Silicon nitride-based Kerr frequency combs and applications in metrology

Sun, Zhaoyang; Li, Yang; Bai, Benfeng; Zhu, Zhendong; Sun, Hong‐Bo

doi:10.1117/1.ap.4.6.064001

Cited by 11 publications

(2 citation statements)

References 140 publications

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“…Here, multicolor solitons with frequency differences up to the terahertz range readily satisfy the self-imaging condition at a length comparable to the laser cavity. In this regard, the Talbot effect is not restricted to multicolor solitons, and it is also promising for exploring complex nonlinear dynamics in other ultrahigh repetition rate systems, such as microresonators (50)(51)(52)(53)(54) and four-wave mixing-induced mode-locked lasers (55)(56)(57). For a microresonator with a longitudinal mode spacing of 200 GHz and a dispersion value of −202 ps 2 /km, the integer self-imaging distance is ~20 m. Considering the cavity length of ~1 mm, the temporal Talbot effect may be responsible for breathers with thousands of periods (58).…”

Section: Discussionmentioning

confidence: 99%

The dissipative Talbot soliton fiber laser

Zhang,

Du,

Zeng

et al. 2024

Sci. Adv.

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Talbot effect, characterized by the replication of a periodic optical field in a specific plane, is governed by diffraction and dispersion in the spatial and temporal domains, respectively. In mode-locked lasers, Talbot effect is rarely linked with soliton dynamics since the longitudinal mode spacing and cavity dispersion are far away from the self-imaging condition. We report switchable breathing and stable dissipative Talbot solitons in a multicolor mode-locked fiber laser by manipulating the frequency difference of neighboring spectra. The temporal Talbot effect dominates the laser emission state—in the breathing state when the integer self-imaging distance deviates from the cavity length and in the steady state when it equals the cavity length. A refined Talbot theory including dispersion and nonlinearity is proposed to accurately depict this evolution behavior. These findings pave an effective way to control the operation in dissipative optical systems and open branches in the study of nonlinear physics.

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Section: Discussionmentioning

confidence: 99%

The dissipative Talbot soliton fiber laser

Zhang,

Du,

Zeng

et al. 2024

Sci. Adv.

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“…In recent years, the need for integrated dissipative Kerr soliton (DKS) combs makes low-noise, integrated, high frequency band microwave oscillators possible. The DKS naturally produces several GHz-THz comb spectra via four-wave mixing in the optical resonator. − Also, integrated DKSs have seen rapid development thanks to microfabrication advancements. , To reduce the phase noise of the DKS oscillator, the OFD principle has been introduced, in which the stability of the oscillator is derived from a stabilized laser. Meanwhile, it is essential to detect and remove the carrier envelope offset frequency ( f ceo ), thus the octave-spanning comb spectra are indispensable in the work.…”

Section: Introductionmentioning

confidence: 99%

Ultralow-Noise K-Band Soliton Microwave Oscillator Using Optical Frequency Division

Niu,

Hua,

Shen

et al. 2024

ACS Photonics

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Compact, low-noise microwave oscillators are required throughout a wide range of applications such as radar systems, wireless networks, and frequency metrology. Optical frequency division via an optical frequency comb provides a powerful tool for low-noise microwave signal generation. Here, we experimentally demonstrate an optical reference down to 26 GHz frequency division based on the dissipative Kerr soliton comb, which is generated on a CMOS-compatible, high-index doped silica glass platform. The optical reference is generated through two continuous wave lasers locked to an ultralow expansion cavity. The dissipative Kerr soliton comb with a repetition rate of 26 GHz acts as a frequency divider to derive an ultralow-noise microwave oscillator, with a phase noise level of −101.3 dBc/Hz at a 100 Hz offset frequency and −132.4 dBc/Hz at a 10 kHz offset frequency. Furthermore, the Allan deviation of the oscillator reaches 6.4 × 10 −13 at a 1 s measurement time. Our system is expected to provide an ultralow-noise microwave oscillator for future radar systems and the next generation of wireless networks.

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Integrated Electro‐Optic Frequency Combs: Theory and Current Progress

Zhang,

Yin,

Zhang

et al. 2024

Laser & Photonics Reviews

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Optical frequency combs (OFCs) have evolved into one of the most active areas of photonics, underpinning advancements in both fundamental science and commercial contexts. Electro‐optic modulation for OFC generation offers excellent versatility, stability, and phase coherence. With the rapid progress in micro‐nano fabrication techniques, electro‐optic frequency combs (EOFCs) have been realized on many integrated platforms, including silicon on insulator (SOI), indium phosphide (InP), and lithium niobate on insulator (LNOI). These compact, low‐cost, and energy‐efficient EOFCs support a wide range of applications. In this study, we review the theory for the generation of integrated EOFCs, summarize the demonstrations on the main integrated platforms, present applications, and envision the development directions of integrated EOFCs in view of materials, devices, and applications.

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Silicon nitride-based Kerr frequency combs and applications in metrology

Cited by 11 publications

References 140 publications

The dissipative Talbot soliton fiber laser

The dissipative Talbot soliton fiber laser

Ultralow-Noise K-Band Soliton Microwave Oscillator Using Optical Frequency Division

Integrated Electro‐Optic Frequency Combs: Theory and Current Progress

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