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Title: Sub-gigahertz beam switching of vertical-cavity surface-emitting laser with transverse coupled cavity

Abstract

We report a high-speed electrical beam switching of vertical cavity surface emitting laser with a transverse coupled cavity. A high speed (sub-gigahertz) and large deflection angle (>30°) beam switching is demonstrated by employing the transverse mode switching. The angular switching speed of 900 MHz is achieved with narrow beam divergence of below 4° and extinction ratio of 8 dB. We also measured the near- and far-field patterns to clarify the origin of the beam switching. We present a simple one-dimensional Bragg reflector waveguide model, which well predicts the beam switching characteristic.

Authors:
; ;  [1];  [2]; ;  [3];  [1];  [4]
  1. Photonics Integration System Research Center, Tokyo Institute of Technology, 4259-R2-22, Nagatsuta, Midori-ku, Yokohama 226-8503 (Japan)
  2. Semiconductor and MEMS Processing Center, Tokyo Institute of Technology, 4259-R2-22, Nagatsuta, Midori-ku, Yokohama 226-8503 (Japan)
  3. Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589 (Saudi Arabia)
  4. (Saudi Arabia)
Publication Date:
OSTI Identifier:
22489105
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 7; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BEAMS; LASERS; MHZ RANGE 100-1000; ORIGIN; SURFACES; VELOCITY; WAVEGUIDES

Citation Formats

Nakahama, M., Gu, X., Sakaguchi, T., Matsutani, A., Ahmed, M., Bakry, A., Koyama, F., and Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589. Sub-gigahertz beam switching of vertical-cavity surface-emitting laser with transverse coupled cavity. United States: N. p., 2015. Web. doi:10.1063/1.4929147.
Nakahama, M., Gu, X., Sakaguchi, T., Matsutani, A., Ahmed, M., Bakry, A., Koyama, F., & Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589. Sub-gigahertz beam switching of vertical-cavity surface-emitting laser with transverse coupled cavity. United States. doi:10.1063/1.4929147.
Nakahama, M., Gu, X., Sakaguchi, T., Matsutani, A., Ahmed, M., Bakry, A., Koyama, F., and Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589. Mon . "Sub-gigahertz beam switching of vertical-cavity surface-emitting laser with transverse coupled cavity". United States. doi:10.1063/1.4929147.
@article{osti_22489105,
title = {Sub-gigahertz beam switching of vertical-cavity surface-emitting laser with transverse coupled cavity},
author = {Nakahama, M. and Gu, X. and Sakaguchi, T. and Matsutani, A. and Ahmed, M. and Bakry, A. and Koyama, F. and Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589},
abstractNote = {We report a high-speed electrical beam switching of vertical cavity surface emitting laser with a transverse coupled cavity. A high speed (sub-gigahertz) and large deflection angle (>30°) beam switching is demonstrated by employing the transverse mode switching. The angular switching speed of 900 MHz is achieved with narrow beam divergence of below 4° and extinction ratio of 8 dB. We also measured the near- and far-field patterns to clarify the origin of the beam switching. We present a simple one-dimensional Bragg reflector waveguide model, which well predicts the beam switching characteristic.},
doi = {10.1063/1.4929147},
journal = {Applied Physics Letters},
number = 7,
volume = 107,
place = {United States},
year = {Mon Aug 17 00:00:00 EDT 2015},
month = {Mon Aug 17 00:00:00 EDT 2015}
}
  • We propose a strategy to performing ultrafast directional beam switching using two coupled vertical-cavity surface-emitting lasers (VCSELs). The proposed strategy is demonstrated for two VCSELs of 5.6 {mu}m in diameter placed about 1 {mu}m apart from the edges, showing a switching speed of 42 GHz with a maximum far-field angle span of about 10{degree}. {copyright} 2001 American Institute of Physics.
  • Data are presented demonstrating the optically coupled operation of a 3{times}3 two-dimensional array of Al{sub {ital x}}Ga{sub 1{minus}{ital x}}As-GaAs vertical-cavity surface-emitting lasers. Room-temperature threshold current for the array is 90 mA, with the device geometry allowing for light emission from the epitaxial side of the device.
  • A theoretical study is performed of the multimode dynamics and steady-state transverse-mode selection in vertical-cavity surface-emitting lasers subject to weak optical feedback in an external-cavity configuration. Attention is focused on the competition between the two lowest-order modes (LP{sub 01} and LP{sub 11} degenerate modes) appropriate to the chosen circularly symmetric vertical-cavity surface-emitting laser structure. It is shown that preferential excitation of either mode can be effected by appropriate choice of optical feedback delay. Opportunities for enhancing modal discrimination by adjusting the strength of optical feedback are also presented. {copyright} {ital 1996 Optical Society of America.}
  • A schematic solution is proposed for creating a highly efficient switching network with fully connected switching topology for use in supercomputers and telecommunication systems. An important characteristic of this solution is the use of vertical-cavity surface-emitting semiconductor laser arrays and polarising beamsplitters. Estimates show that the commercially available elemental base can be used for a practical realisation of an optoelectronic switching network with basic parameters and functional properties that are superior to those in known electronic analogues. (laser applications and other topics in quantum electronics)
  • We report the experimental observation of circular polarization switching (PS) and polarization bistability (PB) in a 1300 nm dilute nitride spin-vertical cavity surface emitting laser (VCSEL). We demonstrate that the circularly polarized optical signal at 1300 nm can gradually or abruptly switch the polarization ellipticity of the spin-VCSEL from right-to-left circular polarization and vice versa. Moreover, different forms of PS and PB between right- and left-circular polarizations are observed by controlling the injection strength and the initial wavelength detuning. These results obtained at the telecom wavelength of 1300 nm open the door for novel uses of spin-VCSELs in polarization sensitive applications in futuremore » optical systems.« less