photonic
THz-wave generation as an absolute
optical frequency grid. OFCG creates
a broad comb of equally spaced
frequencies, and the comb has rigid
phase differences.
                                                 Beat signal spectrum under optical phase-
OFCG and a phase-locked tunable                  locked condition.
                                                 fTHz=0.487THz [M.Kourogi, K.Nakagawa,
laser realize absolute THz-frequency             M.Ohtsu, IEEE J. Quantum Electron., 29,
synthesis up to several THz.                     2693 (1993)]


Optical Comb, Inc.   Tel: 03-5734-2337           Fax: 03-5734-2327
                     E-mail: info@optocomb.com   URL: http://www.optocomb.com