Kim Doo Gun, Oh Geum-Yoon, Choi Woon-Kyung, Kim Hyo Jin, Kim Seon Hoon, Ki Hyun Chul, Kim Sang-Taek, Ko Hang Ju, Kim Tae Un, Yang Myoung Hak, Kim Hwe Jong, Yi Jong Chang, Chung Youngchul, Dagli Nadir, Choi Young-Wan
Microwave and Lightwave Telecommunications Lab., School of Electrical and Electronics Engineering, Chung-Ang University, Dongjak-ku, Seoul, 156-756, Korea.
Opt Express. 2008 Dec 8;16(25):21053-8. doi: 10.1364/oe.16.021053.
Novel triangular ring resonators combining extremely small multimode-interference (MMI) coupler, low loss total internal reflection (TIR) mirrors, and semiconductor optical amplifiers are reported for the first time. The MMI length of 90 microm is among the shortest reported. The incidence angle of the TIR mirror inside the resonator is 22 degrees. A free-spectral range of approximately 2 nm is observed near 1550 nm along with an on-off ratio of 17 dB. The triangular resonators with a sharp angle are very attractive components due to their promise of compact size and high levels of integration. Therefore, large numbers of resonators can be integrated on a chip to increase functionality in future optical wavelength division multiplexing system.
