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Fast all-optical processing is expected for packet routing in high-speed photonic networks. In photonic label networks, recognition of optical labels is one of the key functions. We propose a scalable passive waveguide device to recognize binary phase shift keying (BPSK) labels. The label recognition device consists of cascaded asymmetric X-junction couplers. The proposed basic device recognizes four...
Bug fixing accounts for a large amount of the software maintenance resources. Generally, bugs are reported, fixed, verified and closed. However, in some cases bugs have to be re-opened. Re-opened bugs increase maintenance costs, degrade the overall user-perceived quality of the software and lead to unnecessary rework by busy practitioners. In this paper, we study and predict re-opened bugs through...
This paper proposes a method for rendering an inter-reflection between a marker and a glossy floor in Augmented Reality (AR). At first, a reflectance ratio of the floor is estimated from the reflection on the floor and from the marker box directly. Then the roughness of the floor is estimated based on the sharpness of the reflected marker box image on the floor. Lastly, the marker box reflection is...
We proposed a fiber-based, asynchronous optical sampling THz time-domain spectroscopy system by combination of mode-locked Er-doped fiber lasers and photoconductive antennas. The proposed system will become a fast, compact, alignment-free, robust, and flexible apparatus without any mechanical moving parts.
We demonstrate a fast control of an octave-spanning fiber-based frequency comb with an intracavity electro-optic modulator. The servo bandwidth of both repetition and carrier-envelope offset frequency is greater than 200 kHz.
We propose a real-time, line-field THz-TDS imaging system based on electro-optical time-to-space conversion and line focusing of a THz beam. The proposed system functions as a color scanner in the terahertz spectral region with fast line-scanning and has been successfully used to image moving objects.
We demonstrate two-dimensional terahertz (THz) time-domain spectroscopic imaging of a moving object. It is based on real-time two-dimensional spatiotemporal THz imaging achieved by combined use of real-time measurement of temporal waveform and real-time one-dimensional imaging of a THz beam passing through a sample.
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