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Title: Selection of lasing direction in single mode semiconductor square ring cavities

Abstract

We propose and demonstrate a selection scheme of lasing direction by imposing a loss imbalance structure into the single mode square ring cavity. The control of the traveling direction is realized by introducing a taper-step section in one of the straight waveguides of the square ring cavity. It was shown by semi-analytic calculation that the taper-step section in the cavity provides effective loss imbalance between two travelling directions as the round trip repeats. Various kinds of square cavities were fabricated using InGaAsP/InGaAs multiple quantum well semiconductor materials in order to test the direction selectivity while maintaining the single mode. We also measured the pump power dependent lasing spectra to investigate the maintenance property of the lasing direction. The experimental results demonstrated that the proposed scheme is an efficient means for a unidirectional lasing in a single mode laser.

Authors:
; ; ;  [1]
  1. Department of Optical Engineering, Sejong University, 98 Kunja-Dong, Kwangjin-K, Seoul 143-747 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22494967
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 119; Journal Issue: 5; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; GALLIUM ARSENIDES; INDIUM ARSENIDES; LANTHANUM SELENIDES; LASERS; LOSSES; QUANTUM WELLS; SEMICONDUCTOR MATERIALS; SPECTRA; WAVEGUIDES

Citation Formats

Lee, Jin-Woong, Kim, Kyoung-Youm, Moon, Hee-Jong, and Hyun, Kyung-Sook. Selection of lasing direction in single mode semiconductor square ring cavities. United States: N. p., 2016. Web. doi:10.1063/1.4941104.
Lee, Jin-Woong, Kim, Kyoung-Youm, Moon, Hee-Jong, & Hyun, Kyung-Sook. Selection of lasing direction in single mode semiconductor square ring cavities. United States. https://doi.org/10.1063/1.4941104
Lee, Jin-Woong, Kim, Kyoung-Youm, Moon, Hee-Jong, and Hyun, Kyung-Sook. 2016. "Selection of lasing direction in single mode semiconductor square ring cavities". United States. https://doi.org/10.1063/1.4941104.
@article{osti_22494967,
title = {Selection of lasing direction in single mode semiconductor square ring cavities},
author = {Lee, Jin-Woong and Kim, Kyoung-Youm and Moon, Hee-Jong and Hyun, Kyung-Sook},
abstractNote = {We propose and demonstrate a selection scheme of lasing direction by imposing a loss imbalance structure into the single mode square ring cavity. The control of the traveling direction is realized by introducing a taper-step section in one of the straight waveguides of the square ring cavity. It was shown by semi-analytic calculation that the taper-step section in the cavity provides effective loss imbalance between two travelling directions as the round trip repeats. Various kinds of square cavities were fabricated using InGaAsP/InGaAs multiple quantum well semiconductor materials in order to test the direction selectivity while maintaining the single mode. We also measured the pump power dependent lasing spectra to investigate the maintenance property of the lasing direction. The experimental results demonstrated that the proposed scheme is an efficient means for a unidirectional lasing in a single mode laser.},
doi = {10.1063/1.4941104},
url = {https://www.osti.gov/biblio/22494967}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 5,
volume = 119,
place = {United States},
year = {Sun Feb 07 00:00:00 EST 2016},
month = {Sun Feb 07 00:00:00 EST 2016}
}