摘要
The temperature characteristics of monolithically integrated wavelength-selectable light sources are experimentally investigated.The wavelength-selectable light sources consist of four distributed feedback(DFB)lasers,a multimode interferometer coupler,and a semiconductor optical amplifier.The oscillating wavelength of the DFB laser could be modulated by adjusting the device operating temperature.A wavelength range covering over 8.0 nm is obtained with stable single-mode operation by selecting the appropriate laser and chip temperature.The thermal crosstalk caused by the lateral heat spreading between lasers operating simultaneously is evaluated by oscillating-wavelength shift.The thermal crosstalk approximately decreases exponentially as the increasing distance between lasers.
基金
Supported by the National High-Technology Research and Development Program of China under Grant Nos 2011AA010303 and 2012AA012203
the National Basic Research Program of China under Grant No 2011CB301702
the National Natural Science Foundation of China under Grant Nos 61021003 and 61090392.
