Low phase noise THz generation from a fiber-referenced Kerr microresonator soliton comb

Abstract

THz oscillators generated via frequency-multiplication of microwaves are facing difficulty in achieving low phase noise. Photonics-based techniques, in which optical two tones are translated to a THz wave through opto-electronic conversion, are promising if the relative phase noise between the two tones is well suppressed. Here, a THz ($\approx$ 560 GHz) wave with a low phase noise is provided by a frequency-stabilized, dissipative Kerr microresonator soliton comb. The repetition frequency of the comb is stabilized to a long fiber in a two-wavelength delayed self-heterodyne interferometer, significantly reducing the phase noise of the THz wave. A measurement technique to characterize the phase noise of the THz wave beyond the limit of a frequency-multiplied microwave is also demonstrated, showing the superior phase noise of the THz wave to any other photonic THz oscillators (> 300 GHz).

References in corpus (19)

• Temporal solitons in optical microresonators
• What should 6G be?
• Generation of Ultrastable Microwaves via Optical Frequency Division
• Massively parallel coherent laser ranging using soliton microcombs
• 1.5 $\mu$m lasers with sub 10 mHz linewidth
• Hertz-linewidth semiconductor lasers using CMOS-ready ultra-high-$Q$ microresonators
• Photonic microwave signals with zeptosecond level absolute timing noise
• Adaptive dynamic range shift (ADRIFT) quantitative phase imaging
• 422 Million Q Planar Integrated All-Waveguide Resonator with a 3.4 Billion Absorption Limited Q and Sub-MHz Linewidth
• Single-mode dispersive waves and soliton microcomb dynamics
• 300 GHz wave with attosecond-level timing noise
• Ultra low frequency noise laser by locking to an optical fiber delay line
• Coherent Optical Clock Down-Conversion for Microwave Frequencies with 10-18 Instability
• Terahertz wave generation using a soliton microcomb
• Observation of Fundamental Thermal Noise in Optical Fibers down to Infrasonic Frequencies
• Thermal control of Kerr microresonator soliton comb via an optical sideband
• Harnessing Dispersion in Soliton Microcombs to Mitigate Thermal Noise
• Thermal noise reduction in soliton microcombs via laser self-cooling
• Amplification and phase noise transfer of a Kerr microresonator soliton comb for low phase noise THz generation with a high signal-to-noise ratio

Cited by in corpus (7)

• Palm-sized, vibration-insensitive and vacuum-free all-fiber-photonic module for 10-14-level stabilization of CW lasers and frequency combs
• Terahertz wireless communication at 560-GHz band using Kerr micro-resonator soliton comb
• Carrier conversion from terahertz wave to dual-wavelength near-infrared light injection-locking to optical comb using asynchronous nonpolarimetric electro-optic downconversion with electro-optic polymer modulator
• Stepped-Frequency THz-wave Signal Generation From a Kerr Microresonator Soliton Comb
• Direct fiber-coupled soliton microcomb system with enhanced stability and reproducibility via high numerical-aperture polarization-maintaining single-mode fibers and temperature control
• Self-cooling, blue-detuned dissipative Kerr microresonator soliton comb
• All-photonic W-band terahertz receiver based on THz-to-optical carrier conversion with soliton microcomb dual carriers for high-speed OOK wireless transmission