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Radiation in Bent Asymmetric Coupled Waveguides [article]

Pedro Chamorro-Posada
2018 arXiv   pre-print
A numerical study of the radiation in coupled bent waveguides is presented.  ...  fields (and propagation constants) and the transient propagation effects have been performed.  ...  VA089U16, and the Spanish Ministerio de Economa y Competitividad, Project No. TEC2015-69665-R.  ... 
arXiv:1802.04012v2 fatcat:iex5xo6xezachnv55uui55s7ai

Mode degeneration in bent photonic crystal fiber study by using the finite element method

B. M. Azizur Rahman, Namassivayane Kejalakshmy, Muhammad Uthman, Arti Agrawal, Tiparatana Wongcharoen, Kenneth T. V. Grattan
2009 Applied Optics  
It should be noted that the dispersion properties of the TE and TM polarized modes for both the core and cladding modes are similar.  ...  A PCF can support two fundamental H y 11 (quasi-TE) and H x 11 (quasi-TM) modes and for higher  and d/ values, a PCF can also support additional higher order modes of a given polarization.  ...  Variation of the total losses with the bending radius, R.  ... 
doi:10.1364/ao.48.00g131 pmid:19881634 fatcat:ctd2ovp3wrg6ncr52b7d3ak6zu

Development of hybrid optical simulation concepts for polymer waveguides [article]

Monali Suar, University, My
2021
Other bench-marking photonic components, such as, Y-branch, straight waveguide, bent waveguide and Mach-Zehnder interferometer were simulated using the CN-BPM approach.  ...  In particular, the case of self-written waveguides which are the interconnects written by light itself was examined.  ...  The scalar form of the TE mode, where the E field is polarized along the y axis can be brought to the following form: ∂ 2 E y ∂x 2 + (k 2 0 n 2 i − β 2 ) E y = 0 (2.12) The TM modes are the other set with  ... 
doi:10.15488/11174 fatcat:vctkdjnjcnds5kzeaprcdwrrg4

Beam Diagnostic Requirements: an Overview [article]

Gero Kube
2020 arXiv   pre-print
Beam diagnostics and instrumentation are an essential part of any kind of accelerator.  ...  There is a large variety of parameters to be measured for observation of particle beams with the precision required to tune, operate, and improve the machine.  ...  Wittenburg and N. Potylitsina-Kube (DESY) for discussions and help in the preparation of this lecture.  ... 
arXiv:2005.08389v1 fatcat:4e4ublmujfex5l5cii2qxd2sba

Mode Analysis and Applications of Three-Layer Step-Index and Depressed-Core Optical Fibers

XIAOKANG LIAN
2020
The rapid development of fiber optics over the past decades has been underpinned by various designs of the optical fibers and by the rapid improvement of the understanding of the waveguiding mechanisms  ...  Yuliya Semenova, head of the PRC, for her guidance and help in all areas of my research work. Yuliya provided and maintained a comfortable environment for my work in the PRC.  ...  The field intensity distributions of TM modes in Fig. 5.5(c) are similar with those of TE modes shown in Fig. 5.3(c).  ... 
doi:10.21427/9r2k-r557 fatcat:rnwvmq6v3jbk3byoamprsrt45m

Development of Fiber Bend Loss Edge Filter

Penfei Wang
2008
A single-mode step index fiber macrobending loss edge filter is investigated theoretically in terms of baseline loss, discrimination range and polarization dependent loss (PDL).  ...  Based on scalar approximation theory and the beam propagation method, a simulation platform is developed and used to predict the macrobending loss of singlemode fiber with single or multiple coating layers  ...  and TM , and the bend loss values, and , of the TE and TM modes can be TE BL TM BL calculated.  ... 
doi:10.21427/d7502h fatcat:vsemq47rone63j3nbltezgb6oe

Technologies for single chip integrated optical gyroscopes [article]

Muhammad Hassan Iqbal, University, The Australian National
2021
In particular, the sensing element requires very low propagation loss waveguides which can best be realised from Si3N4 or Ta2O5.  ...  , thermo-optic phase modulator and sensing cavity (resonator and waveguide loop).  ...  for that purpose and work can be done on them. Also, by using a polymer with higher thermal conductivity, the thermal time response can be improved substantially.  ... 
doi:10.25911/gd8p-ks70 fatcat:vqhzzu4qqrfmhkqnkszmszlom4

Hybrid integration towards single-chip Brillouin devices [article]

Choon Kong Lai, University, The Australian National
2021
The optimisation process for flame hydrolysis deposition of the 3% index contrast germanosilicate and its facet machining have been rigorously studied in this work.  ...  By overlaying the Brillouin active waveguide on a low loss versatile germanosilicate platform, a variety of linear functionalities such as ring resonators, Bragg gratings and tolerant couplers can be incorporated  ...  The working principle of the BPM method discussed above is scalar based.  ... 
doi:10.25911/p8pj-np59 fatcat:thlhzoy5gjcvtknn7allliatu4

Overview of the CLEAR plasma lens experiment

C.A. Lindstrøm, K.N. Sjobak, E. Adli, J.-H. Röckemann, L. Schaper, J. Osterhoff, A.E. Dyson, S.M. Hooker, W. Farabolini, D. Gamba, R. Corsini
2018 Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers, Detectors and Associated Equipment  
Still, many questions remain concerning such lenses, including their transverse field uniformity, limitations due to plasma wakefields and whether they can be combined in multi-lens lattices in a way to  ...  All the subsystems have been constructed, tested and integrated into the CLEAR beam line, and are ready for experiments starting late 2017.  ...  Additional research was also conducted during the PhD period, resulting in several coauthored papers not considered part of the core thesis narrative. ACKNOWLEDGEMENTS  ... 
doi:10.1016/j.nima.2018.01.063 fatcat:54fovdovn5f75jyjyevvncl2jq

Annual Report 2003

AA.VV.
2004
For the first time, it is also nice to see an account of the excellent initiatives that LNF has staged in the past years in the field of the formation and outreach.  ...  has come swiftly to operation and has immediately started to produce excellent results in the field of the hypernuclei; for the external activities, the discovery of a possible pentaquark state by the  ...  The two curves refer to different polarization fields in the capacitive transducer.  ... 
doi:10.15161/oar.it/1449011765.56 fatcat:63plnt75xrfd3esljeoxh2wvtq