Optothermal control of the Raman gain enhanced ringing in microresonators

Wang, T.; Wang, M.; Hu, Yun; Long, Gui‐Lu

doi:10.1209/0295-5075/124/14002

Cited by 10 publications

(4 citation statements)

References 34 publications

(34 reference statements)

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“…In whispering gallery mode microcavities, the two most commonly used approaches for changing or modulating the refractive index are the thermo-optic effect and the electro-optic (EO) effect (Pockels effect) [144,[163][164][165][166][167][168][169][170][171][172][173][174][175][176]; however, other mechanisms like pressure (or acoustics wave-induced compression) have been used to a lesser extent. [53,177,178] In most materials used in integrated optics, the thermo-optic effect is orders of magnitude slower in response than the electro-optic effect ( Fig.…”

Section: Refractive Index Modulationmentioning

confidence: 99%

Emerging material systems for integrated optical Kerr frequency combs

et al. 2020

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The experimental realization of a Kerr frequency comb represented the convergence of research in materials, physics, and engineering, and this symbiotic relationship continues to underpin efforts in comb innovation today. While the initial focus developing cavity-based frequency combs relied on existing microresonator architectures and classic optical materials, in recent years, this trend has been disrupted. This paper reviews the latest achievements in frequency comb generation using resonant cavities, placing them within the broader historical context of the field. After presenting well-established material systems and device designs, the emerging materials and device architectures are examined. Specifically, the unconventional material systems as well as atypical device designs that have enabled tailored dispersion profiles and improved comb performance are compared to the current state of art. The remaining challenges and future outlook for the field of cavity-based frequency combs is evaluated.

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Section: Refractive Index Modulationmentioning

confidence: 99%

Emerging material systems for integrated optical Kerr frequency combs

et al. 2020

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“…Among these applications, WGM resonators play a significant role in sensing of different physical quantities such as nanoparticles [2,35,36], pressure [37], acceleration [38], and rotation velocity [39][40][41][42]. The highly efficient coupling [43][44][45][46] of light from conventional components to optical modes is a crucial factor in the development of chip-based devices. Besides, the fabrication of WGM resonators is compatible with the traditional semiconductor material processing, which promises the integration of optical gyroscopes based on WGM resonators.…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of phase-matching and Sagnac effect in a millimeter-scale wedged resonator gyroscope

Mao,

Yang,

Long

et al. 2022

Preprint

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The highly efficient coupling of light from conventional optical components to optical mode volumes lies in the heart of chip-based micro-devices, which is determined by the phase-matching between propagation constants of fiber taper and the whispering-gallery-mode (WGM) of the resonator. Optical gyroscopes, typically realized as fiber-optic gyroscopes and ring-laser gyroscopes, have been the mainstay in diverse applications such as positioning and inertial sensing. Here, the phase-matching is theoretically analyzed and experimentally verified. We observe Sagnac effect in a millimeter-scale wedged resonator gyroscope which has attracted considerable attention and been rapidly promoted in recent years. We demonstrate a bidirectional pump and probe scheme, which directly measures the frequency beat caused by the Sagnac effect. We establish the linear response between the detected beat frequency and the rotation velocity. The clockwise and counterclockwise rotation can also be distinguished according to the value of the frequency beat. The experimental results verify the feasibility of developing gyroscope in WGM resonator system and pave the way for future development.

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“…Microresonators [ 1–3 ] are key devices for modern photonics toward a large variety of applications, for example, lasers, [ 4–8 ] nonlinear optics, [ 9–14 ] cavity optomechanics, [ 15–19 ] sensing, [ 20–23 ] and quantum information processing. [ 24–28 ] Benefiting from the geometries of microcavities supporting “whispering gallery modes” (WGMs) the light field can be confined in extremely small volumes, reaching very high power density and very narrow spectral linewidth.…”

Section: Introductionmentioning

confidence: 99%

“…Microresonators [1][2][3] are key devices for modern photonics toward a large variety of applications, for example, lasers, [4][5][6][7][8] nonlinear optics, [9][10][11][12][13][14] cavity optomechanics, [15][16][17][18][19] sensing, [20][21][22][23] and quantum information processing. [24][25][26][27][28] Benefiting from the index contrast (Δn) of LN and cladding SiO 2 layer is as high as 0.6, which enables fabrication of low bending loss of microcavities (e.g., microrings or microdisks).…”

Section: Introductionmentioning

confidence: 99%

Microresonators in Lithium Niobate Thin Films

Xie

Chen

et al. 2021

Advanced Optical Materials

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geometries of microcavities supporting "whispering gallery modes" (WGMs) the light field can be confined in extremely small volumes, reaching very high power density and very narrow spectral linewidth. As a result, the ultrahigh in-cavity intensities significantly enhance the photon-tophoton interactions, leading to ultrahigh efficiencies of nonlinear optical process even at low-power optical excitation. In addition, the small scale enables the construction of resonator-based functional devices with very high integration. With combination of these intriguing features, low-power-consumption, low-cost on-chip devices can be developed successfully. The material platforms for microresonators are crucial for the practical applications. For example, silicon dioxide (SiO 2 ) is considered as one of the most commonly used materials for microresonators, and great success has been achieved based on this easy-to-fabricate platform. [29,30] Recently, with the well-developed technology for on-chip circuits fabrication, some semiconductor materials have been harnessed as the platforms of microresonators for more electro-optic potentials, such as silicon (Si), [31,32] SiC, [33][34][35][36] ZnO, [37,38] GaN, [39,40] or AlN [41,42] . Among them, lithium niobate (LiNbO 3 or LN) has risen into the forefront of microresonator demonstrations and drawn extensive interests in photonics and electronics.Lithium niobate is a multi-functional dielectric crystal that combines a number of excellent features, [43] such as electrooptic, nonlinear optical, acousto-optic, ferroelectric, piezoelectric, photorefractive, photo-luminescent properties, and receives a broad variety of applications in telecommunication, frequency conversion, optical storage, filtering, and quantum photonics. [44][45][46][47] The single-crystal thin film of LN is an ideal platform for microresonators owing to the unique combination of various excellent properties of the bulk. The major obstacle of the LN-based microcavities was the fabrication of high-quality LN thin films because the single-crystalline features cannot be well-preserved in thin-film LN produced by chemical methods of normal deposition that is applied for semiconductors. In addition, large-scale LN-thin film wafers are desired for further processing of on-chip devices. Recently, the so-called "lithium niobate on insulator" (LNOI) technology figures the major problem out and boosts the rapid development of the thin-film LN based devices. [48][49][50][51][52][53] Most used LN films are manufactured by smart " Ion cut" technique. The typical commercialized LN thin film based on ion cut consists of a single-crystalline LN thin film with thickness of 300-900 nm, a cladding layer of SiO 2 with thickness of 2-3 µm, and the supporting material (LN or Si bulk wafer). The fabrication process of ion-cut LN thin film can be referenced in details elsewhere. [54][55][56] The refractive Leveraging the outstanding nonlinear optical properties and the ultra-high spatial confinement of light, microresonators based on lith...

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Optothermal control of the Raman gain enhanced ringing in microresonators

Cited by 10 publications

References 34 publications

Emerging material systems for integrated optical Kerr frequency combs

Emerging material systems for integrated optical Kerr frequency combs

Experimental demonstration of phase-matching and Sagnac effect in a millimeter-scale wedged resonator gyroscope

Microresonators in Lithium Niobate Thin Films

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