Bristol Instruments offers a family of multi-wavelength meters for testing DWDM signals. The 428 Series Multi-Wavelength Meter measures the wavelength of as many as 250 optical channels to the highest accuracy available. In addition, the model 428 simultaneously measures power and OSNR to fully characterize DWDM components and transmission systems. With features such as straightforward operation and rugged design, the 428 system satisfies the needs of both the research scientist and the manufacturing engineer.
Two versions of the 428 Multi-Wavelength Meter are available. For the most demanding requirements, the model 428A measures wavelength to an accuracy of ± 0.3 pm. The model 428B, a lower-priced alternative, provides an accuracy of ± 1.2 pm for less exacting test requirements. Wavelength accuracy is maintained over long periods of time with continuous calibration using a built-in wavelength standard. This performance is verified by rigorously testing with laser sources that are traceable to an NIST standard.