Low-loss optical single-mode waveguide platform in thin glass with wide spectral range

H. Schröder; J. Schwietering; O. Kirsch; Ph. Wachholz; W. Lewoczko-Adamczyk

doi:10.1117/12.2611775

5 March 2022 Low-loss optical single-mode waveguide platform in thin glass with wide spectral range

H. Schröder, J. Schwietering, O. Kirsch, Ph. Wachholz, W. Lewoczko-Adamczyk

Proceedings Volume 12007, Optical Interconnects XXII; 120070D (2022) https://doi.org/10.1117/12.2611775
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Current developments are pushing the integration of optical technologies deeper into the architecture of data centers,1 a trend in which co-packaging figures prominently due to its many inherent advantages2, 3. Several materials are used as a basis for these co-packaged platforms, but glass stands out for its many positive properties, such as high thermal and dimensional stability, great optical transparency, excellent high-frequency properties for electric circuits, and extremely low cost. To seize these advantages, we pursued an approach called electro-optical circuit board (EOCB), in which optical and electrical interconnections are realized by glass-integrated optical waveguides and electrical circuits on both sides of the glass board. An ion-exchange technique was developed to integrate low-loss optical single-mode waveguides into large-sized glass boards (457 mm x 303 mm). In the reported work, the next milestone in developing this process was achieved by reducing the diffusion metal mask opening’s width from 6 μm to 3 μm by mask-less laser patterning. These smaller mask opening allow for optical waveguides with a more circular modal field shape resulting in smaller coupling losses to optical fibers. Additionally, the reduction of propagation losses of multi-mode waveguides for wavelengths down to the visible range was achieved. This opens up the field of sensing and quantum application to EOCBs.

Citation Download Citation

H. Schröder, J. Schwietering, O. Kirsch, Ph. Wachholz, and W. Lewoczko-Adamczyk "Low-loss optical single-mode waveguide platform in thin glass with wide spectral range", Proc. SPIE 12007, Optical Interconnects XXII, 120070D (5 March 2022); https://doi.org/10.1117/12.2611775

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KEYWORDS

Glasses

Waveguides

Integrated optics

Single mode fibers

Diffusion

Metals

Optics manufacturing

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