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Widely tunable coupled-ring reflector laser diode

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3 Author(s)
Youngchul Chung ; Dept. of Electron. & Commun. Eng., Kwangwoon Univ., Seoul, South Korea ; Doo-Gun Kim ; Dagli, N.

A coupled-ring reflector (CRR), which is composed of two coupled rings both of which are coupled with a straight waveguide, is applied to a widely tunable laser diode. When the radii of two rings are slightly different, the peak reflection wavelength of the CRR can be widely tuned over a few tens nanometers by a small amount of refractive index change. It is shown that a few tens nanometers of tuning with a sidemode suppression ratio exceeding 45 dB both for adjacent cavity mode and for adjacent ring mode is achievable in the widely tunable CRR laser diode.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 9 )

Date of Publication:

Sept. 2005

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