Polarization Measurement and Analysis
Luna’s broad portfolio of advanced polarization test and measurement products can generate and control polarization, and measure and analyze all essential polarization related properties from optical materials, to components, to networks.
光学组件和系统可以对极化状态(SOP)敏感。例如,光信号可以根据其SOP衰减不同地衰减。这称为偏振依赖性损耗(PDL)。双折射光学元件将具有不同偏振的不同折射率,使光以略微不同的速度行进,导致差分组延迟(DGD)。在纤维中,具有沿其长度的变化的双折射部分,这种效果称为偏振 - 模式分散(PMD)。
State of polarization and Poincare Sphere Representation
The state of polarization of light is an important parameter of optical signals because it affects how the optical beam behaves when interacting with an optical medium or an optical element. Luna’s in-line polarimeter splits the passing light into four different beams without interrupting the optical signal as shown below:
Any SOP can be represented as a point on a sphere. This 3D representation of the state of polarization is referred to as Poincare Sphere representation. Luna’s polarimeter can display the real-time changes in polarization using PolaView as shown below:
Polarization Effects in Components and Networks
In fiber-optic communication systems, the presence of PDL and PMD from the fiber and optical components are sources of optical signal degradation that could result in incorrect data detection at the receiver. Therefore, wavelength-dependent measurements and characterization of polarization-related parameters are required for all the optics starting from transmitter, through the fiber network, and to the receiver.
Key Measurements for Optical Polarization Measurement
Luna solutions provide the advanced polarization related measurements for complete characterization of optical components including:
- State of Polarization (SOP)
- Degree of Polarization (DOP)
- Insertion loss (IL)
- Polarization-dependent loss (PDL)
- 偏振模式分散(PMD)
- Evolution of polarization states
- Polarization extinction ratio (PER)
- Jones Matrix elements
- Muller Matrix elements