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1. 发明授权

US5799024A Generation of high power optical pulses using flared mode-locked semiconductor lasers and optical amplifiers 失效
标题翻译：使用喇叭形锁模半导体激光器和光放大器生成高功率光脉冲
公开(公告)号：US5799024A
公开(公告)日：1998-08-25
申请号：US772129
申请日：1996-12-19
申请人： John E. Bowers , Alan Mar , Roger J. Helkey , Judy Karin
发明人： John E. Bowers , Alan Mar , Roger J. Helkey , Judy Karin
IPC分类号： H01S5/026 , H01S5/06 , H01S5/065 , H01S5/10 , H01S5/14 , H01S5/50 , H01S3/113
CPC分类号： H01S5/14 , H01S5/065 , H01S5/50 , H01S5/026 , H01S5/0601 , H01S5/0609 , H01S5/1064
摘要： The mode-locked laser with improved pulse power output can be realized by combining an optical oscillator with a flared CW or modulated gain amplifier. An optical filter or isolator may be disposed between the oscillator and amplifier to avoid feedback of spontaneous noise. A two-segment laser is devised by providing a flared gain section between a modulated gain section and an absorber section within the integrated semiconductor laser. The flared section may taper from a larger modulated gain section to a smaller cross section absorber section or vice versa. Various combinations of absorber sections coupled to modulated gain sections by CW gain or passive flared gain sections may be combined with various arrangements of reflectors and tapered CW gain amplifiers are cascades of such amplifiers and modulated gain pairs. A saturable absorber may be used in a two-segment laser in which the absorber is bleachable and has a characteristic temperature which is increased during short time periods so that a passive gain is realized by the return pulse traveling through the saturable absorber provided that the returning pulse is timed to coincide with the temporal gain realized in the absorber.
摘要翻译：具有改善的脉冲功率输出的锁模激光器可以通过将光学振荡器与扩展的CW或调制增益放大器组合来实现。滤光器或隔离器可以设置在振荡器和放大器之间以避免自发噪声的反馈。通过在集成半导体激光器内的调制增益部分和吸收体部分之间提供扩张增益部分来设计双段激光器。扩口部分可以从较大的调制增益部分逐渐变细到较小的横截面吸收体部分，反之亦然。通过CW增益或被动扩张增益部分耦合到调制增益部分的吸收部分的各种组合可以与反射器的各种布置组合，并且锥形CW增益放大器是这种放大器和调制增益对的级联。可饱和吸收器可以用在两段激光器中，其中吸收器是可漂白的并且具有在短时间段内增加的特征温度，使得通过可饱和吸收器行进的返回脉冲实现无源增益，只要返回脉冲定时与吸收器中实现的时间增益一致。

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