Polarization Bistable Characteristics of Mesa Structure 980 nm Vertical-Cavity Surface-Emitting Lasers
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概要
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The polarization bistable characteristics of 980 nm vertical-cavity surface-emitting lasers (VCSELs) with a mesa structure were experimentally studied. To achieve this, a distributed Bragg reflector mirror was processed into a rectangular mesa structure waveguide using inductively coupled plasma reactive ion etching and was buried with a polyimide layer. The VCSELs oscillated with single frequency and the lowest order transverse mode under CW operation at room temperature. Additionally, the VCSELs with a nearly-square mesa structure oscillated in either of the two orthogonal linear polarization states. Bidirectional polarization switching was demonstrated by two injection lights for the orthogonal linear polarization states. These results, together with the former results of polarization bistablity, which were observed in another type of VCSEL [Kawaguchi et al.: Electron. Lett. 31 (1995) 109], suggest that polarization bistability is a basic characteristic of square-shaped waveguide VCSELs.
- 2006-04-25
著者
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Sato Yuuki
Crest Japan Science And Technology Agency
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Kawaguchi Hitoshi
Crest Japan Science And Technology Agency
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Yamayoshi Yasuhiro
Faculty Of Engineering Yamagata Universtiy
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Mori Takashi
Crest Japan Science And Technology Agency
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Yamayoshi Yasuhiro
Faculty of Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
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Mori Takashi
CREST, Japan Science and Technology Agency, 4-1-8 Honmachi, Kawaguchi, Saitama 332-0012, Japan
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