Cladding pumped optical fiber gain devices
    4.
    发明授权
    Cladding pumped optical fiber gain devices 有权
    包层泵浦光纤增益器件

    公开(公告)号:US06970624B2

    公开(公告)日:2005-11-29

    申请号:US10461133

    申请日:2003-06-13

    摘要: The specification describes optical fiber gain devices, such as lasers and amplifiers, wherein losses due to a large step transition between an input section and a gain section are reduced by inserting an adiabatic transformer between the input section and the gain section. In the preferred case the adiabatic transformer comprises a GRadient INdex (GRIN) lens. The lens serves as an adiabatic beam expander (reducer) to controllably increase (reduce) the modefield of the beam as it travels through the step transition.

    摘要翻译: 本说明书描述了诸如激光器和放大器之类的光纤增益器件,其中通过在输入部分和增益部分之间插入绝热变压器来减小由于输入部分和增益部分之间的大的阶跃转换引起的损耗。 在优选情况下,绝热变压器包括GRadient INdex(GRIN)透镜。 该透镜用作绝热的光束扩展器(减速器),以在光束行进通过阶跃转变时可控地增加(减小)光束的模场。

    Optical attenuator
    6.
    发明授权
    Optical attenuator 失效
    光衰减器

    公开(公告)号:US5572618A

    公开(公告)日:1996-11-05

    申请号:US274597

    申请日:1994-07-13

    CPC分类号: G02B6/266 G02B6/02 G02B6/243

    摘要: A passive optical attenuating device comprises an optical waveguide adapted to receive optical radiation and absorb, along its length, at least 0.2 dB/m of the optical radiation. The waveguide section may be coupled to a low-loss optical fiber so as to receive an optical signal to be attenuated therefrom. In accordance with one aspect of the invention, at least one region of the waveguide is doped with a transition metal to achieve a pre-selected absorptivity per unit length so that a controlled degree of attenuation can be achieved.

    摘要翻译: 无源光衰减装置包括适于接收光辐射并沿其长度吸收至少0.2dB / m的光辐射的光波导。 波导部分可以耦合到低损耗光纤,以便接收要从其衰减的光信号。 根据本发明的一个方面,波导的至少一个区域掺杂有过渡金属以实现每单位长度的预选吸收率,从而可以实现受控程度的衰减。

    Method of controlling longitudinal properties of optical fiber
    8.
    发明授权
    Method of controlling longitudinal properties of optical fiber 有权
    控制光纤纵向特性的方法

    公开(公告)号:US08591777B2

    公开(公告)日:2013-11-26

    申请号:US12316740

    申请日:2008-12-15

    IPC分类号: B29D11/00

    CPC分类号: G02B6/02247 C03C25/62

    摘要: A method of creating optical fiber to exhibit predetermined length-dependent characteristics (e.g., chromatic dispersion, polarization mode dispersion, cutoff wavelength, birefringence) includes the steps of: characterizing the fiber's selected characteristic(s) as a function of length; and performing a “treatment” which modifies the refractive index over the given length to adjust the defined parameter to fall within a defined tolerance window. These steps may be repeated one or more times until the measure of the parameter falls with the defined tolerance limits. The treatment process may include, for example, a low energy actinic radiation exposure, anneal, mechanical strain, DC voltage, plasma application, etc. Indeed, if the treatment process is repeated, a different technique may be used to adjust the refractive index (“different” processes include, for example, modifying the strength/time of a UV exposure, temperatures for annealing, etc.).

    摘要翻译: 产生光纤以呈现预定长度相关特性(例如,色散,偏振模色散,截止波长,双折射)的方法包括以下步骤:将光纤的选定特性表征为长度的函数; 并且执行修改在给定长度上的折射率的“处理”,以将限定的参数调整到落入限定的公差窗内。 这些步骤可以重复一次或多次,直到参数的测量值与定义的公差极限一致。 处理过程可以包括例如低能量光化辐射暴露,退火,机械应变,DC电压,等离子体施加等。实际上,如果重复处理过程,则可以使用不同的技术来调节折射率( “不同”方法包括例如改变UV暴露的强度/时间,退火温度等)。