Lensed Fiber-Array Assembly With Individual Fiber Fine Positioning in the Submicrometer Range

Abstract

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Integration of laser-support fiber adjustment in opto-electronic modules

“…Detailed information on this can be found in ref. [8]. The coupling losses of the lensed fiber tips and InP-based waveguides are improved from -6 dB to -3 dB.…”

High precision optical fiber alignment using tube laser bending

“…However, the heat input to the legs of this actuator requires careful planning of the irradiations to prevent excessive heating of the fiber and adhesives. Zandvoort et al [12] aligned multiple optical fibers with respect to an optical chip, using laser forming to shorten the four legs in a '+' shaped actuator. Multiple actuators were stacked to align an array of fibers individually, each with an accuracy of 0.25 μm.…”

Laser forming for sub-micron adjustment: with application to optical fiber assembly

“…The smallest displacement achieved with this actuator was 0.2 µm. (b): Multiple fibers are aligned using four '+' shaped actuator windows [32]. The final fiber-tip position accuracy using this actuator was within ±0.25 µm.…”

“…However, the heat input to the legs of this actuator requires careful planning of the irradiations to prevent excessive heating of the fiber and adhesives. Zandvoort et al [32] aligned multiple optical fibers with respect to an optical chip, using the UM with four legs in a '+' shaped actuator, see Fig 1.9b. Multiple actuators were stacked to align an array of fibers individually, each with an accuracy of 0.25 µm.…”

“…Laser micro-forming has been used widely in applications where high precision position adjustments are needed. Different actuator configurations are extensively studied, including two-and three bridge actuators [30,41,50], plate bending actuators [40] or star actuators [31,32,43]. Those actuators allow for position adjustments in one or more directions with sub-micrometer accuracy.…”