Semiconductor Laser Bar Characterisation System
The EOCS is a fully automated, high performance, reliable and flexible measurement system to characterise and test edge emitting laser diode bars in an efficient way. The system measures frontside and backside optical power and voltage as a function of current, threshold, kink, horizontal and vertical far fields and optical spectrum.
The system is easy to use. The laser bars are loaded and unloaded on an external (manual or
automated) loading station on dedicated test chucks which will then be transferred to the EOCS. Depending on actual size in the order of 20 bars, corresponding to typically 1’000 diodes, can be loaded on the EOCS simultaneously, which results in a testing autonomy of about four hours without required operator intervention.
The measurement data together with the individual chipID is locally stored and regularly and automatically transferred through an Ethernet connection to a database on the network. 100 traceability of the measurement data for each laser diode is guaranteed independent from the used EOCS system by allocating each laser diode bar to the individual chuckID at the loading station which is also integrated in the process software.
The size of the equipment is 1.5m x 1m x 1.8m (L x W x H). It requires 220 V (or 110 V), vacuum (0.8 Bar) and Ethernet connections and is designed for clean room environments (Class 10'000).
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