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81.发明申请公开(公告)号：US20020196426A1
公开(公告)日：2002-12-26
申请号：US10075864
申请日：2002-02-13
发明人： Ralf Stolte
IPC分类号： G01N021/00
CPC分类号： G01M11/337 , G01M11/33 , G01M11/336
摘要： For measuring a polarization dependent parameter of an optical device under test nullDUTnull(30), an optical source (10) provides an optical stimulus signal at variable wavelengths, and a polarization translator (20) translates the polarization state of the optical stimulus signal applied from the optical source (10) at its input to its output in a deterministic way dependent on the wavelength of the optical stimulus signal. A receiving unit (40) receives an optical response signal from the DUT (30) to the applied optical stimulus signal, and an analyzing unit (60) analyzes received optical response signals for different wavelengths for determining values of the polarization dependent parameter of the DUT (30).
摘要翻译： 为了测量正在测试的光学器件-DUT-（30）的偏振相关参数，光源（10）提供可变波长的光学激励信号，偏振转换器（20）将光学刺激信号的偏振状态 从光源（10）在其输入处以取决于光刺激信号的波长的确定性方式施加到其输出。 接收单元（40）从DUT（30）接收到所应用的光激励信号的光响应信号，分析单元（60）分析用于不同波长的接收光响应信号，以确定DUT的偏振相关参数的值 （30）。
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公开(公告)号：US06449033B2
公开(公告)日：2002-09-10
申请号：US09299782
申请日：1999-04-26
IPC分类号： G01N2100
CPC分类号： G01M11/3181 , G01M11/337
摘要： An apparatus for measuring polarization dependent loss is disclosed featuring several fiber optic couplers combined in tandem and oriented such that the PDL noise of the measurement system is reduced to a negligible level. By matching the PDLs of the couplers and vectorally subtracting opposite phases of polarization, the PDL of the measurement system is virtually eliminated. Thus, the PDL noise floor is lowered to near zero and the PDL of the optical device-under-test (DUT) can be accurately measured. The system is relatively inexpensive to implement and offers needed versatility because it measures the PDL of optical devices that operate in a reflection mode or in a forward transmission mode. Thus, it provides one PDL measurement solution for both types of devices.
摘要翻译： 公开了一种用于测量偏振相关损耗的装置，其特征在于将多个光纤耦合器串联组合并定向成使得测量系统的PDL噪声降至可忽略的水平。 通过匹配耦合器的PDL和矢量减去相反的极化相位，实际上消除了测量系统的PDL。 因此，PDL本底降低到接近零，并且可以精确地测量被测光学器件（DUT）的PDL。 该系统实现相对便宜并且提供所需的多功能性，因为它测量以反射模式或正向传输模式操作的光学装置的PDL。 因此，它为两种类型的设备提供了一个PDL测量解决方案。
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83.发明授权
公开(公告)号：US6069697A
公开(公告)日：2000-05-30
申请号：US62484
申请日：1998-04-17
CPC分类号： G01M11/337
摘要： A processing unit reads out, from a memory, wavelength setting data corresponding to wavelength information from a key input section, and outputs a wavelength setting command corresponding to the wavelength setting data to a tunable-wavelength control section and a spectral wavelength control section. The tunable-wavelength control section controls a tunable-wavelength light source section to output a laser beam having a wavelength corresponding to the wavelength setting data. The spectral wavelength control section controls a spectroscope section to perform spectroscopy of the light having the wavelength corresponding to the wavelength setting data and output the resultant light. Output light from the tunable-wavelength light source section whose wavelength has been set is input to an object to be measured. Light passing through the object is input to the spectroscope section. The spectroscope section performs spectroscopy of only the light having the wavelength corresponding to the wavelength setting data. A light-receiving section receives the spectral light and photoelectrically converts it. The resultant light is converted into digital data by an A/D conversion section to be input as level data to a processing unit. The processing unit obtains a light-reception level on the basis of the digital level data.
摘要翻译： 处理单元从存储器读出与键输入部分相对应的波长信息的波长设置数据，并将与波长设置数据相对应的波长设置命令输出到可调谐波长控制部分和光谱波长控制部分。 可调波长控制部分控制可调谐波长光源部分，以输出具有对应于波长设置数据的波长的激光束。 光谱波长控制部分控制分光镜部分对具有与波长设置数据相对应的波长的光进行光谱分析并输出所得到的光。 将波长设定的可调谐波长光源部的输出光输入到被测量物体。 通过物体的光被输入到分光器部分。 分光器部分仅对具有与波长设置数据相对应的波长的光进行光谱分析。 光接收部分接收光谱光并对其进行光电转换。 所得到的光由A / D转换部分转换为数字数据，作为电平数据输入到处理单元。 处理单元基于数字电平数据获得光接收电平。
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