抄録
A sidemode suppression for a vertically and contra-directionally coupled semiconductor waveguide-type optical add-and-drop multiplexer is investigated theoretically and experimentally, by introducing a window function to a grating width. Grating configuration dependence of device characteristics was numerically calculated based on the finite element method and the coupled-mode equations. It was found that the sidemode suppression ratio (SMSR) could be improved to be more than 30dB even by a simple linear changing of the grating width. In the device fabrication, a trimmed grating was formed by a multi-step exposure method, including an interferometric exposure and a laser beam direct drawing. SMSR of 18 dB was obtained for a fabricated device, and improvement was obvious in contrast with a uniform grating. A comparison between the calculated and experimental results is also given.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 1273-1277 |
| ページ数 | 5 |
| ジャーナル | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| 巻 | 38 |
| 発行部数 | 2 B |
| 出版物ステータス | Published - 1999 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
これを引用
Sidemode suppression of optical add-and-drop multiplexer utilizing vertically coupled InGaAsP waveguides. / Horita, Masayoshi; Tanaka, Shinsuke; Matsushima, Yuichi.
：: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 巻 38, 番号 2 B, 1999, p. 1273-1277.研究成果: Article
}
TY - JOUR
T1 - Sidemode suppression of optical add-and-drop multiplexer utilizing vertically coupled InGaAsP waveguides
AU - Horita, Masayoshi
AU - Tanaka, Shinsuke
AU - Matsushima, Yuichi
PY - 1999
Y1 - 1999
N2 - A sidemode suppression for a vertically and contra-directionally coupled semiconductor waveguide-type optical add-and-drop multiplexer is investigated theoretically and experimentally, by introducing a window function to a grating width. Grating configuration dependence of device characteristics was numerically calculated based on the finite element method and the coupled-mode equations. It was found that the sidemode suppression ratio (SMSR) could be improved to be more than 30dB even by a simple linear changing of the grating width. In the device fabrication, a trimmed grating was formed by a multi-step exposure method, including an interferometric exposure and a laser beam direct drawing. SMSR of 18 dB was obtained for a fabricated device, and improvement was obvious in contrast with a uniform grating. A comparison between the calculated and experimental results is also given.
AB - A sidemode suppression for a vertically and contra-directionally coupled semiconductor waveguide-type optical add-and-drop multiplexer is investigated theoretically and experimentally, by introducing a window function to a grating width. Grating configuration dependence of device characteristics was numerically calculated based on the finite element method and the coupled-mode equations. It was found that the sidemode suppression ratio (SMSR) could be improved to be more than 30dB even by a simple linear changing of the grating width. In the device fabrication, a trimmed grating was formed by a multi-step exposure method, including an interferometric exposure and a laser beam direct drawing. SMSR of 18 dB was obtained for a fabricated device, and improvement was obvious in contrast with a uniform grating. A comparison between the calculated and experimental results is also given.
KW - Grating width
KW - Laser beam direct drawing
KW - Optical add-and-drop multiplexer
KW - Semiconductor waveguides
KW - Sidemode suppression
UR - http://www.scopus.com/inward/record.url?scp=0032624569&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032624569&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0032624569
VL - 38
SP - 1273
EP - 1277
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 2 B
ER -