Study of microcomb threshold power with coupling scaling

Wang, Pei-Hsun; Chiang, Kuan-Lin; Yang, Zong-Ren

doi:10.1038/s41598-021-89411-0

Cited by 7 publications

(4 citation statements)

References 35 publications

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“…We also note that as predicted by the theory, the lowest pump-power pattern we could generate was a primary comb, which is the spectral signature of Turing rolls. From a general perspective, understanding threshold power scales with coupling, detuning or dispersion can be performed through a detailed analysis of the LLE [16], [17].…”

Section: Methodsmentioning

confidence: 99%

Platform-Independent Optimization of Pump Power Threshold for Microcomb Generation

2022

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Kerr optical frequency combs have found various applications in science and technology, and minimizing their pump power has become an important area of research. These combs are generated using a wide variety of platforms, with a size ranging from micrometers to millimeters, and quality factors ranging from millions to billions. It is therefore not trivial to assess the pump power requirements for comb generation when they have such a large diversity in terms of resonator properties and pump configurations. We propose a suitably normalized threshold pump power as a metric to optimize Kerr comb generation independently of the platform. This method allows one to evaluate the minimum threshold power solely based on the properties of the bare resonator, and independently of dispersion, detuning or coupling considerations. In order to confirm the validity of this approach, we experimentally demonstrate Kerr comb generation in a millimeter-size magnesium fluoride whispering-gallery mode resonator with a threshold pump power of only 1.2 mW, which is one of the lowest pump powers reported to date for a mm-size resonator.

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Section: Methodsmentioning

confidence: 99%

Platform-Independent Optimization of Pump Power Threshold for Microcomb Generation

2022

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“…Over-coupled state in the microring benefits soliton generation via efficient pump power injection and comb power extraction under the large detuning and Kerr-induced phase shift. [50] As dispersion is a critical factor for further soliton generation, we experimentally characterize the dispersion of the ytterbiumdoped LN microring. The cavity resonance frequency 𝜔 μ is expanded by a Taylor series around a reference resonance 𝜔 0 ,…”

Section: Device Fabrication and Characterizationmentioning

confidence: 99%

“…Over‐coupled state in the microring benefits soliton generation via efficient pump power injection and comb power extraction under the large detuning and Kerr‐induced phase shift. [ 50 ]…”

Section: Device Design Fabrication and Characterizationmentioning

confidence: 99%

1550‐nm Band Soliton Microcombs in Ytterbium‐Doped Lithium‐Niobate Microrings

Yang,

et al. 2023

Laser & Photonics Reviews

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Micro‐optical frequency combs are miniaturized coherent light sources exhibiting a tremendous influence on precision spectroscopy, optical clocks, and high‐speed optical communications. The rare‐earth‐doped lithium niobate (LN) is a promising platform to integrate the lasers and comb sources on the same chip of single material. However, microcombs generated in rare‐earth‐doped LN thin film (LNTF) have not yet been fully explored. To explore the protocols of generating optical combs in ytterbium‐doped LNTF, the comb‐like laser is studied in the 1060 nm band, and the dissipative Kerr soliton is experimentally demonstrated in the telecom band in a Z‐cut wafer. The over‐coupled fundamental transverse electric mode with anomalous dispersion is excited at an on‐chip pump power of 75.7 mW to generate the robust bright soliton. The broadband spectrum of the Kerr soliton ranges from 1480 to 1660 nm with 110 comb lines, whose repetition rate is 197.8 GHz. The mode‐locking of the soliton can be achieved as a result of the photorefractive effect of ytterbium‐doped LNTF instead of complex feedback schemes. Numerical simulations are highly accordant with the experimental results. This work expands the microcomb‐generating platform and increases the potential for integrated on‐chip applications including precision ranging and frequency division.

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“…Up to now, chaotic microcombs have been extensively applied in random numbers generation [8], massive parallel lidar [9][10][11] and other fields [12,13]. By using a demultiplexer to filter out chaotic microcombs in parallel, parallel chaos signals can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Generation of parallel pulsed chaos based on Si3N4 microresonator and its application in imaging

Xiong,

Hu,

Bai

et al. 2023

Advanced Sensor Systems and Applications XIII

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In this work, a new scheme based on a Si3N4 microresonator for generating parallel pulsed chaos is proposed, and the performances of the parallel pulsed chaos and its application in imaging are experimentally investigated. Under optical injection with suitable injection parameters, the Si3N4 microresonator can output a continuous wave (CW) chaotic microcomb including nearly 100 comb lines. After passing through an acousto-optic modulator, the CW chaotic microcomb can be transferred into pulsed chaotic microcomb, in which each comb line provides a pulsed chaos. Therefore, parallel pulsed chaos signal can be generated. Taken the parallel pulsed chaos signal as the emitting resource of lidar, the quality of imaging has been analyzed. The experimental results show that clear target imaging can be achieved.

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Study of microcomb threshold power with coupling scaling

Cited by 7 publications

References 35 publications

Platform-Independent Optimization of Pump Power Threshold for Microcomb Generation

Platform-Independent Optimization of Pump Power Threshold for Microcomb Generation

1550‐nm Band Soliton Microcombs in Ytterbium‐Doped Lithium‐Niobate Microrings

Generation of parallel pulsed chaos based on Si3N4 microresonator and its application in imaging

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