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The development of advanced InP-based transmitter PICs of increasing complexity and integrating periodically capacitive-loaded (CL) Travelling Wave Electrode (TWE) Mach-Zehnder modulators is reported and discussed in examples.
We propose an ultra-compact solid-state auto-correlator fabricated by Si photonics technology. The correlation waveform is obtained by detecting the overlap of two slow-light pulses counter-propagating in a photonic crystal waveguide integrated with two-photon absorption photodiode array. Since the device does not need a mechanical delay scanner, the full integration on a silicon-on-insulator, easy...
Waveguide microring resonators sensors are numerously found in the Si-based technologies. Their operation, however, requires the operation of a tunable laser and the real-time monitoring of the location of their resonance peaks. An active material with gain could omit such operation through the detection of a laser-generated signal. Here, Al2O3 is presented as an alternative technology that has the...
Coupled photonic crystal microcavities have been considered when exploring platforms for quantum photonic effects like quantum-optical Josephson interferometers, single photon emitters and coupled-cavity single-photon emitters and many others. Arrays of photonic cavities are relevant structures for developing large-scale photonic integrated circuits, single mode coupled-cavity lasers and for investigating...
As optical switching and multiplexing architectures evolve, optical multicast keeps on being a capability advertised by a few core and transport optical equipment vendors. However, to the date, not much use of this service has been made by operators. This work addresses the reasons behind this fact, identifies the key technical design factors in a multicast-capable network and the challenges to face...
We designed, fabricated, and characterized a thin metalens that is capable of simultaneously manipulating the state of polarization and phase of incident light. The lens was manufactured in an amorphous silicon film of diameter 30 µm and has focal length of 633 nm. The lens converts a linearly polarized beam with wavelength of 633 nm into radially polarized light and produces a subwavelength focus...
Semiconductor organometallic halide (CH3NH3PbX3, X=Cl, Br, I) perovskites (HPVK) have been emerged as a potential gain media to construct a new generation of active photonic devices. Indeed, during the last three years a significant effort has been carried out to implement HPVK-based optical amplifiers or lasers with improved quality factors. In particular, minimization of the threshold of stimulated...
Planar optical waveguides and Bragg gratings were designed and written in various optical crystals with medium energy ion implantation. Some examples of the fabricated integrated optical elements are presented in this article: Planar optical waveguides fabricated in Er: LiNbO3 crystal by irradiation with 5 MeV N3+ ions, and Bragg gratings fabricated by multi-energy implantation into a silicon substrate...
A new type of layered photonic structure, whose alternating layers are filled with randomly dispersed nano-spheres, is fabricated and its optical properties are experimentally and theoretically analysed. Structures are made on a pullulan doped with chromium ions (dichromated pullulan - DCP) using holography. We found that experimental structures are similar to those observed on wings of the Diachrysia...
We furnish a general procedure for the geometric phase hologram (GPH) design, starting from the desired output phase profile and polarization states, and extending the theory of polarization gratings (PG) to arbitrary phase profiles. As an example, we consider the case of liquid crystal (LC) devices.
We report on our latest research in the field of nanostructured optical components fabricated using stack and draw technique. The concept of nanostructuring is based on the idea that the macroscopic optical properties of the system can be controlled by introduction of subwavelength elements. In some geometries even a single nanoinclusion can significantly change the performance of the device, in others...
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