Add-Drop Filter Based on Wavelength-Dependent Light Interlink between Lithium-Niobate Microwaveguide Chip and Microfiber Knot Ring

Abstract

Abstract:In this paper, we experimentally demonstrate an add-drop filter based on wavelengthdependent light coupling between a lithium-niobate (LN) microwaveguide chip and a microfiber knot ring (MKR). The MKR was fabricated from a standard single-mode fiber, and the LN microwaveguide chip works as a robust substrate to support the MKR. The guided light can be transmitted through add and drop functionality and the behaviors of the add-drop filter can be clearly observed. Furthermore, its performance dependence on the MKR diameter is also studied experimentally. The approach, using a LN microwaveguide chip as a platform to couple and integrate the MKR, may enable us to realize an optical interlink between the microstructured chip and the micro/nano fiber-optic device.

All-Optical Tuning of Light in WSe2-Coated Microfiber

“…All-optical modulation has been realized with graphene-decorated microfiber (MF) [7], graphene-covered MF [8], and stereo graphene-MF structures [9]. Tuning of MF devices has been achieved when the MF is connected to different materials, such as liquid crystal [10], lithium niobate [11], and polymer [12]. All-optical tunable microfiber knot resonator (MKR) with its top and bottom covered by graphene has been realized [13].…”

A study of terahertz - photonic structures and nano-antennas based on eigen-analysis techniques formulated using finite element method

“…For this reason, tunable 𝑇 𝐻𝑧 and photonic structures are thoroughly analyzed. Explicitly, photonic structures consisted of lithium niobate (𝐿𝑖𝑁 𝑏𝑂 3 ), a commonly used linear electro-optical material, are employed, [27][28][29][30]. In this context, an innovative approach is established for the study of electronically reconfigurable topologies, as the altered dielectric permittivity of 𝐿𝑖𝑁 𝑏𝑂 3 is numerically determined as a piecewise constant distribution rather than a constant mean value.…”

“…devices [25,[27][28][29][30] through the application of an externally applied dc voltage. Furthermore, the huge technological progress of material science has contributed in the development of tunable electromagnetic structures including 𝐿𝑖𝑁 𝑏𝑂 3 on insulator platform, [94], migrating the knowledge of SOI technology.…”