Direct intensity modulation of a rectangular ring laser with bidirectional lasing characteristics期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Direct intensity modulation of a rectangular ring laser with bidirectional lasing characteristics

Authors:	Doo Gun Kim Tae-Kyeong Lee Hyun Chul Ki Hwe Jong Kim Nadir Dagli

Affiliation:	^a Photonics Fusion System Research Center, Korea Photonics Technology Institute, Gwangju 500-460, Republic of Korea ^b School of Electronic Engineering, Soongsil University, Dongjak-ku, Seoul 156-743, Republic of Korea ^c Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA 93160, USA ^d School of Electrical and Electronics Engineering, Chung-Ang University, 221 Heuksuk-Dong, Dongjak-ku, Seoul 156-756, Republic of Korea

Abstract:	The direct intensity modulation of a three-guide coupled rectangular ring laser having bidirectional lasing characteristics is reported for the first time. The rectangular laser cavity consists of four low loss total internal reflection mirrors and an output coupler made out of three passive coupled waveguides. The laser is fabricated using a total cavity length of 580 μm with active section lengths of 250 μm. For both the clockwise and counterclockwise circulating directions, a lasing threshold of around 38 mA is obtained at room temperature under continuous wave operation. A maximum 3-dB modulation bandwidth of approximately 3.2 GHz is observed in both circulating directions.

Keywords:	Rectangular laser Ring laser Bidirectional laser Direct modulation
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