Topic
Optical modulator
About: Optical modulator is a research topic. Over the lifetime, 14068 publications have been published within this topic receiving 196932 citations.
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09 Jan 2015TL;DR: In this paper, the optical transmitter is configured to emit the optical beam with a divergence angle greater than 0.1 degrees, and with a photonic efficiency of less than 1.05%.
Abstract: An apparatus is provided that includes a modulator and an optical transmitter coupled to the modulator and configured to emit an optical beam that the modulator is configured to modulate with data. The optical transmitter may thereby be configured to emit the optical beam carrying the data and without artificial confinement for receipt by an optical receiver configured to detect and recover the data from the optical beam. The optical transmitter may be configured to emit the optical beam with a divergence angle greater than 0.1 degrees, and with a photonic efficiency of less than 0.05%. The photonic efficiency may relate a number of photons of the optical beam detectable by the optical receiver, to a number of photons of the optical beam emitted by the optical transmitter.
46 citations
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11 Sep 1991TL;DR: In this paper, a modulating signal is predistorted to linearize the output of an optical intensity modulator, which is then combined with the distorted signal from the second path to provide a pre-defined signal for use in modulating a light source.
Abstract: A modulating signal is predistorted to linearize the output of an optical intensity modulator. The modulating signal is split into first and second paths. In the first path, the signal is phase shifted. In the second path, distortion components are introduced. The phase shifted signal from the first path is then combined with the distorted signal from the second path to provide a predistorted signal for use in modulating a light source. The distortion generator can comprise a diode pair coupled with opposite polarities in parallel. Both diodes are forward biased, and the pair is coupled in series with the input signal to provide the desired predistortion.
46 citations
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TL;DR: In this article, a resonant-type LiNbO/sub 3/ optical modulator with symmetric stubs and modulating electrodes was investigated and the enhancement factor of the fabricated modulator was 3.41 at 10 GHz.
Abstract: A resonant-type LiNbO/sub 3/ optical modulator with symmetric stubs and modulating electrodes was investigated. Modulation efficiency was enhanced by the resonance of the modulating electrode. The enhancement factor of the fabricated modulator was 3.41 at 10 GHz.
46 citations
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TL;DR: Broadband atomic-layer MoS2 optical modulators for the visible ultrafast pulse generation are developed and selected based on the proposed design criteria for novel two-dimensional (2D) optical modulator.
Abstract: Visible lasers are a fascinating regime, and their significance is illustrated by the 2014 Noble prizes in physics and chemistry. With the development of blue laser diodes (LDs), the LD-pumped solid-state visible lasers become a burgeoning direction today. Constrained by the scarce visible optical modulators, the solid-state ultrafast visible lasers are rarely realized. Based on the bandgap structure and optoelectronic properties of atomic-layer MoS2, it can be proposed that MoS2 has the potential as a visible optical modulator. Here, by originally revealing layer-dependent nonlinear absorption of the atomic-layer MoS2 in the visible range, broadband atomic-layer MoS2 optical modulators for the visible ultrafast pulse generation are developed and selected based on the proposed design criteria for novel two-dimensional (2D) optical modulators. By applying the selected MoS2 optical modulators in the solid-state praseodymium lasers, broadband mode-locked ultrafast lasers from 522 to 639 nm are originally realized. We believe that this Letter should promote the development of visible ultrafast photonics and further applications of 2D optoelectronic materials.
46 citations
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30 Dec 1987
TL;DR: An image pickup device comprises an optical modulator element (3, 53, 103) having a function of storing an optical image information of an image which is formed thereon, an imaging lens (1, 51, 121) for making an image formation of an optical images of an object on the optical modulation element, and a device (4-12, 54-57, 73-75, 77, 124-126, 128, 131) for reading the optical image image information from the optical modulation element and for generating an image information corresponding to the optical images formed on the
Abstract: An image pickup device comprises an optical modulator element (3, 53, 103) having a function of storing an optical image information of an optical image which is formed thereon, an imaging lens (1, 51, 121) for making an image formation of an optical image of an object on the optical modulator element, and a device (4-12, 54-57, 73-75, 77, 124-126, 128, 131) for reading the optical image information from the optical modulator element and for generating an image information corresponding to the optical image of the object formed on the optical modulator element.
46 citations