Optical sensor modules test lasers, transceivers and amplifiers

Two modules from Yokogawa are enhanced versions of the AQ2200 optical sensor modules. The AQ2200-212 is a single channel optical sensor module, with an analogue output port, and the AQ2200-222 has two channels.

They are both designed to work with the AQ2200 series frame controllers, and offer improved performance over the existing AQ2200-221.

For optical measuring applications, both modules have low uncertainty and a wide power range. The AQ2200-222 has a power range of +15 to -90dBm, compared to the AQ2200-221’s +10 to -70dBm power range. The modules can also achieve a seamless measurement of approximately 30dB without switching the measurement range, says Yokogawa.

The modules have an improved uncertainty of ±2.5 per cent (compared to three per cent for the predecessor). Minimum averaging time has been halved to 100 microseconds, compared to the AQ2200-221.

Other performance figures include a wavelength range of 800 to 1700nm and a polarisation dependence of 0.02dB.

The new AQ2200 optical sensor modules are intended for manufacturers of active optical devices and components who need to test products such as lasers, optical transceivers, and optical amplifiers. They will also suit the needs of passive component manufacturers producing items such as optical fibres, optical connectors, and optical couplers, as well as manufacturers of optical transmission systems.

One of the main applications of the new products is I/L curve (drive current/optical power) measurement of laser diode modules. The single-range power range of the new sensor module is up to 30dB, meaning the I/L curve characteristics can be measured accurately, quickly and seamlessly, Yokogawa says.

Another is stress testing of an optical fibre cable. The ability of an optical fibre cable to resist impact is evaluated by measuring the momentary optical interruption and optical attenuation, as well as the degree of impact. Multiple AQ2200-212s allow optical inputs from the fibres to be measured following the application of a shock load, with the corresponding data sent to a data recorder via the analogue outputs.


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