High-speed, high-accuracy 400-GHz wavelength switching at tunable distributed amplification (TDA-) DFB laser using feedforward control

2015 ◽  
Author(s):  
Y. Tatsumoto ◽  
H. Onji ◽  
R. Kimura ◽  
K. Kato ◽  
H. Ishi ◽  
...  
Keyword(s):  
High Speed ◽  
Feedforward Control ◽  
High Accuracy ◽  
Wavelength Switching ◽  
Dfb Laser

High-Speed Wavelength Switching at TDA-DFB Laser Based on a Nonlinear Model

2020 ◽  
Vol 32 (21) ◽  
pp. 1377-1380
Author(s):  
Yuri Niiya ◽  
Takeshi Kuboki ◽  
Kazutoshi Kato
Keyword(s):  
Nonlinear Model ◽  
High Speed ◽  
Wavelength Switching ◽  
Dfb Laser

scholarly journals Multi-Touch Interaction Generation Device by Spatiotemporally Switching Electrodes

Electronics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1475
Author(s):  
Masahiro Okamoto ◽  
Kazuya Murao
Keyword(s):  
High Speed ◽  
High Accuracy ◽  
Conductive Ink ◽  
Control Board ◽  
Touch Panel ◽  
Electrode Size ◽  
Touch Input ◽  
Touch Interaction ◽  
Multiple Electrodes ◽  
Touch Panels

With the spread of devices equipped with touch panels, such as smartphones, tablets, and laptops, the opportunity for users to perform touch interaction has increased. In this paper, we constructed a device that generates multi-touch interactions to realize high-speed, continuous, or hands-free touch input on a touch panel. The proposed device consists of an electrode sheet printed with multiple electrodes using conductive ink and a voltage control board, and generates eight multi-touch interactions: tap, double-tap, long-press, press-and-tap, swipe, pinch-in, pinch-out, and rotation, by changing the capacitance of the touch panel in time and space. In preliminary experiments, we investigated the appropriate electrode size and spacing for generating multi-touch interactions, and then implemented the device. From the evaluation experiments, it was confirmed that the proposed device can generate multi-touch interactions with high accuracy. As a result, tap, press-and-tap, swipe, pinch-in, pinch-out, and rotation can be generated with a success rate of 100%. It was confirmed that all the multi-touch interactions evaluated by the proposed device could be generated with high accuracy and acceptable speed.

scholarly journals High Speed Direct Modulation of a Heterogeneously Integrated InP/SOI DFB Laser

2016 ◽  
Vol 34 (8) ◽  
pp. 1683-1687 ◽  
Author(s):  
Amin Abbasi ◽  
Christos Spatharakis ◽  
Giannis Kanakis ◽  
Nuno Sequeira Andre ◽  
Hadrien Louchet ◽  
...  
Keyword(s):  
High Speed ◽  
Direct Modulation ◽  
Dfb Laser

High-Speed End Milling Using a Feedforward Control Architecture

1996 ◽  
Vol 118 (2) ◽  
pp. 178-187 ◽  
Author(s):  
E. D. Tung ◽  
M. Tomizuka ◽  
Y. Urushisaki
Keyword(s):  
High Speed ◽  
Feedforward Control ◽  
End Milling ◽  
Phase Error ◽  
Cutting Speed ◽  
Frequency Domain Analysis ◽  
Maximum Speed ◽  
Drive Control ◽  
Machining Errors ◽  
Feedforward Controller

Experiments are performed for end milling aluminum at 15,000 RPM spindle speed (1,508 m/min cutting speed) and up to 3 m/min table feedrate using an experimental machine tool control system. A digital feedforward controller for feed drive control incorporates the Zero Phase Error Tracking Controller (ZPETC) and feedforward friction compensation. The controller achieves near-perfect (±3 μm) tracking over a 26 mm trajectory with a maximum speed of 2 m/min. The maximum contouring error for a 26 mm diameter circle at this speed is less than 4 μm. Tracking and contouring experiments are conducted for table feedrates as high as 10 m/min. Frequency domain analysis demonstrates that the feedforward controller achieves a bandwidth of 10 Hz without phase distortion. In a direct comparison of accuracy, the machining errors in specimens produced by the experimental controller were up to 20 times smaller than the errors in specimens machined by an industrial CNC.

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