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13 March 2024 Free-space monolithic reflow-based fused silica fiber-to-fiber couplers
Daniel T. Echarri, Samuel Benketaf, Yves Bellouard
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Proceedings Volume PC12875, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV; PC128750B (2024) https://doi.org/10.1117/12.3000441
Event: SPIE LASE, 2024, San Francisco, California, United States
Abstract
Efficient and robust free-space light coupling in integrated systems is a challenging task for photonic devices. Here we propose a femtosecond laser process combined with CW laser thermal reflow for manufacturing a fiber-to-fiber free-space light-coupling device in fused silica. The monolithic free-space coupler design consists of two fiber holders and two ball lenses, used to achieve both, fiber-output collimation and fiber-injection. The device proved to efficiently work at 633 nm for single mode fiber coupling, which can be extended beyond the whole visible range with a simulated maximum efficiency of up to 90-95% of coupling.
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Daniel T. Echarri, Samuel Benketaf, and Yves Bellouard "Free-space monolithic reflow-based fused silica fiber-to-fiber couplers", Proc. SPIE PC12875, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV, PC128750B (13 March 2024); https://doi.org/10.1117/12.3000441
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KEYWORDS
Femtosecond phenomena
Continuous wave operation
Etching
Laser processing
Manufacturing
Glasses
Beam diameter
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