Abstract

We propose and demonstrate a locally deformed-ring (LDR) hybrid microlaser to realize stable unidirectional emission from a silicon waveguide. The coupled modes eliminate the competition between clockwise (CW) and counter-clockwise (CCW) modes, and the highly unidirectional characteristics are achieved with an enhanced mode quality factor based on a locally deformed notch in the LDR resonator. Using a divinylsiloxane-benzocyclobutene bonding technique, a LDR hybrid microlaser is fabricated vertically coupled to a silicon waveguide with a radius of 20 μm, a ring width of 4 μm and a notch width of 500 nm. The threshold current is 7 mA, and single-mode lasing is achieved with the side-mode suppression ratio of 27 dB. Nearly total unidirectional output from the CCW direction of a Si waveguide is demonstrated with a unidirectional ratio of 0.053.

© 2016 Optical Society of America

Hybrid spiral-ring microlaser vertically coupled to silicon waveguide for stable and unidirectional output

Shao-Shuai Sui, Ming-Ying Tang, Yue-De Yang, Jin-Long Xiao, Yun Du, and Yong-Zhen Huang
Opt. Lett. 40(21) 4995-4998 (2015)

Single-mode unidirectional-emission circular-side hexagonal resonator microlasers

Zhi-Xiong Xiao, Yong-Zhen Huang, Yue-De Yang, Jin-Long Xiao, and Xiu-Wen Ma
Opt. Lett. 42(7) 1309-1312 (2017)

Hetero-core III-V/Si microlaser

Chee-Wei Lee, Doris Keh-Ting Ng, Ai Ling Tan, and Qian Wang
Opt. Lett. 41(13) 3149-3152 (2016)

Unidirectional hybrid silicon ring laser with an intracavity S-bend

Wesley D. Sacher, Michael L. Davenport, Martijn J. R. Heck, Jared C. Mikkelsen, Joyce K. S. Poon, and John E. Bowers
Opt. Express 23(20) 26369-26376 (2015)

Square-wave oscillations in a semiconductor ring laser subject to counter-directional delayed mutual feedback

Song-Sui Li, Xiao-Zhou Li, Jun-Ping Zhuang, Gabor Mezosi, Marc Sorel, and Sze-Chun Chan
Opt. Lett. 41(4) 812-815 (2016)