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Volume 46, Issue 2
Special Issue on Increasing Diversity of Optical Frequency Comb Devices
Displaying 1-8 of 8 articles from this issue
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Special Issue on Increasing Diversity of Optical Frequency Comb Devices
Special Issue
Laser Review
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Takasumi TANABE2018 Volume 46 Issue 2 Pages 59-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSDownload PDF (232K) -
Hajime INABA, Sho OKUBO, Masato WADA2018 Volume 46 Issue 2 Pages 61-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSWe describe frequency stability improvements and evaluations of optical frequency comb. We also outline the limiting factors and solutions for the stability improvement and describe a latest effort to obtain ultimate frequency stability.View full abstractDownload PDF (674K) -
Norihiko NISHIZAWA, Lei JIN2018 Volume 46 Issue 2 Pages 67-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSBased on our work, we reviewed the development of an near-infrared (NIR) to mid-infrared (MIR) optical frequency comb source based on passively mode-locked fiber lasers. An octave spanning supercontinuum comb was developed using a stabilized Er doped fiber laser comb, a similariton amplifier, and highly nonlinear fibers. We achieved an environmentally stable, all-polarization maintaining fiber laser comb with fiber laser using carbon nanotube saturable absorber, and investigated an offset free, MIR comb source based on a high power Yb fiber laser and a DFG in a nonlinear crystal. Finally, recent progress and future prospects were briefly discussed.View full abstractDownload PDF (1518K) -
Tatsutoshi SHIODA2018 Volume 46 Issue 2 Pages 73-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSWe applied an optical frequency comb synthesizer and analyzer to ultrafast arbitrary waveform generation and its analysis in the Terabit/s speed range and demonstrated optical signal processing of phase shift-keying in addition to amplitude modulation signals. Our proposed system, which can acquire the spectral phase parallel on a frequency axis, confirmed its advantage over dispersion spectrum measurement.View full abstractDownload PDF (2522K) -
Atsushi ISHIZAWA, Tadashi NISHIKAWA, Kenichi HITACHI, Hideki GOTOH2018 Volume 46 Issue 2 Pages 80-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSWe demonstrated that an electro-optic-modulation (EOM) comb can work as a noise booster and a highsensitivity detector for detecting the magnified noise from microwave and millimeter-wave signal generators (SGs). Our method can generate low-noise and continuously frequency-variable microwave and millimeter-wave signals. In addition, we can overcome the disadvantage of the EOM comb. The noise in 25-GHz signals can be reduced to ‒110dBc/Hz at a 1-kHz offset frequency from the center frequency. The noise with our method is one-hundred times lower than the lowest noise reported for commercially available SGs. Even lower noise will be achieved if we use a reference laser that is further away from the center frequency of the seed laser. In addition, the output frequency of microwave and millimeter-wave signal generators can be expanded for their universal use. We succeeded in generating low-noise signals at continuously variable frequencies over the range from 6 to 72 GHz.View full abstractDownload PDF (1295K) -
Takasumi TANABE, Ryo SUZUKI, Shun FUJII, Akihiro KUBOTA, Atsuhiro ...2018 Volume 46 Issue 2 Pages 86-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSWe will review recent activities on frequency comb generation in a microcavity, often refereed as microcomb or Kerr comb. Different methods for obtaining phase locked and soliton states are shown. We also discuss on the effect of opto-mechanical coupling that is present in a high quality factor toroid microcavity. Stimulated Raman scattering and third harmonic generation are key phenomenon to obtain broader bandwidth light using a single device. Recent advancement and perspective of micro-comb technologies are discussed.View full abstractDownload PDF (601K) -
Sho KASUMIE, Yong YANG, Jonathan M. WARD, Síle NIC CHORMAIC2018 Volume 46 Issue 2 Pages 92-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSOptical frequency combs are widely used for metrology, optical clocks, optical communications and sensors. In whispering gallery mode (WGM) microcavity resonators, geometrical features enable the four-wave mixing phase match condition to be satisfied. Hence, frequency comb generation is achievable. Geometrical dispersion of hollow structure WGM cavities can broaden the comb span to the visible range.View full abstractDownload PDF (1477K)
Laser Original
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Shun FUJII, Ryo SUZUKI, Atsuhiro HORI, Akihiro KUBOTA, Takasumi T ...2018 Volume 46 Issue 2 Pages 97-
Published: 2018
Released on J-STAGE: December 17, 2020
JOURNAL OPEN ACCESSIn this study, numerical modeling and simulations of Kerr frequency comb and Kerr soliton in microcavities were performed with nonlinear coupled mode equation (NCME) and Lugiato-Lefever equation (LLE). We compared two methods and performed simulations of mode-locked Kerr comb in microcavities with anomalous and normal dispersionsView full abstractDownload PDF (1065K)
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