Terahertz source with broad frequency tunability up to 3.8 THz using MZ-FCG for frequency reference in phase-locking of THz source devices
I Morohashi, Y Irimajiri, M Kumagai… - … Topical Meeting on …, 2016 - ieeexplore.ieee.org
I Morohashi, Y Irimajiri, M Kumagai, A Kawakami, T Sakamoto, N Sekine, A Kasamatsu…
2016 IEEE International Topical Meeting on Microwave Photonics (MWP), 2016•ieeexplore.ieee.orgTo simultaneously stabilize a series of terahertz (THz) source devices, we propose the use
of optical combs as a frequency reference source. The optical combs provide a number of
equally-spaced cw lights with high accuracy, so that it is suitable for generation of a series of
frequency reference signals. To generate broadband optical combs, a combination of the
Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) and the highly nonlinear
dispersion shifted fiber was used. Optical two-tones were extracted from the broadband …
of optical combs as a frequency reference source. The optical combs provide a number of
equally-spaced cw lights with high accuracy, so that it is suitable for generation of a series of
frequency reference signals. To generate broadband optical combs, a combination of the
Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) and the highly nonlinear
dispersion shifted fiber was used. Optical two-tones were extracted from the broadband …
To simultaneously stabilize a series of terahertz (THz) source devices, we propose the use of optical combs as a frequency reference source. The optical combs provide a number of equally-spaced cw lights with high accuracy, so that it is suitable for generation of a series of frequency reference signals. To generate broadband optical combs, a combination of the Mach-Zehnder-modulator-based flat comb generator (MZ-FCG) and the highly nonlinear dispersion shifted fiber was used. Optical two-tones were extracted from the broadband optical combs by using a pair of optical tunable bandpass filters (TBPs). The optical two-tone was converted to THz waves by the unitraveling carrier photodiode (UTC-PD). As a result, THz waves with broad frequency tunability up to 3.8 THz were successfully demonstrated.
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