Digitally tunable optical delay line based on thin-film lithium niobate featuring high switching speed and low optical loss

Ke, Wei; Lin, Yuechuan; He, Mingbo; Xu, Mengyue; Zhang, Jiaxiang; Lin, Zhongjin; Yu, Siyuan; Cai, Xinlun

doi:10.1364/prj.471534

Cited by 26 publications

(2 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The potential for developing LiNbO 3 thin films is of particular interest for integrated and miniaturized devices such as optical filters, optical waveguides or modulators, and reduced control voltage [ 6 , 11 , 12 ]. In fact, epitaxial thin films of LN have found applications in various devices so far, including optical switches [ 13 ], photonic crystals [ 14 ], solid-state batteries [ 15 ], surface acoustic wave (SAW) and bulk acoustic wave (BAW) devices [ 16 , 17 , 18 ], and quantum memories [ 19 ]. In addition, it has been reported that incorporating LiNbO 3 layers into lithium ion battery (LIB) systems might enhance their stability, mitigate unwanted reactions, and facilitate the transfer of lithium across surfaces [ 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

LiNbO3 Thin Films through a Sol–Gel/Spin-Coating Approach Using a Novel Heterobimetallic Lithium–Niobium Precursor

Lo Presti,

Pellegrino,

Micard

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

Lithium niobate is a lead-free material which has attracted considerable attention due to its excellent optical, piezoelectric, and ferroelectric properties. This research is devoted to the synthesis through an innovative sol–gel/spin-coating approach of polycrystalline LiNbO3 films on Si substrates. A novel single-source hetero-bimetallic precursor containing lithium and niobium was synthesized and applied to the sol–gel synthesis. The structural, compositional, and thermal characteristics of the precursor have been tested through attenuated total reflection, X-ray photoelectron spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The LiNbO3 films have been characterized from a structural point of view with combined X-ray diffraction and Raman spectroscopy. Field-emission scanning electron microscopy, energy dispersive X-ray analysis, and X-ray photoelectron spectroscopy have been used to study the morphological and compositional properties of the deposited films.

show abstract

Section: Introductionmentioning

confidence: 99%

LiNbO3 Thin Films through a Sol–Gel/Spin-Coating Approach Using a Novel Heterobimetallic Lithium–Niobium Precursor

Lo Presti,

Pellegrino,

Micard

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Recently, several tunable ODLs based on TFLN on insulator [24][25][26] were demonstrated using the EO effects. Most of demonstrated tunable ODLs consist of several Mach-Zehnder interferometer (MZI) optical switches which connect the segmented delay-line waveguides.…”

mentioning

confidence: 99%

Electro-optically tunable optical delay line with a continuous tuning range of ∼220 fs in thin-film lithium niobate

Song

Chen

et al. 2023

Opt. Lett.

View full text Add to dashboard Cite

We demonstrate fabrication of a 30-cm-long thin-film lithium niobate (TFLN) optical delay line (ODL) incorporated with segmented microelectrodes of 24-cm total length using femtosecond laser lithography technique. The transmission spectra of the unbalanced Mach-Zehnder interferometers (MZIs) reveal an ultra-low propagation loss of 0.025 dB/cm. The device exhibits a low half-wave voltage of 0.45 V, corresponding to a voltage-length product of 5.4 V• cm in the push-pull configuration. We also demonstrate a high electrooptic (EO) tuning efficiency of 3.18 fs/V in the fabricated ODL.

show abstract

Ultra‐Fast, Fine‐Resolution Thin‐Film Lithium Niobate Spectrometer

Liang,

Lin,

Wang

et al. 2024

Laser & Photonics Reviews

View full text Add to dashboard Cite

Achieving rapid spectroscopic characterization is highly desirable for contactless, real‐time monitoring applications. However, it is challenging due to the trade‐off between short acquisition time and fine resolution. To address this challenge, a fully active scanning Fourier transform spectrometer (FTS) using thin‐film lithium niobate (TFLN) photonics is proposed. This work theoretically reveals relations between acquisition time and resolution and finds that their trade‐off can be notably alleviated by employing Michelson interferometer architectures. The proposed device consists of two broadband edge couplers and a tunable Michelson interferometer which includes 1.02 m‐length equivalent waveguides. The fabricated waveguides can achieve a wafer‐scale optical propagation loss of 12 2.4 dB , which enables the device to maintain a low insertion loss with a 1.02 m‐length equivalent waveguide. The proposed device can achieve an acquisition time of 10 , a spectral resolution of 0.74 (i.e., 0.19 nm), and an operation wavelength range from 1260 to 1600 nm.

show abstract

Digitally tunable optical delay line based on thin-film lithium niobate featuring high switching speed and low optical loss

Cited by 26 publications

References 33 publications

LiNbO3 Thin Films through a Sol–Gel/Spin-Coating Approach Using a Novel Heterobimetallic Lithium–Niobium Precursor

LiNbO3 Thin Films through a Sol–Gel/Spin-Coating Approach Using a Novel Heterobimetallic Lithium–Niobium Precursor

Electro-optically tunable optical delay line with a continuous tuning range of ∼220 fs in thin-film lithium niobate

Ultra‐Fast, Fine‐Resolution Thin‐Film Lithium Niobate Spectrometer

Contact Info

Product

Resources

About