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1. 发明授权

US5930435A Optical filter device 失效
标题翻译：光滤波器
公开(公告)号：US5930435A
公开(公告)日：1999-07-27
申请号：US737985
申请日：1997-05-01
申请人： Richard I. Laming , Wei-Hung Loh , David N. Payne , Michael N. Zervas
发明人： Richard I. Laming , Wei-Hung Loh , David N. Payne , Michael N. Zervas
IPC分类号： G02B6/28 , G02F1/35 , H01S3/067 , H01S3/098 , H01S5/14 , G02B6/02
CPC分类号： H01S3/06708 , G02F1/3523 , H01S5/146 , G02B2006/2839 , G02F2201/02 , G02F2202/06 , G02F2203/055 , H01S3/06737 , H01S3/0675 , H01S3/06754 , H01S3/08022 , H01S3/08027 , H01S5/141
摘要： Passive, self-adjusting and tracking optical wavelength filters are described. The filters are absorptive and can be of either transmissive or reflective type. The filters comprise an unpumped doped optical waveguide configured so that signals of different wavelength are spatially decoupled to some extent. The self-adjustment of the filter centre wavelength is achieved by the combined effects of the power-dependent saturable absorption, provided by an appropriate dopant, and partial longitudinal hole burning provided by the spatial decoupling of the different wavelengths. External cavity lasers using this type of filter in the external cavity are also described. This external cavity configuration can provide stable single frequency operation of, for example, a semiconductor laser. By using a saturable absorber for the external cavity (e.g. an erbium doped fibre), longitudinal mode-hopping can be suppressed, ensuring single frequency operation.
摘要翻译： PCT No.PCT / GB95 / 01141 Sec。 371日期1997年5月1日 102（e）日期1997年5月1日PCT提交1995年5月19日PCT公布。公开号WO95 / 32451 1995年11月30日，描述了无源自调整和跟踪光波长滤波器。过滤器是吸收性的，并且可以是透射型或反射型。滤波器包括一个未使用的掺杂光波导，其被配置成使得不同波长的信号在一定程度上在空间上解耦。通过由适当的掺杂剂提供的功率依赖的可饱和吸收和通过不同波长的空间去耦提供的部分纵向孔燃烧的组合效应来实现滤波器中心波长的自调节。还描述了在外腔中使用这种类型的滤波器的外腔激光器。该外部空腔配置可以提供例如半导体激光器的稳定的单频操作。通过使用用于外部空腔的可饱和吸收体（例如掺铒光纤），可以抑制纵向跳跃，确保单频操作。

2. 发明授权

US5375010A Optical amplifier 失效
标题翻译：光放大器
公开(公告)号：US5375010A
公开(公告)日：1994-12-20
申请号：US012043
申请日：1993-02-01
申请人： Michael N. Zervas , Richard I. Laming , David N. Payne
发明人： Michael N. Zervas , Richard I. Laming , David N. Payne
IPC分类号： H01S3/00 , H01S3/067 , H01S3/16 , G02B6/00 , H01S3/06 , H01S3/094
CPC分类号： H01S3/06758 , H01S2301/02 , H01S3/0064 , H01S3/1608 , Y10S372/703
摘要： An optical amplifier comprises first (22) and second (24) lengths of erbium-doped fibre connected in series via an isolator 20 which reduces the transmission of backward-travelling ASE from the second length to the first length when pump power in inputted in to the first length.
摘要翻译：光放大器包括通过隔离器20串联连接的第一（22）和第二（24）长度的掺铒光纤，当隔离器20输入的泵浦功率减小了反向运行的ASE从第二长度到第一长度的传输第一个长度。

3. 发明授权

US5579153A Optical power limiting amplifier 失效
标题翻译：光功率限制放大器
公开(公告)号：US5579153A
公开(公告)日：1996-11-26
申请号：US52244
申请日：1993-04-22
申请人： Richard I. Laming , Michael N. Zervas
发明人： Richard I. Laming , Michael N. Zervas
IPC分类号： H01S3/067 , H01C3/06 , G02B6/26
CPC分类号： H01S3/06758 , H01S3/06779
摘要： In an optical amplifier, comprising a rare earth doped optical waveguide, in which signals at signal wavelength and pump power at pump wavelength are coupled together, a differential loss inducing means is located in a predetermined position along the length of the waveguide, causing a loss for the signal greater by a predetermined loss amount than the loss for the pump wavelength, said predetermined loss amount and said predetermined loss position being chosen in a mutual relationship to cause an amplification of lower power input signals, in said signal input power range, greater than the amplification of higher power input signals in said range, by an amount causing a substantially constant output power in a dynamic range of input signals greater than 15 dB.
摘要翻译：在包括稀土掺杂光波导的光放大器中，信号波长的信号和泵浦波长的泵浦功率耦合在一起，差分损耗感应装置位于沿波导长度的预定位置，导致损耗为了使信号大于泵浦波长的损耗的预定损耗量，所述预定损耗量和所述预定损耗位置以相互关系选择，以使所述信号输入功率范围内较低功率输入信号的放大更大比在所述范围内的较高功率输入信号的放大乘以在大于15dB的输入信号的动态范围内导致基本上恒定的输出功率的量。

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