Raman-assisted optical frequency combs generated in a silica microsphere in two whispering gallery mode families

Андрианов, А. В.; Anashkina, Elena A.

doi:10.1088/1612-202x/abd8da

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…The output spectra were measured with the Optical Spectrum Analyzer 'OSA(II)' which also operates up to 1700 nm. To obtain OFC generation, the regime of sweeping the CW laser frequency near a certain value was tuned on as in our previous works [31,37,46]. After a few sweeping periods, this regime was turned off (after that, the laser frequency was constant) and steady-state OFCs were generated due to thermal frequency pulling.…”

Section: The 2nd Experimental Seriesmentioning

confidence: 99%

“…After a few sweeping periods, this regime was turned off (after that, the laser frequency was constant) and steady-state OFCs were generated due to thermal frequency pulling. Note that a similar scheme was previously used to generate Raman-assisted nested OFCs with soliton-like spectra belonging to two different mode families [31].…”

Section: The 2nd Experimental Seriesmentioning

confidence: 99%

“…Since then, Raman processes have been widely investigated. Many works were also devoted to study of Kerr-Raman OFCs (for example, [22,[29][30][31]). However, the nonlinear dynamics of intracavity radiation can be so complex and diverse that it is still possible to discover new features or interesting regimes of nonlinear conversion of radiation.…”

Section: Introductionmentioning

confidence: 99%

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Optical Frequency Combs Generated in Silica Microspheres in the Telecommunication C-, U-, and E-Bands

et al. 2021

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Optical frequency combs (OFCs) generated in microresonators with whispering gallery modes are demanded for different applications including telecommunications. Extending operating spectral ranges is an important problem for wavelength-division multiplexing systems based on microresonators. We demonstrate experimentally three spectrally separated OFCs in the C-, U-, and E-bands in silica microspheres which, in principle, can be used for telecommunication applications. For qualitative explanation of the OFC generation in the sidebands, we calculated gain coefficients and gain bandwidths for degenerate four-wave mixing (FWM) processes. We also attained a regime when the pump frequency was in the normal dispersion range and only two OFCs were generated. The first OFC was near the pump frequency and the second Raman-assisted OFC with a soliton-like spectrum was in the U-band. Numerical simulation based on the Lugiato–Lefever equation was performed to support this result and demonstrate that the Raman-assisted OFC may be a soliton.

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Section: The 2nd Experimental Seriesmentioning

confidence: 99%

Section: The 2nd Experimental Seriesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optical Frequency Combs Generated in Silica Microspheres in the Telecommunication C-, U-, and E-Bands

et al. 2021

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“…Both solitons (main and Raman ones) were located in the anomalous dispersion region [ 7 ]. Raman solitons in two mode families in the anomalous dispersion region driven by a pump in the normal dispersion region were experimentally observed in a silica microsphere [ 19 ]. A Raman soliton in a silica microrod driven by a CW pump was studied in [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Optical Control of Raman Solitons in a Functionalized Silica Microsphere

2022

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The investigation of optical microcavity solitons is in demand both for applications and basic science. Despite the tremendous progress in the study of microresonator solitons, there is still no complete understanding of all features of their nonlinear dynamics in various regimes. Controlling soliton properties is also of great interest. We proposed and investigated experimentally and theoretically a simple and easily reproducible way to generate Raman solitons with controllable spectral width in an anomalous dispersion region in a functionalized silica microsphere with whispering gallery modes (WGMs) driven in a normal dispersion regime. To functionalize the microsphere, coating (TiO2 + graphite powder) was applied at the pole. The coating is used for effective thermalization of the radiation of an auxiliary laser diode launched through the fiber stem holding the microsphere to control detuning of the pump frequency from exact resonance due to the thermo-optical shift of the WGM frequencies. We demonstrated that the thermo-optical control by changing the power of an auxiliary diode makes it possible to switch on/off the generation of Raman solitons and control their spectral width, as well as to switch Raman generation to multimode or single-mode. We also performed a detailed theoretical analysis based on the Raman-modified Lugiato–Lefever equation and explained peculiarities of intracavity nonlinear dynamics of Raman solitons. All experimental and numerically simulated results are in excellent agreement.

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“…[ 96 ] Versatile frequency detuning regimes for different Kerr comb behaviors have been experimentally and theoretically investigated through wavelength scanning involving thermal effects. [ 18–20,23,97–105 ] In particular, step‐like transitions are found to be associated with solitons and soliton crystals in Kerr microcavities. [ 18–20,23,106–108 ] For a fixed‐frequency pump laser, the detuning scanning to access soliton regimes can be realized by externally tuning the cavity temperature thus the relative wavelength detuning between the fixed‐wavelength laser and the resonance position.…”

Section: Introductionmentioning

confidence: 99%

Kerr Frequency Comb Interaction with Raman, Brillouin, and Second Order Nonlinear Effects

Lin

Song

2021

Laser & Photonics Reviews

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Kerr optical frequency comb as a novel microcomb source has found a variety of key applications from fundamental research to engineering applications. Generation of such microcombs require resonator platforms with small mode volumes and high quality factors, where the interaction of light and matter is resonantly enhanced. In these platforms, other nonlinear photonic effects can be simultaneously excited and interact with Kerr frequency combs. In this review, the focus is on recent progresses on the microcomb development involving its interaction with Raman, Brillouin scattering, and second‐order nonlinear processes such as second harmonic generation (SHG). The resulting transfer of Kerr frequency combs into other spectral windows as referred to Kerr–Raman, Kerr–Brillouin, Kerr–SHG combs is introduced. Additionally, other emerging novel microcombs in microresonators with second‐order nonlinearity including electro‐optical modulation microcombs and quadratic microcombs are reviewed. Challenges and opportunities brought along are also discussed.

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Raman-assisted optical frequency combs generated in a silica microsphere in two whispering gallery mode families

Cited by 7 publications

References 32 publications

Optical Frequency Combs Generated in Silica Microspheres in the Telecommunication C-, U-, and E-Bands

Optical Frequency Combs Generated in Silica Microspheres in the Telecommunication C-, U-, and E-Bands

Thermo-Optical Control of Raman Solitons in a Functionalized Silica Microsphere

Kerr Frequency Comb Interaction with Raman, Brillouin, and Second Order Nonlinear Effects

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