Non-resonant recirculating light phase modulator

Huang, Haijin; Han, Xu; Balčytis, Armandas; Dubey, Aditya; Boes, Andreas; Nguyen, Thach G.; Ren, Guanghui; Tan, Mengxi; Tian, Yonghui; Mitchell, Arnan

doi:10.1063/5.0103558

Cited by 15 publications

(7 citation statements)

References 24 publications

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“…This integrated realization represents a three order of magnitude decrease in optical path length compared to typical 13.5 m optical ber loop setups [14], albeit at the cost of a corresponding increase in the relevant process rates from megahertz to gigahertz scale. Sub-1 dBcm − 1 propagation loss waveguides are fabricated by using a strip-loading approach, in which mode con nement is established by a 1 µm wide ridge patterned in a 300 nm thick silicon nitride lm covering the likewise 300 nm thickness LiNbO 3 layer [24,25], resulting in a stack sketched in Fig. 1b.…”

Section: Resultsmentioning

confidence: 99%

Reconfigurable synthetic dimension frequency lattices in an integrated lithium niobate ring cavity

Balcytis,

Dinh,

Ozawa

et al. 2024

Preprint

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Harnessing non-spatial properties of photons as if they represent an additional independent coordinate underpins the emerging synthetic dimension approach. It enables probing of higher-dimensional physical models within low-dimensional devices, such as on a planar chip. We demonstrate an integrated thin-film lithium niobate ring resonator that, under dynamic modulation, simulates a tight-binding model with its discrete frequency modes representing lattice sites. Inter-mode coupling, and the simulated lattice geometry, can be reconfigured by controlling the modulating signals. Up to a quasi-3D lattice connectivity with controllable gauge potentials has been achieved by simultaneous synchronized nearest-, second- and third-nearest-neighbor coupling, and verified by acquiring time-resolved synthetic band structures. Development of synthetic frequency dimension devices in the thin-film lithium niobate photonic integration platform is a key step in increasing the complexity of topological models achievable on a chip, combining efficient electro-optic mode coupling response with non-linear effects for long-range mode interactions.

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Section: Resultsmentioning

confidence: 99%

Reconfigurable synthetic dimension frequency lattices in an integrated lithium niobate ring cavity

Balcytis,

Dinh,

Ozawa

et al. 2024

Preprint

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“…In this work, we select and k=2, resulting in to minimize the requirement on the RF driving power 18 .…”

Section: δTmentioning

confidence: 99%

Spatio-temporal isolator in lithium niobate on insulator

Huang¹,

Balčytis²,

Dubey³

et al. 2023

OES

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In this contribution, we simulate, design, and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on an insulator waveguide platform. We used two cascaded travelling wave phase modulators for spatiotemporal modulation and a racetrack resonator as a wavelength filter to suppress the sidebands of the reverse propagating light. This enabled us to achieve an isolation of 27 dB. The demonstrated suppression of the reverse propagating light makes such isolators suitable for the integration with III-V laser diodes and Erbium doped gain sections in the thin-film lithium niobate on the insulator waveguide platform.

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“…[ 33 ] Moreover, there is another kind of non‐resonant recirculating E‐O combs generator, enabling the modulation of an optical wave at any wavelength. [ 34 ] To ensure that a certain part of the optical signal is always modulated by the same amplitude of the modulation signal, the optical path in‐between two adjacent modulation areas has to be an integer times of the wavelength of the modulation signal, limiting the modulation frequency to a series of discrete frequencies. Hence, the repetition rate of the generated E‐O comb is also limited to a series of discrete frequencies.…”

Section: Theory Of E‐o Combsmentioning

confidence: 99%

Electro‐Optic Frequency Combs: Theory, Characteristics, and Applications

Zhuang

et al. 2023

Laser & Photonics Reviews

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Optical frequency combs (OFCs) are a unique kind of light source, which are represented as a series of equally spaced coherent spectral lines in the frequency domain. OFCs can mainly be divided into mode-locked lasers, Kerr frequency combs, and electro-optic frequency combs (E-O combs), which have broad applications in optical communications, frequency metrology, atomic clocks, distance ranging, spectroscopy, and arbitrary waveform generation. Among them, E-O combs feature some unique advantages, such as fast tunable repetition rate, high sidebands power, and reconfigurability of the comb spectrum. Especially in recent years, with the development of micro-nano processing technology, on-chip E-O combs have become a dynamic research topic with many fundamental scientific problems as well as engineering applications for further exploration. To summarize the past development and envision the prosperous future of E-O combs, the area of E-O combs is reviewed from the following aspects: development of E-O combs; theory including the generation process of E-O combs and the electro-optic modulation models; important techniques including flattening, broadening, noise, and stability controlling; applications including communications, ranging, spectroscopy, wavelength calibration of astronomical spectrographs, and microwave generation; and pros and cons when compared with other OFCs.

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Non-resonant recirculating light phase modulator

Cited by 15 publications

References 24 publications

Reconfigurable synthetic dimension frequency lattices in an integrated lithium niobate ring cavity

Reconfigurable synthetic dimension frequency lattices in an integrated lithium niobate ring cavity

Spatio-temporal isolator in lithium niobate on insulator

Electro‐Optic Frequency Combs: Theory, Characteristics, and Applications

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