期刊
OPTICS COMMUNICATIONS
卷 352, 期 -, 页码 70-76出版社
ELSEVIER
DOI: 10.1016/j.optcom.2015.04.077
关键词
Semiconductor lasers; Distributed feedback lasers; Laser arrays
类别
资金
- National Natural Science Foundation of China [61306068, 61435014, 61090392]
- Nature Science Foundation of Jiangsu Province for the Youth [BK20130585, BK20140414]
- National 863 Project [SS2015AA012302]
The tunable distributed feedback (DFB) semiconductor lasers with cascaded configuration were designed and fabricated using equivalent phase shift (EPS) technique. 32-wavelength division multiplexing (WDM) channels with 50-GHz and 100-GHz wavelength spacing were experimentally demonstrated. In such a tunable laser, single mode operation can be ensured by introducing EPS and the wavelength tuning can be realized by cascaded sections with specific sampling periods combining with chip heating. The proposed approach has some advantages such as good single mode property, low fabrication cost and feasibility of monolithic integration. The experimental results show that the tuning range can be nearly up to 25 nm and the side mode suppression ratios (SMSRs) of most channels are above 40 dB. The proposed laser should be promising for cost-effective applications in WDM systems. (C) 2015 Elsevier B.V. All rights reserved.
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