EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of IEC EN 62150-4 testing. IEC EN 62150-4 specifies test and measurement procedures for relative density noise (RIN). It applies to lasers, laser transmitters and the transmitting part of transceivers.
This procedure examines whether the device or module meets the proper performance specification. The procedure is valid for single longitudinal mode (SLM). An optional part of the procedure offers a controlled return loss to the device under test, but only applies to devices connected to the SMF.
The method described in this standard provides a single RIN value averaging the noise over the transmission bandwidth using a time domain detection system. The measurement is made on a modulated laser that captures the RIN value under normal operating conditions.
An alternative RIN measurement method uses a photoreceiver and electrical spectrum analyzer and provides RIN versus electrical frequency comparison. This method provides an RIN value averaged over a certain electrical band determined by a filter. For a filter bandwidth and feature that replicates the filtering in a transmission system, this technique provides a suitable result for determining noise for such a system.
Laser intensity noise can be one of the limiting factors in the transmission of analog or digital signals. It can reduce the signal-to-noise ratio and increase the bit error rate, thus reducing system performance. Laser intensity noise can vary significantly depending on the characteristics of the laser and back reflections. To optimize communication links, it is important to accurately characterize the laser intensity noise, compare it to the signal power and, if necessary, provide an appropriate power budget.
EUROLAB assists manufacturers with IEC EN 62150-4 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.
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