High-Resolution Optical Broadband Monitoring for the Production of Miniaturized Thin-Film Filters

Carstens, Florian; Ehlers, Henrik; Schlichting, S.; Jensen, Lars; Ristau, Detlev

doi:10.1364/oic.2019.wa.7

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…The total design coating thickness was 22.87 µm, and the individual layer thicknesses were below 390 nm. A high layer thickness accuracy was maintained during the IBS coating production by in situ high-resolution broadband monitoring [15] based on transmission measurements on a fused silica sample placed in the same substrate holder as the PVA coated silicon wafers and is simultaneously coated. We observed a good adhesion of the first sputtered layer (TiO 2 ) to the sacrificial PVA layer.…”

Section: B Ibs Thin-film Filtermentioning

confidence: 99%

“…We have previously reported on our miniaturized thin-film filters on a polymer substrate [15], where the spin coated polymer layer is of optical quality and has a typical thickness of 4 µm. To compare these to the novel type of filters, we considered the case of two standard single-mode fibers with FC/PC connectors with a miniaturized CWDM filter element for 1311 nm with an edge length of 250 µm placed between the facets of the fibers.…”

Section: Comparison To Miniaturized Filters On Polymer Substratementioning

confidence: 99%

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Substrate-free miniaturized thin-film filters for single-element coarse wavelength division multiplexing fibers

Rüsseler

Gehrke²,

Carstens³

et al. 2023

Appl. Opt.

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We have created high-precision, miniaturized, substrate-free filters, based on ion beam sputtering on a sacrificial substrate. The sacrificial layer is cost efficient and environmentally friendly and can be dissolved using only water. We demonstrate an improved performance compared to filters on thin polymer layers from the same coating run. With these filters, a single-element coarse wavelength division multiplexing transmitting device for telecommunication applications can be realized by inserting the filter between fiber ends.

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Section: B Ibs Thin-film Filtermentioning

confidence: 99%

Section: Comparison To Miniaturized Filters On Polymer Substratementioning

confidence: 99%

Substrate-free miniaturized thin-film filters for single-element coarse wavelength division multiplexing fibers

Rüsseler

Gehrke²,

Carstens³

et al. 2023

Appl. Opt.

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show abstract

“…The filter design was deposited on sacrificial substrates in an ion beam sputtering process [35]. To achieve a high layer thickness accuracy, in situ process control with a high resolution optical broadband monitor was used [37]. With this monitoring system, the layer thicknesses are calculated from in situ transmission measurements on a fused silica sample.…”

Section: Thin-film Filtermentioning

confidence: 99%

Miniaturized thin-film filters to connect multiple self-written waveguides

Günther

Kushwaha

Rüsseler

et al. 2023

J. Opt.

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Self-written waveguides (SWW) have been well investigated within the last decades. In most cases, they are used as low-loss coupling structures, i.e. to connect buried optical structures in photonic integrated circuits. In our work, we extend the ﬁeld of possible applications for SWWs by embedding a novel thin-ﬁlm ﬁlter to split the beam and connect multiple output ports simultaneously. The multilayer design of the dielectric ﬁlter can be customized to enable its application as dichroic beamsplitter for photonic networks. The embedded thin-ﬁlm ﬁlter was characterized in detail and used to connect an additional optical sensing element, which is also based on SWWs, to demonstrate its usability for measurement of physical quantities.

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“…The ITO target consisted of 90 % indium and 10 % tin. The layer thicknesses were controlled via an in-situ broadband monitor measuring the transmission of the coated samples [18]. The actual design presented in this work is based on a (HL) 6 ITO(LH) 6 structure, with an initial thickness of the ITO-layer of 2 QWOT.…”

Section: Coating Materials and Manufacturingmentioning

confidence: 99%

Nonlinear optical switching in thin film coatings in relation to the damage threshold

Steinecke

Kiedrowski

Jupé

et al. 2022

Laser-Induced Damage in Optical Materials 2022

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We demonstrate a novel concept for an all-optical switch based on the optical Kerr-effect in thin film interference coatings. The switching between transmittance and reflectance relies on highly Kerr-active coating materials in combination with large internal intensity enhancement in thin film interference coatings. The paper investigates the switching performance as well as its relation to the laser induced damage threshold of these novel components. A modulation depth of 30 % was achieved without damage to the component, which very promising for later applications as power limiters or mode locking components.

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High-Resolution Optical Broadband Monitoring for the Production of Miniaturized Thin-Film Filters

Cited by 4 publications

References 2 publications

Substrate-free miniaturized thin-film filters for single-element coarse wavelength division multiplexing fibers

Substrate-free miniaturized thin-film filters for single-element coarse wavelength division multiplexing fibers

Miniaturized thin-film filters to connect multiple self-written waveguides

Nonlinear optical switching in thin film coatings in relation to the damage threshold

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