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The nonlinear optical properties of conjugated rhenium containing azo-based iminopyridine complexes were studied by means of Maker fringe technique using 30 ps laser pulses at 1064 nm. The influence of UV irradiation of guest-host films on nonlinear optical response was investigated. The values of second and third order susceptibility before and after UV irradiation were extracted and analyzed. The...
Realizing CMOS-compatible integrated lasers on silicon is a crucial step towards cost-efficient, high-functional optoelectronic integrated circuits (OEICs). Here, we report on a concept to embed active optical devices based on a bonded III–V epitaxial layer stack between the FEOL and BEOL of a CMOS silicon photonics chip. Ultra-shallow laser devices are realized with this concept and optically-pumped...
Two geometries are usually considered for direct laser writing of waveguide in glass that differ mainly from the way the sample is translated in regard to the laser beam propagation direction, namely transversely or longitudinally. In this contribution we report on waveguide of multi-core type composed of positive refractive index channel aligned on a hexagonal lattice and written using an alternative...
In this paper amplitude Fresnel zone plates (ZPs) with silver and chromium relief on silica glass are theoretically and experimentally investigated. Study of the focal spot characteristics versus the height of chromium and silver ring of ZP was carried out. It showed that the height of the relief of 70 nm allows to achieve an optimum ratio of the width and the intensity of the focal spot. Also, the...
This work presents the nonlinear optical investigations of the neodymium (III) oxide thin films. Studied inorganic films were produced by physical vapor deposition (PVD) technique on glass substrate in high vacuum. The nonlinear optical properties were measured by using Nd:YAG laser at 1064 nm wavelength. Using the Maker fringe technique the third harmonic generation process was investigated. The...
In this paper, we demonstrate optical injection locking in the 2 µm wavelength region between two discrete semiconductor lasers. We will highlight how such behaviour can be used as a key enabling technology in this new wavelength window, motivated by system improvements such as better filtering and linewidth reduction for advanced modulation formats.
A universal simulation model for rare earth doped cw fibre lasers is presented. The model is based on generic rate and gain equations and therefore is very compact. It can be used for any fibre doped with one or several rare earth ions. The model allows for spectral simulations as well as radial discretization of the fibre. An algorithm was developed which optimizes the longitudinal fibre segmentation...
We report on our direct experimental observation of a new regime of operation of passively mode-locked fibre lasers where the laser oscillator generates pulsating solitons with extreme ratios of maximal to minimal intensities in each period of pulsations. The soliton spectra also experience large periodic broadening and compression. Spatio-temporal intensity and dispersive Fourier-transformation measurements...
The impact of the laser phase noise on the inter-core crosstalk (ICXT) of orthogonal frequency division multiplexing (OFDM) multicore fiber (MCF) based systems employing direct detection (DD) is experimentally investigated. Random fluctuations of the ICXT and system performance induced by the laser phase noise are observed in both time and frequency. The origin of these fluctuations is the random...
The derivatives based on tetrathiafulvalene (TTF) are among the molecules which are characterized by their high nonlinear optical properties and are electro-actives molecules. When the TTF molecules and their derivatives are bonded to electron acceptors in order to forming D -A system, the intermolecular charge transfer (ICT) can be induced under light excitation, because tetrathiafulvalene are known...
Monolithic two-section quantum well semiconductor lasers are promising sources for the generation of short pulses in the single-digit picosecond range by passive mode-locking and at high pulse repetition frequencies exceeding 40 GHz. Laser emission at around 1070 nm makes them ideal candidates for potential light amplification in Ytterbium doped fiber amplifiers and application in data transmission...
The microchip lasers, being sources of coherent light, suffer from one serious drawback: low spatial quality of the beam, strongly reducing the brightness of emitted radiation. Attempts to improve the beam quality, such as pump-beam guiding, external feedback, either strongly reduce the emission power, or drastically increase the size and complexity of the lasers. Here we propose that specially designed...
In this article the composite author dealt with measurement possibilities of polarization states of light source emitting 1550 nm which was affected by atmospherically transmission environment in special acrylate box 2.5 m long. The Polarimeter Thorlabs TXP 5004 and the External Sensor Head PAN5710IR3 measured the changes of polarization parameters, ellipticity and azimuth, defining placement on the...
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