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Total internal reflection mirror-based InGaAsP ring resonators integrated with optical amplifiers

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6 Author(s)
Kim, Doo Gun ; Electr. & Comput. Eng. Dept., Univ. of California, Santa Barbara, CA, USA ; JaeHyuk Shin ; Ozturk, C. ; Jong Chang Yi
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Novel ring resonators combining very small multimode interference (MMI) couplers, low loss total internal reflection (TIR) mirrors, and a semiconductor optical amplifier in InGaAsP material system are reported for the first time. The MMI length of 113 μm is among the shortest reported. Average TIR mirror loss is about 1.1 dB per mirror. The material platform and fabrication process used are the same used for other active and passive devices except for a deep etch step. Hence, such resonators are easily integrated with other active and passive devices. A free spectral range of approximately 2 nm is observed near 1568 nm along with an on-off ratio of 14 dB, a full-width at half-maximum of about 0.3 nm, a finesse of more than 6, and a Q-factor of more than 4900.

Published in:

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

Date of Publication:

Sept. 2005

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