Generation of tunable dual - wavelength optical short pulse using a self - seeding scheme with enhanced sidemode suppression ratio 以自激注入鎖定方式生成邊模抑制比高的可調(diào)諧雙波長(zhǎng)超短光脈沖
The side mode suppression ratio about 39db is realized . 5 . a tunable cladding - pumped yb3 + - doped fiber laser system is reported 55 m可調(diào)諧光纖光柵外腔半導(dǎo)體激光器,得到調(diào)諧范圍為7nm 、邊模抑制比達(dá)39db的激光輸出。
( 3 ) with the increase of the injected current , the lasing wavelength of fgesl appears fluctuation , the side mode suppression ratio ( smsr ) increases accompanied by an oscillation , and the p - i curve distorts slightly Fgesl的激射波長(zhǎng)隨ld的注入電流的增大而發(fā)生波動(dòng);邊模抑制比( smsr )隨注入電流的增大總體上呈現(xiàn)上升趨勢(shì),但其變化過(guò)程并不平滑而是有較大的波動(dòng); fgesl的p一i曲線有微小的扭曲。
As a result , a theoretical model of fiber grating external cavity semiconductor lasers including the reflectivity distribution of fiber grating has been presented in this paper . based on the model , the laser characteristics such as the threshold current , mode suppression ratio etc . have been specified 利用該模型對(duì)光纖光柵外腔半導(dǎo)體激光器的閾值電流、模式抑制比等進(jìn)行了研究,得到了一些新的結(jié)論,并對(duì)此結(jié)論作出了合理的解釋。