Tag Archives: etching

Output beam engineering with 2-step ridge etching

March 17, 2023 by Modulight Content
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Presented in: SPIE OPTO 2023 Authors: Riina Ulkuniemi, Ville Vilokkinen, Petri Melanen, Petteri Uusimaa    Presented in: SPIE OPTO 2023 Authors: Riina Ulkuniemi, Ville Vilokkinen, Petri Melanen, Petteri Uusimaa   Silicon photonics offers platforms to build mass-producible optical circuits. Extremely small optical components are required for this purpose, so fiber coupled systems are an order of magnitude too large. In order to successfully integrate laser source to the circuits, output beam properties have to be controlled and desired for the purpose. When fabricating single-mode ridge waveguide (RWG) laser diodes, ridge width has to be narrow enough for ensuring single-mode operation. Continue reading →

High-efficiency vertically-emitting chipsets for 3D and proximity sensing

March 5, 2021 by Modulight Content
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Published in: SPIE LASE 2021 Authors: K. Nechay, R. Ulkuniemi, A. Filipchuk, T. Hartikainen, V. Kaivosoja, R. Hietikko, J. Nikkinen, J. Sillanpaa, P. Melanen, V. Vilokkinen, S. Talmila, P. Uusimaa  Published in: SPIE LASE 2021 Authors: K. Nechay, R. Ulkuniemi, A. Filipchuk, T. Hartikainen, V. Kaivosoja, R. Hietikko, J. Nikkinen, J. Sillanpaa, P. Melanen, V. Vilokkinen, S. Talmila, P. Uusimaa Vertical-cavity surface-emitting lasers (VCSELs) have just recently started generating a lot of interest as the illumination source in the multitude of commercial applications. VCSELs capability to provide narrow spectrum emission with low temperature sensitivity and high beam quality, coupled with the possibility of nanosecond pulses generation, makes VCSELs an excellent laser platform for the outdoors, high-precision Continue reading →