Fabrication and performance of an index-coupled DFB laser with sampled grating

An index-coupled DFB laser with a sampled grating has been designed and fabricated. The key concept of the approaches is to utilize the +1st-order reflection of the sampled grating for laser operation, and use a conventional holographic exposure combined with the usual photolithography to form the sampled grating. The typical threshold current of the sampled grating DFB laser is 25 mA, and the optical output is about 10 mW at the injected current of 100 mA. The lasing wavelength of the device is 1.5314 mu m, which is the +1st-order peak of the sampled grating.

National Natural Science Foundation of China 90401025 607360366070600960777021National 973 Program of China 2006CB604901 2006CB604902 National 863 project 2006AA01Z256 2007AA03Z419 2007AA03Z417 The authors would like to thank Wang Bao-jun, Zhou Fan, Pan Jiao-qing, Shu Hui-yun for their experimental help, and Zhao Ling-juan, Wang Lu-feng, Bian Jing, An Xin for their support on the device test.This work is supported by the National Natural Science Foundation of China (grant nos 90401025, 60736036, 60706009, 60777021), the National 973 Program of China (grant nos 2006CB604901, 2006CB604902) and the National 863 project (grant nos 2006AA01Z256, 2007AA03Z419, 2007AA03Z417).