Modal Content Analyser CMC-1550
A two-unit launch-and-receive instrument that uses the spatially and spectrally resolved imaging (S2) technique to identify and characterise the individual guided modes of few-mode and hollow core fiber at 1550 nm.
Technical overview
The CMC-1550 comprises a launch unit and a receiver unit. It applies the S2 technique to separate the individual propagating modes of the fiber under test, returning the Differential Group Delay (DGD) of each mode and its relative intensity, or Multipath Interference (MPI), against the most excited mode. From this it estimates mode-dependent propagation loss and assesses mode coupling, and reconstructs the mode profiles and phases of the guided modes. A loop measurement mode allows real-time measurement.
Features
- Measure hollow core and few-mode fibers, up to 400 um in diameter
- Reconstruction of propagation mode profiles and phases
- Calculate the relative intensity of high order modes compared to the most excited mode
- Calculate the DGD of the propagation modes
- Loop measurement mode enables real time measurement
Specifications
| Parameter | Value |
|---|---|
| Maximum fiber diameter | up to 400 um |
| Measurement technique | Spatially and spectrally resolved imaging (S2) |
| System configuration | Two units - a launch unit and a receiver unit |
| Measured parameters | Differential Group Delay (DGD) per propagation mode; relative intensity / Multipath Interference (MPI) compared to the most excited mode |
Applications
- Modal characterisation of few-mode fibers
- Modal characterisation of hollow core fibers
- Mode-dependent propagation loss estimation
- Mode coupling assessment
- Multipath Interference (MPI) and Differential Group Delay (DGD) measurement
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