摘要
实验研究了基于掺Yb多芯大模场面积光子晶体光纤的全正色散锁模激光器.增益光纤的18个纤芯呈六角阵列排布,等效的模场直径约为52μm.激光器基于σ腔结构,腔内没有色散补偿元件,通过半导体可饱和吸收镜实现锁模的自启动.实验获得了平均功率为3.3W,脉冲宽度为4.92ps,重复频率为44.68MHz的锁模脉冲输出,对应的单脉冲能量为74nJ,脉冲经腔外光栅对压缩为780fs.
A mode locked fiber laser based on Yb-doped large mode area photonic crystal fiber operating in the all-normal dispersion regime is experimentally studied.The eighteen cores of the gain fiber are arranged in array-type geometry with an equivalent mode diameter of about 52 μm.A sigma laser cavity is used without using any elements for dispersion compensation.Reliable self-starting mode-locking is achieved using a fast semiconductor saturable absorber mirror.The laser directly produces 4.92 ps chirped pulses at a 44.68 MHz repetition rate for an average power of 3.3 W corresponding to a pulse energy of 74 nJ.The pulses are compressed to 780 fs with a grating pair outside the cavity.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第6期335-339,共5页
Acta Physica Sinica
基金
国家重点基础研究发展计划(批准号:2010CB327604,2011CB808101)
国家自然科学基金(批准号:60838004,61078028)
教育部科学技术研究计划重点项目(批准号:108032),教育部新世纪优秀人才支持计划(批准号:NCET-07-0597)资助的课题
全国优秀博士学位论文作者专项基金(批准号:2007B34)
supported the State Key Development Program for Basic Research of China (Grant Nos. 2010CB327604,2011CB808101)
the National Natural Science Foundation of China (Grant Nos. 60838004,61078028)
the Key Program of Science and Technology Research of Ministry of Education of China (Grant No. 108032 ),the Program for New Century Excellent Talents in Universities of Ministry of Education of China (Grant No. NCET-07-0597)
the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No.2007B34)
关键词
光子晶体光纤
多芯
光纤激光器
全正色散
photonic crystal fiber
multi-core
fiber laser
all-normal dispersion
