CAJ | 학술논문

研究了亚纳秒脉冲抽运光子晶体光纤产生高功率超连续谱的机理.采用掺镱锁模光纤激光器产生的脉宽570 ps光脉冲,抽运1.8 m光子晶体光纤,得到了平均功率为1.15 W、光谱覆盖范围为750 nm的超连续谱.通过实验和模拟结果的对比和分析,证实了亚纳秒脉冲抽运1.8 mPCF产生超连续谱时,调制不稳定性效应起了重要作用.在研究了不同抽运功率下输出的超连续谱变化后,发现随着抽运功率的提高,输出功率也更高且超连续谱覆盖波段也更宽,在瓦级输出功率下依然未达到饱和展宽状态,还有进一步提高功率和展宽光谱的空间.
연구료아납초맥충추운광자정체광섬산생고공솔초련속보적궤리.채용참의쇄모광섬격광기산생적맥관570 ps광맥충,추운1.8 m광자정체광섬,득도료평균공솔위1.15 W、광보복개범위위750 nm적초련속보.통과실험화모의결과적대비화분석,증실료아납초맥충추운1.8 mPCF산생초련속보시,조제불은정성효응기료중요작용.재연구료불동추운공솔하수출적초련속보변화후,발현수착추운공솔적제고,수출공솔야경고차초련속보복개파단야경관,재와급수출공솔하의연미체도포화전관상태,환유진일보제고공솔화전관광보적공간.
To research the mechanism of high power supercontinuum generation by sub-nanosecond pulse pumping photonic crystal fiber (PCF),a 1.8 m PCF is pumped by 570 ps pulses from a Yb-doped mode-locked fiber laser,and it puts out SC (supercontinuum) with 1.15 W power and 750 nm spectral coverage.It is verified that when SC is generated by sub-nanosecond pulse pumping 1.8 m PCF,the modulation instability (MI) takes an important part in expanding spectrum via comparing and analyzing the experiment with simulation.After researching the change of SC under different pump power,it is found that the power of SC increases and the spectral coverage expands with the pump power.Under watt power output,it still does not reach saturated section,and be probable to get higher power and broader spectrum.