科研之友
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摘要
We demonstrate a Q-switched thulium-doped fibre laser operating at approximately 1935nm wavelength using anatase titanium(IV) oxide (TiO2) embedded in polyvinyl alcohol as the passive newly saturable absorber (SA). The film has absorption loss of 3.5dB and modulation depth of 33%. It is sandwiched between two fibre ferrules in a ring laser cavity to produce self-started pulse train with a repetition rate that is tuned from 30.12 to 36.96kHz as the 1552-nm pump power is increased from 289 to 485mW. At maximum pump power, the laser produced a Q-switching pulse train with pulse duration, output power, pulse energy and peak power of 1.91s, 11mW, 0.3J and 146mW, respectively. These results show that the TiO2 is a new potential SA material for pulsed laser applications.
- 出版日期2017
