As a key component of all-optical switching network terminal technology, ultra-fast wavelength-tunable laser arrays are critical to the high integration and performance improvement of the entire optical switching system. In this article, the array of 2×8 matrix grating DFB laser arrays that we used are based on reconstruction equivalent chirp technology. The wavelength range is in the C-band. Based on this, we designed an excellent control circuit and a high-speed drive circuit for the needs of the laser array to provide the laser array with a drive current that can control the ultra-high-speed switching of channels. The final experimental results show that the channel spacing of the 16 channels of the laser array is 100G, In addition, the switching time of any two channels is less than 10 nanoseconds, and the wavelength selection time has nothing to do with the wavelength range. During the switching process, the centre wavelength drift of each channel is always within the channel wavelength error specified by WDM under the ITU-T standard.
Fast tunable lasers with switching time less than one microsecond are key components in high-speed optical switching networks. In this paper, we propose an effective method to achieve high wavelength switching speed by turning on/off individual lasers of a matrix-grating DFB laser array. The laser array consists of 16 DFB lasers, which are arranged as a 4-by-4 matrix. Besides, the REC technique is used to simplify the fabrication of the grating and precisely control the grating phase. 16 channels with 2.4-nm-spacing are obtained and the SMSRs of all the 16 channels are above 40 dB, indicating good single mode operation. A high-speed driving circuit is designed to supply stable direct current for the DFB laser array and to control the switching process. The experimental result shows that the switching time between 2 channels is less than 100 nanoseconds.
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