Newport's VA-CB series of broadband variable beam splitters provide continuous beam splitting or attenuation over a series of broad wavelength ranges. The VA-CB series is designed to provide high contrast beam splitting of linearly polarized light. The motorized version can be used in open- or closed-loop operation. 
The VA-CB series is based on zero-order half-waveplates and polarizing cube beam splitters. These attenuators are designed to handle average powers up to 500 Watts for wavelength ranges of 400 – 700 nm, 700 – 1000 nm, 900 - 1300 nm or 1200 – 1600 nm.
The optics and high-precision opto-mechanics are incorporated into a compact housing, flexibly designed for post mounting at varying optical axis heights. P-polarized light is transmitted with minimal loss collinear to the input beam path while S-polarized light is reflected 90º. A removeable beam dump is included on the reflected beam port, transforming the VA-CB into a variable attenuator for the transmitted beam. M-4 and 8-32 mounting threads are included on the opposite side and bottom of the housing. This allows for various polarized output options. 
The motorized versions of the VA-CB series come with a motorized rotary stage containing the half-waveplate. Software is included which allows the user to calibrate one port of the VA-CB at a single wavelength.

• 类型

  Motorized Variable Beam Splitter

• 衰减范围

  Tp > 90% average, Rs > 99.5% average

• 波长范围

  700 - 1000 nm

• 消光比

  Tp/Rs >500:1, 1000:1 average

• 损伤阈值

  500 W/cm2 CW, 2 J/cm2 with 8 nsec pulses at 1064 nm, typical

• 通光孔径

  10 mm  

• 
  

新港的VA-CB系列宽带可变分束器在一系列宽波长范围内提供连续的分束或衰减。VA-CB系列用于提供线性偏振光的高对比度光束分裂。电动版可用于开环或闭环操作。

VA-CB系列是基于零阶半波片和偏光立方光束分离器。这些衰减器的平均功率可达500瓦，波长范围为400 - 700 nm、700 - 1000 nm、900 - 1300 nm或1200 - 1600 nm。

光学和高精度光学力学结合到一个紧凑的外壳，灵活设计后安装在不同的光轴高度。P-polarized光传播以最小的损失共线的输入光束路径而S-polarized光反映90º。反射波束端口包括一个可拆卸的波束转储，将VA-CB转换为传输波束的可变衰减器。M-4和8-32安装螺纹包括在外壳的另一侧和底部。这允许各种极化输出选项。

VA-CB系列的电动版本带有一个装有半波板的电动旋转台。软件允许用户在一个波长校准VA-CB的一个端口。