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Polarizationextinction ratioThorlabs

A good way to measure strehl is through MTF. Strehl is the ratio of the integral of whatever your MTF is to the integral of the diffraction ...

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Polarizationextinction ratiomeasurement

We clarify the definition of the polarization extinction ratio—also called polarization cross talk—of fiber-based devices. Its strong wavelength dependence, even for simple devices such as a single-fiber patchcord, is highlighted. Thus white sources may not be used for most measurements. We also explain the weakness of measurements with a rotating polarizer and a monochromatic source. Only a polarimeter may be used if accuracy is required. We report measurements of connections (including two connectors and one mating sleeve) and show the importance of the mating sleeve in the result. Finally, we define the validity domain of the standardized method, which uses both a white source and a rotating polarizer.

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Haoliang Zhang, Jun Yang, Chuang Li, Zhangjun Yu, Zhe Yang, Yonggui Yuan, Feng Peng, Hanyang Li, Changbo Hou, Jianzhong Zhang, Libo Yuan, Jianming Xu, Chao Zhang, and Quanfu Yu Appl. Opt. 56(24) 6873-6880 (2017)

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... aberration correction and adaptive ultrasound imaging with a time reversal virtual array | Strong acoustical aberrations such as induced by multi-mode ...

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Note: A ±5V power supply, such as the Hamamatsu C10709 (#84-956), is required for operating the H12402 and H12403 series Micro PMT Modules. PMT Modules are extremely light sensitive and exposure to ambient room light during operation will permanently damage the module. Housings are also fragile and will be permanently damaged if dropped. Damages due to above reasons are not covered under warranty or return policies.

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Daniel A. Nolan, George E. Berkey, Ming-Jun Li, Xin Chen, William A. Wood, and Luis A. Zenteno Opt. Lett. 29(16) 1855-1857 (2004)

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Polarisation extinction ratioformula

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Polarizationextinction ratioformula

We clarify the definition of the polarization extinction ratio—also called polarization cross talk—of fiber-based devices. Its strong wavelength dependence, even for simple devices such as a single-fiber patchcord, is highlighted. Thus white sources may not be used for most measurements. We also explain the weakness of measurements with a rotating polarizer and a monochromatic source. Only a polarimeter may be used if accuracy is required. We report measurements of connections (including two connectors and one mating sleeve) and show the importance of the mating sleeve in the result. Finally, we define the validity domain of the standardized method, which uses both a white source and a rotating polarizer.

A collimated beam of light means that the wavefront is plane parallel. · This is a geometrical representation of collimated light. · Notice that ...

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