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公开(公告)号：US5898716A
公开(公告)日：1999-04-27
申请号：US934810
申请日：1997-09-22
申请人： Joon Tae Ahn , Hack Kyu Lee , Kyong Hon Kim
发明人： Joon Tae Ahn , Hack Kyu Lee , Kyong Hon Kim
CPC分类号： H01S3/06791 , H01S3/06712 , H01S3/082 , H01S3/105 , H01S3/1112 , H01S3/1608
摘要： A laser structure for obtaining an optical pulse of a very short duration by using the benefit of a passive mode locking and for improving a repetition rate of an output optical pulse was described. In general, a passively mode-locked laser generates a short optical pulse than a active mode locked laser does, while it has difficulties in increasing the repetition rate of the output optical pulse because the repetition rate of the passively mode-locked laser is determined by the length of the resonator. In accordance with the present invention, a delayed optical path is added to the linear loop of a conventional figure-8 optical fiber laser. The propagation time difference .DELTA.T between the delayed optical path and undelayed short optical path is adjusted to a divisor of the round trip time, T, of the original resonator by properly adjusting the length of the delayed optical path. Thus, the repetition rate of the output optical pulse of the mode locked laser can be increased from 1/T Hz to 1/.DELTA.T Hz. The optical fiber laser which can fully exploit the advantages of the passive mode locking and improve the repetition rate of the output optical pulse in accordance with the present invention can be applied to a wide range of applications including an optical communication and an ultra high speed analysis of optical phenomena.
摘要翻译： 描述了通过利用被动模式锁定和改善输出光脉冲的重复率来获得非常短持续时间的光脉冲的激光结构。 通常，被动锁模激光器产生比有源模式锁定激光器短的光脉冲，而由于被动锁模激光器的重复频率由被动锁模激光器的重复频率确定，所以难以增加输出光脉冲的重复率 谐振器的长度。 根据本发明，将延迟的光路添加到常规的图8的光纤激光器的线性环路中。 延迟光路和未延迟的短光路之间的传播时间差DELTA T通过适当地调节延迟光路的长度来调整到原始谐振器的往返时间T的除数。 因此，锁模激光器的输出光脉冲的重复率可以从1 / T Hz增加到1 / DELTA T Hz。 可以充分利用被动模式锁定的优点并提高根据本发明的输出光脉冲的重复率的光纤激光器可以应用于广泛的应用，包括光通信和超高速分析 的光学现象。
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