164 citations · 692 across the 8 of their papers we have counts for
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Tunable low-phase-noise terahertz synthesis using a fiber-interferometer-referenced optical frequency comb and an EDFA-integrated Vernier cavity
Masayuki Higaki, Yoshiaki Nakajima, Yu Tokizane +4
demonstrate a frequency-tunable, low-phase-noise terahertz (THz) synthesizer based on a fiber-interferometer-referenced optical frequency comb (OFC), an erbium-doped fiber amplifie…
Characterization of timing jitter spectra in free-running mode-locked lasers with 340 dB dynamic range over 10 decades of Fourier frequency
Kwangyun Jung, Jungwon Kim
We demonstrate a method that enables accurate timing jitter spectral density characterization of free-running mode-locked laser oscillators over more than 10-decade of Fourier freq…
Sub-20-Attosecond Timing Jitter Mode-Locked Fiber Lasers
Hyoji Kim, Peng Qin, Youjian Song +6
We demonstrate 14.3-attosecond timing jitter [integrated from 10 kHz to 94 MHz offset frequency] optical pulse trains from 188-MHz repetition-rate mode-locked Yb-fiber lasers. In o…
Frequency comb-based microwave transfer over fiber with instability using fiber-loop optical-microwave phase detectors
Kwangyun Jung, Junho Shin, Jinho Kang +3
We demonstrate a remote microwave/radio-frequency (RF) transfer technique based on the stabilization of a fiber link using a fiber-loop optical-microwave phase detector (FLOM-PD).…
Ultralow Phase Noise Microwave Generation From Mode-Locked Er-Fiber Lasers With Subfemtosecond Integrated Timing Jitter
Kwangyun Jung, Junho Shin, Jungwon Kim
We demonstrate ultralow phase noise 10-GHz microwave signal generation from a free-running mode-locked Er-fiber laser with -142 and -157 dBc/Hz single-sideband absolute phase noise…
Sub-femtosecond synchronization of microwave oscillators with mode-locked Er-fiber lasers
Kwangyun Jung, Jungwon Kim
We synchronize a 8.06-GHz microwave signal from a voltage-controlled oscillator with an optical pulse train from a 77.5- MHz mode-locked Er-fiber laser using a fiber-based optical-…
Sub-100-as timing jitter optical pulse trains from mode-locked Er-fiber lasers
Tae Keun Kim, Youjian Song, Kwangyun Jung +4
We demonstrate sub-100-attosecond timing jitter optical pulse trains generated from free-running, 77.6-MHz repetition-rate, mode-locked Er-fiber lasers. At -0.002(\pm0.001) ps2 net…
Timing jitter optimization of mode-locked Yb-fiber lasers toward the attosecond regime
Youjian Song, Chur Kim, Kwangyun Jung +2
We demonstrate ultra-low timing jitter optical pulse trains from free- running, 80 MHz repetition rate, mode-locked Yb-fiber lasers. Timing jitter of various mode-locking condition…
Impact of pulse dynamics on timing jitter in mode-locked fiber lasers
Youjian Song, Kwangyun Jung, Jungwon Kim
We investigate the high-frequency timing jitter spectral density of mode-locked fiber lasers in different mode-locked regimes. Quantum noise-limited timing jitter spectra of mode-l…