Automated Fiber Alignment Engines / Motorized Fiber Positioners / Piezo Scanners
نویسنده
چکیده
Analog Gradient Search This analog phase demodulation hill-climbing technique works for clean, quasi-Gaussian couplings already near optimal alignment. However it will lock-in on local maxima and “flat spots” which occur in multimode couplings, with imperfect devices, or far from optimum alignment. Nevertheless, instrumentation based on this principle was popular, though bulky and providing too little travel range for fully automated fiberalignment.
منابع مشابه
Collision Avoidance in Next-generation Fiber Positioner Robotic Systems for Large Survey Spectrographs
Some of the next generation massive spectroscopic survey projects, plan to use thousands of fiber positioner robots packed at a focal plane to quickly move in parallel the fiber-ends from the previous to the next target points. The most direct trajectories are prone to collision that could damage the robots and impact the survey operation. We thus present here a motion planning method based on ...
متن کاملSymposium on Undergraduate Research
ThEE2 1:45 PM: Beam alignment guide for laser experiments. Catherine R. DeMarco, Matthew E. Anderson, San Diego State Univ., USA. The Beam Alignment Guide for Laser Experiments (BAGLE) is an automated system that aligns visible and near-infrared optical beams. The responses of two quadrature detectors, located directly behind semi-transmissive mirrors, are analyzed electronically. A feedback lo...
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Many fiber-fed spectroscopic survey projects, such as DESI, PFS and MOONS, will use thousands of fiber positioners packed at a focal plane. To maximize observation time, the positioners need to move simultaneously and reach their targets swiftly. We have previously presented a motion planning method based on a decentralized navigation function for the collision-free coordination of the fiber po...
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Title of Dissertation: ANALYSIS AND EXPERIMENTAL DEMONSTRATION OF CONFORMAL ADAPTIVE PHASE-LOCKED FIBER ARRAY FOR LASER COMMUNICATIONS AND BEAM PROJECTION APPLICATIONS Ling Liu, Doctor of Philosophy, 2008 Dissertation Directed By: Professor Mikhail A. Vorontsov Institute for Systems Research and Department of Electrical and Computer Engineering, University of Maryland at College Park The primar...
متن کاملPiezoelectric Scanners for Atomic Force Microscopes: Design of Lateral Sensors, Identification and C - American Control Conference, 1999. Proceedings of the 1999
This paper presents the identification and control of piezoelectric positioners used in atomic force microscopes (AFM) with the goal of improving probe positioning on the sample surface. A novel sensor was developed for this task and employed to infer a sixth order linear two input two output model of the piezo’s lateral dynamics. The piezo model was used to design a controller for tracking ref...
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