Online digital compensation of phase and amplitude distortions in cascaded FOPA transmission links Long Nguyen, Aston University Poster Session Abstracts
Two-photon lithography for lanthanide-doped 3D ceramics microarchitectures with temperature promoted photoluminescence
Cristian Rosero Arias, University of Twente Two-photon lithography (TPL) is revolutionizing the creation of submicrometric 3D designs, particularly in integrated photonics and precision manufacturing of ceramic microarchitectures like zirconia (ZrO2). Lanthanide-doped ZrO2 microarchitectures are of utmost importance due to high-refractive index
Today mitigating stimulated Brillouin scattering (SBS) remains a significant challenge for the eventual penetration of fibre-optical parametric amplifiers (FOPAs) into future communication systems. The pump phase modulation that is often used for SBS mitigation causes temporal
variation of the parametric gain, which is primarily a source of phase distortion for coherently detected quadrature-amplitude modulation (QAM) signals. Here, we introduce a new and fully online digital signal processing (DSP) scheme that enables compensation of the intrinsic dithering-induced phase distortion and its conversion into amplitude distortion when interacting with the dispersive fibre channel in transmission systems with cascaded FOPAs operating with multi-tone pump dithering to support sufficient SBS-limited gain. Through extensive numerical simulations, we identify the required dimensioning for performance improvement and evaluate the scheme’s robustness against non-ideal conditions. We demonstrate that enhancing a conventional DSP chain with the proposed algorithm achieves significant performance benefits in 28-Gbaud 16-QAM transmission. We believe that our scheme may become a key component of future FOPA-amplified links, where pump dithering will be necessary to achieve high amplification gains..
ceramic that functions as a host and emitting-doping elements, which could enhance the functionalities of optical devices. However, suboptimal photoluminescence of lanthanide-doped ZrO2 microarchitectures is due to defects and non-ideal crystallinity in the manufacturing process. Here, we show that strategic thermal treatments can significantly refine the crystalline structure of ZrO2, thereby amplifying the luminescent response of lanthanide elements incorporated within these structures. Our results illustrate enhanced lanthanide photoluminescence in 3D microarchitectures, emphasizing the role of crystallinity. This approach diversifies the spectrum of sophisticated luminescent materials and paves the way for integrating additive manufacturing with microfabrication technologies within the micro-optics domain.
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Dissipative soliton breathing dynamics driven by desynchronization of orthogonal polarization states Qing Wang, Aston University
Experimental investigation of S-band optical amplifiers in long-haul coherent transmission systems D. Pratiwi, P. Hazarika, M. Tan, A. Donodin, and W. Forysiak, Aston University
Breathing solitons, e. g. dynamic dissipative solitons with oscillating pulse shape and energy caused by different mechanisms of spatiotemporal instabilities, received considerable interest from the aspects of nonlinear science and potential applications. However, by far, the study
Ultra-wideband transmission techniques are being explored as an alternative and essential solution to address the expanding demand for data capacity. Distributed Raman amplifiers, discrete Raman amplifiers, and Thulium-doped
of breathing solitons is still limited within the time scale of hundreds of cavity round trips, which ignores the slow dynamics. To fill this blank, we theoretically investigate a new type of vector dissipative soliton breathing regime and experimentally demonstrate this concept using mode locked fibre lasers, which arise from the desynchronization of orthogonal states of polarization in the form of complex oscillations of the phase difference between the states. The obtained results can reveal concepts in nonlinear science and may unlock approaches to the flexible manipulation of laser waveforms towards various applications in spectroscopy and metrology.
fibre amplifiers (TDFA) are potential technologies to provide signal amplification in the S-band (1470 nm to 1520 nm). We experimentally compare the performance of these S-band amplifiers in long-haul coherent transmission systems.
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Co-packaged 14xxnm Pump Chips for Raman Amplification Mostafa Rady, Coherent
Distributed Raman amplification is used through many parts of optical fibre networks. Raman pump modules require multiple high power dissipating lasers. With the drive to improve power efficiency in optical networks, co-packaging of pump chips in compact packages is essential to achieve this goal.
Design and performance is described of a hermetically sealed Raman pump laser with two independently driven laser diodes, each coupled to a fibre tail with an integrated Bragg grating for wavelength locking. The wavelength selection for each laser diode is fully customisable, allowing for similar or dissimilar wavelength configurations. Power dissipation and thermal management considerations are discussed, as well as the evaluation of thermal and optical crosstalk.
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