OSA: Long-term Spectral Stability Measurement

In order to cope with the rapidly increasing traffic, wavelength division multiplexing (WDM) has been adopted to realize high-speed and large-capacity communication, and high-frequency modulated signals of complicated format are densely arranged in the WDM channel. Since the WDM communication system requires high stability in wavelength (or frequency) and power, long-term stability evaluation such as temperature cycle test and high load test is required for WDM transmission systems, as well as for semiconductor lasers  (LD) and optical transceivers that make up the system.

The applicable models can easily perform long-term measurements by using the data logging function and programming function that are equipped as standard, without using an external PC.

This is a function to repeatedly perform optical spectrum measurement, analysis, and data save under preset conditions. In the analysis, parameters such as WDM (peak wave length, peak level, OSNR) and DFB-LD (SMSR) can be analyzed, and each parameter value can record up to 10000 data per peak wavelength (channel). The recorded parameter values are displayed along with the maximum and minimum values as a logging table or graph with the vertical axis representing the amount of change and the horizontal axis representing time. Since the optical spectrum waveform at a specific time can be displayed by moving the cursor, it is possible to observe not only the analysis value but also the temporal change of the optical spectrum.

This is a function to create and register a series of measurement procedures as a program in advance and perform automatic measurement by itself.

Creating a program is very easy because you can select the command corresponding to the OSA key as if you were actually operating OSA. In addition, commands for loop control, condition judgment, variables, four arithmetic operations, parameter input, screen output, etc. are prepared for advanced programming.

It also supports remote control via ETHERNET or RS232, allowing direct control of external devices such as connected light sources and optical switches. Complex measurements such as repeated measurements while changing external measurement conditions can be easily performed without a PC.