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Photonics
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Electro-Optic Modulator
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Electro-Optic Modulator

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Optical Interaction Science".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 4893

Special Issue Editors

Dr. Rubab Amin

E-Mail Website
Guest Editor
IMRA America Inc., Boulder Research Labs, 1551 South Sunset St, Suite C, Longmont, CO 80501, USA
Interests: nanophotonics; plasmonics; electro-optic modulators; transparent conducting oxides; low-dimensional material photonics; optical cavities; thin films; light–matter interaction; nonlinear optics
Dr. Rishi Maiti

E-Mail Website
Guest Editor
Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY 10027, USA
Interests: 2D materials based on chip photonics; straintronics in photonics; quantum optoelectronics; optical interconnects; PCM-based reconfigurable photonics; nonvolatile photonic memory

Special Issue Information

Dear Colleagues,

This Special Issue invites manuscripts on current research and advances in electro-optic modulators.

Electro-optic modulators serve key aspects in data and telecommunication. A plethora of emerging applications in addition to the conventional data communications have attracted renewed widespread interest involving novel electro-optic modulation materials and schemes. This Special Issue is aimed at focusing on novel theoretical, numerical, and experimental works covering topics including, but not limited to, the following:

  • Recent advances in electro-optic modulators;
  • Free space and fiber coupled optical modulators;
  • Integrated modulators and switches in established platforms (Si, SiN, InP, etc.);
  • Nanophotonic and plasmonic modulators;
  • Ferroelectric materials-based modulation (BTO, LiNbO3, etc.);
  • Emerging materials-based modulation (2D, Polymers, Graphene, TCO, etc.);
  • Novel modulation schemes, complex formats and networks;
  • Physical effects in modulation (Pockels, Kerr, carrier dispersion, quantum-confined stark, Franz–Keldysh effects, etc.);
  • Novel and emerging applications for modulators (metamaterials, LiDAR, AI, deep learning, quantum information processing, sensing, microwave and RF photonics, phased arrays, etc.);
  • All optical modulation (saturable absorption, optical limiter, etc.)
  • Optical transceivers for next-generation high-speed circuits and integration drive circuitry.

Dr. Rubab Amin
Dr. Rishi Maiti
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Published Papers (2 papers)

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Research

11 pages, 2952 KiB  
Article
A Broadband High-Diffraction-Efficiency Electro-Optic Bragg Deflector Based on Monolithic Dual-Grating Periodically-Poled Lithium Niobate
by An-Chung Chiang, Yuan-Yao Lin, Shou-Tai Lin and Yen-Yin Lin
Photonics 2021, 8(7), 242; https://doi.org/10.3390/photonics8070242 - 28 Jun 2021
Viewed by 1485
Abstract
Electro-optic (EO) Bragg deflectors have been extensively used in a variety of applications. Recent developments show that bandwidths and deflection efficiencies, as well as angular bandwidths, would significantly limit the utilization of EO Bragg deflectors, especially for applications which need strong focusing, such [...] Read more.
Electro-optic (EO) Bragg deflectors have been extensively used in a variety of applications. Recent developments show that bandwidths and deflection efficiencies, as well as angular bandwidths, would significantly limit the utilization of EO Bragg deflectors, especially for applications which need strong focusing, such as intra-cavity applications. In this paper, we introduce a broadband EO Bragg deflector based on periodically-poled lithium niobate with a monolithic dual-grating design. We analyzed the deflection properties of this device by using a modified coupled wave theory and showed that this device can be still efficient for a small beam radius under strong focusing, whereas a single-grating one becomes very inefficient. Using a 1064-nm laser beam with a 100-μm beam radius, we obtained a 74% deflection efficiency with a 190-V bias voltage with a 0.5-mm-thick and 7.5-mm-long dual-grating sample. The acceptance angle for the Bragg condition of this device is as large as a few tens of mrad. The potential bandwidth of this device exceeds 500 nm if the proper operation region is chosen. Full article
(This article belongs to the Special Issue Electro-Optic Modulator)
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9 pages, 1939 KiB  
Communication
Automatic Bias Control Technique of Dual-Parallel Mach–Zehnder Modulator Based on Simulated Annealing Algorithm for Quadrupled Signal Generation
by Youngseok Bae, Sunghoon Jang, Sungjun Yoo, Minwoo Yi, Joonhyung Ryoo and Jinwoo Shin
Photonics 2021, 8(3), 80; https://doi.org/10.3390/photonics8030080 - 17 Mar 2021
Cited by 5 | Viewed by 2628
Abstract
The radio frequency (RF) signal generation method using an external modulator is widely used in microwave photonics applications because it has the advantage of being able to generate coherent and stable RF signals with a higher resolution performance compared to the conventional method. [...] Read more.
The radio frequency (RF) signal generation method using an external modulator is widely used in microwave photonics applications because it has the advantage of being able to generate coherent and stable RF signals with a higher resolution performance compared to the conventional method. A Mach–Zehnder modulator is widely used as an external modulator due to its high electro-optic coefficients and low attenuation characteristics but has a critical problem in that its electrical characteristics are changed by external environments such as temperature. In this paper, we considered the stabilization configuration to overcome this problem and propose an automatic bias control technique based on the simulated annealing algorithm of a dual-parallel Mach–Zehnder modulator (DPMZM) for quadruple signal generation. The proposed technique searches for the bias voltages of the modulator in real-time through the temperature test. In addition, the output of the quadrupled signal of the DPMZM is constantly controlled throughout the temperature range. Finally, it is confirmed that signals of a 10 GHz and 22 GHz frequency are generated using the intermediate frequency signals of a 2.5 GHz and 5.5 GHz frequency with the proposed automatic bias control technique, respectively. Full article
(This article belongs to the Special Issue Electro-Optic Modulator)
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