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1. 发明授权

US06711198B1 Light source device for laser beam printer 有权
标题翻译：激光束打印机光源装置
公开(公告)号：US06711198B1
公开(公告)日：2004-03-23
申请号：US09549552
申请日：2000-04-14
申请人： Jun Ichihara , Hisayoshi Kitajima , Tetsuhiro Tanabe , Ken Nakahara , Haruo Tanaka
发明人： Jun Ichihara , Hisayoshi Kitajima , Tetsuhiro Tanabe , Ken Nakahara , Haruo Tanaka
IPC分类号： H01S500
CPC分类号： H01S5/2231 , H01S5/06216 , H01S5/221 , H01S5/2219
摘要： A light source device for a laser beam printer in which a semiconductor laser is driven with a pulse current having a minimum pulse width at the ON time on the order of milliseconds or less is provided, wherein the semiconductor laser is formed so that either the rate of change at the rise portion of the pulse current becomes ±8% or less or the semiconductor laser is excited in a multiple mode in the vicinity of the threshold value of the oscillation, and the semiconductor laser oscillates in a single mode at a current separated from the threshold value, by adjusting of at least one of the width w of a stripe groove (7a) of the current block layer, the composition of clad layers (5), the distance d between the current block layer (7) and the active layer (4), the composition of the current block layer (7) and the formation of a light absorption layer into the current block layer (7). As a consequence, in the case where the light source device for the laser beam printer is driven with a short drive pulse on the order of several hundred micro seconds, the light source device becomes such that a transient phenomenon is not generated at the time of the rise of the pulse and a stable light output can be obtained.
摘要翻译：提供了一种激光束打印机的光源装置，其中半导体激光器以在几毫秒或更小的导通时间具有最小脉冲宽度的脉冲电流驱动，其中半导体激光器形成为使得速率在脉冲电流的上升部分的变化量为±8％以下，或者半导体激光器在振荡阈值附近的多模式下被激发，半导体激光器以单一模式以分流的方式振荡从阈值，通过调整当前阻挡层的条纹槽（7a）的宽度w，包层（5）的组成中的至少一个，当前阻挡层（7）和有源层（4），当前阻挡层（7）的组成和在当前阻挡层（7）中形成光吸收层。结果，在激光束打印机的光源装置以数百微秒的短驱动脉冲驱动的情况下，光源装置变为使得在不能产生瞬时现象的情况下可以获得脉冲的上升和稳定的光输出。

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