Four-Channel 1.55-μm DFB Laser Array Monolithically Integrated with a 4×1 Multimode-Interference Combiner Based on Nanoimprint Lithography
CHEN Xin1, ZHAO Jian-Yi1,2**, ZHOU Ning2, HUANG Xiao-Dong2, LIU Wen1,3
1Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074 2Accelink Technologies Company, Ltd, Wuhan 430074 3Institute of Advanced Technology, University of Science and Technology of China, Hefei 230026
Abstract：A monolithically integrated four-channel λ/4 phase shift distributed feedback (DFB) laser array with a 4×1 multimode interference combiner is designed and fabricated using nanoimprint lithography. The threshold currents of the lasers are less than 10 mA, which are as good as a discrete DFB laser. Moreover, the side-mode suppression ratio is also better than 50 dB. The channel space is about 200 GHz for dense wavelength division multiplexing applications in an 1.55 μm system.
2014, Vol. 31 
