摘要
对LD抽运全光纤声光调Q铒镱共掺杂双包层光纤激光器进行了实验研究。采用两个半导体激光器作为抽运源,利用带尾纤声光调制器作为Q开关,以铒镱共掺杂双包层光纤作为增益介质,以光纤布拉格光栅作为反馈器件,在线形腔结构中,获得了波长1549.47nm,谱线半峰全宽0.499nm的稳定激光脉冲序列。脉冲重复频率1～15kHz可调,在重复频率1kHz时,得到最大单脉冲能量209μJ,平均输出功率209mW,脉冲宽度约100ns,脉冲峰值功率2kW。在不同重复频率下,测量了单脉冲能量和平均功率随入纤功率的变化。
Rare-earth doped fibers based on silica materials have been the subject of a tremendous research effort over a few decades for high power laser source applications. The main advantage of using a silica host is that it provides low propagation loss, high gain, large bandwidth and high chemical durability. It has been predicted that the fiber lasers have many advantages including very high conversion efficiency, immunity from thermal lensing effect due to large ratio of surface area to volume, no need of beam steering, simplicity of optical cavity construction, excellent beam quality, small volume and weight, low cost, and inherently fiber-coupled output. Thus fiber laser is now competing with conventional bulk solid-state lasers in applications such as micro-machining, welding and other material processing. It has been predicted that the fiber lasers will show good application prospect in the field of communication, printing, marking, medicine, and so on.
A laser diode pumped all-fiber acousto-optic Q-switched Er/Yb co-doped double-cladding fiber laser was reported. The technical difficulties were resolved, including full fiber configuration, pump coupling, and enhance output power ulteriorly. Two laser diodes were employed as the pumping source, acousto-optical modulation with fiber was employed as Q-switched, Er^3＋/Yb^3＋ co-doped double-cladding fiber was employed as gain medium, fiber Bragg grating was employed as feedback device, in linear cavity the stable pulse train with wavelength of 1 549.47 nm and spectrum bandwidth of 0. 499 nm was obtained. The repetition rate is adjustable from 1 kHz to 15 kHz. Single pulse energy up to 209 μJ, average output power of 209 mW, pulse width of 100 ns and peak power of 2 kW were obtained at the repetition rate of 1 kHz. Single pulse energy was calculated at repetition rate of 1 kHz theoretically. Single pulse energy and average output power were measured at different input pump power. At low pump power, pulse train with twice and thrice modulation period were observed.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2008年第6期1018-1022,共5页
Chinese Journal of Luminescence
基金
吉林省自然科学基金资助项目(K04M092)
关键词
光纤激光器
声光调Q
铒镱共掺杂光纤
fiber lasers
acousto-optic Q-switched
erbium/ytterbium co-doped fiber
