Optical Power Splitter Based on Single Mode Directional Coupler Waveguide Using SnO2 Nanomaterial

Optical power splitter based on waveguide had been simulated numerically using Finite Difference Beam Propagation Method (FDBPM). Proposed waveguide was designed in the form of simple directional coupler waveguide. The waveguide was contained SnO2 nanomaterial as film or the guide part and the other supporting material as cladding with lower refractive index such as flint glasses. The waveguide used 2 μm of width to establish single-mode waveguide. The structure of waveguide is divided into three parts such as input, coupling and output part. While the waveguide was modified with angle in input and output parts to avoid coupling between waveguides. Furthermore, the proposed waveguide was analysed by varying the angle and coupling length. The analysed result shows that the waveguide has best performance in angle of 0.5 degrees and coupling length of 300 μm when the propagation loss was around 0.53%. Using the parameter, the output distribution percentage of waveguide approached 55%:44.5%. This performance indicated that the proposed waveguide can be used as optical power splitter. The application is very useful for optical telecommunication networking development.

Photonics: From European support to industrial technology leadership

Photonics support in the European programmes dates back to the early 90s, though the “Telematics” and “Esprit” initiatives (1983 to 1998) primarily focused on the then emerging field of optical telecommunication, fibre optics, optoelectronic, detectors and III-Vs and semiconductor lasers.

Development of NIR Emissive Fully-Fused Bisboron Complexes with π-Conjugated Systems Including Multiple Azo Groups

Development of novel near-infrared (NIR) emitters is essential for satisfying the growing demands of improving optical telecommunication and medical technology. We synthesized elemental skeletons composed of robust π-conjugated systems including...

Operation of a Single-Frequency Bismuth-Doped Fiber Power Amplifier near 1.65 µm

The spectral range between 1650 and 1700 nm is an interesting region due to its potential applications in optical telecommunication and optical-based methane sensing. Unfortunately, the availability of compact and simple optical amplifiers with output powers exceeding tens of milliwatts in this spectral region is still limited. In this paper, a single-frequency continuous-wave bismuth-doped fiber amplifier (BDFA) operating at 1651 and 1687 nm is presented. With the improved signal/pump coupling and modified pump source design, the output powers of 163 mW (at 1651 nm) and 197 mW (at 1687 nm) were obtained. Application of the BDFA to the optical spectroscopy of methane near 1651 nm is also described. We demonstrate that the BDFA can be effectively used for signal amplitude enhancement in photothermal interferometry.

C+L band wavelength and bandwidth tunable fiber laser incorporating carbon nanotubes

Spectral wavelength and bandwidth tunable mode-locking ultrafast fiber laser has widespread applications in the fields of optical telecommunication, spectroscopy, pump-probe measurements, and so on. Here, we report an single-wall carbon nanotube (SWCNT)-based wavelength and bandwidth tunable mode-locked fiber laser operation in the C[Formula: see text]L band. The output spectral wavelength and bandwidth can be continuously tuned by adjusting the intra-cavity tunable filter with a wavelength tuning range spanning [Formula: see text]70 nm (from 1539.8 nm to 1610.1 nm) and bandwidth from 0.5 nm to 4.5 nm, respectively. Our results provide a compact, mode-locked fiber laser wider in tuning range than the other systems for various applications requiring variable spectral wavelength or bandwidth.

Dynamic modeling of the birefringence effects induced in semiconductor optical amplifier for all-optical telecommunication systems

The semiconductor optical amplifiers (SOA) are all-optical multifunctional devices. The improvement of their performance will, therefore, be of great importance for modern optical telecommunication systems. We propose in this article to develop a dynamic model that enables us to simulate the dynamic behavior of SOA's birefringence effects. The determination of a numerical model is a multidisciplinary activity that needs engineering skills, optimization and physics. This numerical model enables to describe the propagation of a picosecond optical pulse passing through the SOA and takes into account its polarization and the phenomenon of energy coupling between the eigenmodes of SOA (TE mode and TM mode). In this paper, we will, first of all describe the numerical algorithm of our model, and then we will propose to make a dynamic characterization of the effect of the nonlinear polarization rotation in the SOA, which will allow us to study the all-optical logic gates as well as all the other digital components based on the nonlinear effect of birefringence in SOA.