Optical sensors based on Fiber Bragg Gratings (FBGs) are used in several applications and industries. In order for fiber optic sensors to compete with electrical sensors, several critical parameters of both the sensors and sensor interrogators need to be in place such as performance, cost, size, reliability relevant to the target application. Here we have developed a tunable laser based optical...

We consider multi-input multi-output (MIMO) communications over multimode fibers (MMFs). Current MMF standards, such as OM3 and OM4, use fibers with core radii of 50μm, allowing hundreds of modes to propagate. Unfortunately, due to physical and computational complexity limitations, we cannot couple and detect hundreds of data streams. In order to circumvent this issue, two solutions were presen...

A low voltage, wide bandwidth compact electro-optic modulator is a key building block in the realization of tomorrow’s communication and networking needs. Recent advances fabrication application thin-film lithium niobate, its integration with photonic integrated circuits based silicon make it an ideal platform for such device. In this work, high-extinction dual-output folded Mach Zehnder nitrid...

The design of input power couplers represents one of the most important challenges of accelerators that use super-conducting RF technology. These devices must fulfil several functions while being subject to mechanical, electromagnetic, vacuum and cryogenic constraints. The rapidly increasing number of projects, planned or under construction, which propose to use super-conducting cavities has pr...

Hybrid-material optical fibers enhance the capabilities of fiber-optics technologies, extending current functionalities to several emerging application areas. Such platforms rely on integration novel materials into fiber core or cladding, thereby supporting hybrid modes with new characteristics. Here we present experiments that reveal mode interactions within a doped-core silica containing cent...

We implemented all-fiber delay line using linearly chirped fiber Bragg gratings (CFBG), which can be applicable for reflectometry or optical coherence tomography (OCT). Compared with the previously reported delay lines, the proposed fiber-based optical delay line has in principle novel advantages such as automatic dispersion cancellations without additional treatment and a gain in optical delay...

Waveguide gratings are used for applications such as guided-mode resonance filters and fiber-to-chip couplers. A waveguide grating typically consists of a stack single-mode slab grating. The filling factor the with respect to mode intensity profile can be altered via changing waveguide’s refractive index. As result, propagation length is slightly sensitive index changes. Here, we theoretically ...

Sub-micronic grating couplers have been integrated on optical waveguides for efficient light in-coupling into interferometric biosensors. Design and fabrication processes are presented as well as the results of the optical characterization and the sensing evaluation. Keywords-Grating couplers; interferometers; biosensors; integrated optics.

Optical coupling between preferential-order volume diffraction grating couplers fabricated on independent substrates is demonstrated. The coupling efficiency between gratings is quantified as a function of both grating and waveguide fabrication technology and relative angular position of the two substrates. A maximum grating-to-grating coupling efficiency of 31% is reported for coupling between...