Abstract
A novel DFB fiber laser frequency tuning method involving introduction of a photo-thermal light resource into an optical fiber laser system is proposed. A theoretical analysis has been made and experiments have been done. The test results show that the static and dynamic frequency tuning range is about 112 MHz/100 mA and the tuning rate is more than 2 kHz. This method gives a simple way of achieving both relatively high dynamic tuning range and high tuning speed.
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