&lt;title&gt;Characterization of optical waveguides with very different refractive-index contrasts&lt;/title&gt;

Ondráček, František; Skalsky, M.; Čtyroký, Jiřı́

doi:10.1117/12.675691

Cited by 3 publications

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“…By carefully aligning the core of fiber to the optical waveguide in the case of a 7.5 µm width X-cut In a 5.4 cm long X-cut Er 3+ :Ti:LiNbO 3 optical waveguide we obtained the value of α = 0 36 dB/cm for the losses due to the coupling of the radiation with the external, and for the group effective index = 2 343. These values are in good agreement with those published in literature [4].…”

Section: ∆K | Ksupporting

confidence: 83%

“…Considering that the attenuation coefficient and the mode reflectivity are not rapidly varying as a function of the radiation wavelength, λ, the group effective refractive index, may be determined in the form [4]:…”

Section: Theoretical Considerationsmentioning

confidence: 99%

“…For the measurement of optical losses, destructive and non-destructive methods are the techniques most commonly used. Over the past few years, several papers have addressed the measurement and evaluation of losses in the above mentioned optical waveguides [1][2][3][4][5]. Among the non-destructive techniques, some of the most commonly used are the interferometry methods [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of losses and group effective refractive index of Er3+:Ti:LiNbO3 optical waveguides

Vasile¹,

Puscas²

2011

Open Physics

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Abstract:In this paper, we report some experimental results concerning several types of loss measurements of Er 3+ :Ti:LiNbO 3 optical waveguides by using optical methods. Using the Fabry-Pérot interferometry method, we evaluated the attenuation coefficient of an optical waveguide resonator for a laser radiation having λ = 1 55 µm. We also evaluated the insertion losses, polarization dependent losses, and coupling with external losses. Additionally, from the transmitted spectra of the symmetrical monomode Fabry-Pérot optical waveguide resonator, we were able to evaluate the value of the group effective refractive index. 32.90.+a, 41.20.-q, 42.82.-m, 03.67.-a, 42.50.-p, 78.66.-w PACS (2008): Keywords:Er 3+

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Section: ∆K | Ksupporting

confidence: 83%

Section: Theoretical Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of losses and group effective refractive index of Er3+:Ti:LiNbO3 optical waveguides

Vasile¹,

Puscas²

2011

Open Physics

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“…The channel waveguide scattering loss was determined outside the Er absorption bands at 1600 nm using the Fabry-Perot resonator method [13]. Potassium channel waveguides exhibited losses as low as 0.18 dB/cm, while the losses of silver exchanged channel waveguides were in the range of 0.8-0.9 dB/cm.…”

Section: Spectroscopic and Waveguide Propertiesmentioning

confidence: 99%

Er–Yb Waveguide Amplifiers in Novel Silicate Glasses

Ondráček

Jágerská²,

Salavcova³

et al. 2008

IEEE J. Quantum Electron.

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Abstract-A set of novel silicate glasses containing ZnO and co-doped with Er 3+ and Yb 3+ was designed as substrates for optical waveguide amplifiers. Characterized by exceptionally low up-conversion, minimum Er concentration quenching and high mechanical as well as chemical stability, the reported glasses can compete with phosphate-based materials typically used in the state-of-art active devices. Straight channel waveguides with propagation losses as low as 0.18 dB/cm were fabricated in these substrates using Ag + Na + and K + Na + thermal ion exchange. Net on-chip gain values of 6.7 dB at 1537 nm were measured and a net fiber to-fiber gain of 5 dB was achieved when pumped at 976 nm. A six-level spatially resolved numerical model of an Er-Yb co-doped active waveguide was developed to analyze and optimize the amplifier performance. Modification of the rare-earth dopant concentration and the channel waveguide geometry was proposed to increase the gain figure and improve the overall amplifier efficiency.Index Terms-Channel waveguides, Er-Yb-doped glass, ion exchange, optical waveguide amplifier.

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All-in-one measurement setup for fast and accurate linear characterization of guided-wave optical devices

et al. 2007

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<title>Characterization of optical waveguides with very different refractive-index contrasts</title>

Cited by 3 publications

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Evaluation of losses and group effective refractive index of Er3+:Ti:LiNbO3 optical waveguides

Evaluation of losses and group effective refractive index of Er3+:Ti:LiNbO3 optical waveguides

Er–Yb Waveguide Amplifiers in Novel Silicate Glasses

All-in-one measurement setup for fast and accurate linear characterization of guided-wave optical devices

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