Tool Speeds Manufacturing Testing & Inspection Of Optical Communication Products

Upasana Dewan


Yokogawa has expanded it’s multi-application modular optical test platform with a new optical sensor head that can perform optical power measurements with high stability and accuracy. The device is ideal for use in systems employed on production lines to test and inspect optical transceivers, optical fiber, and other components of optical communication networks.

The device makes accurate measurements in challenging applications such as power testing of laser chips in free space light, I/L curve measurement of laser-diode modules and multicore fibre measurements.

The new AQ2200-232 adds to the line-up of optical power meters modules (AQ2200-215 and AQ2200-221).

Key features are a 5 mm diameter cooled detector, ideal for measurements in free space, a wavelength measurement range from 800 to 1700 nm, and a power measurement range of +15 to -90 dBm. It also offers best-in-class uncertainty of ±1.8%, high stability with constant-temperature control, and a wide single-range power range of 30 dB.


“With the launch of the new optical sensor head, Yokogawa is expanding its multi-application modular optical test platform in line with market demands for higher-speed automatic testing of optical devices in free space, which helps to reduce testing time – and hence costs – compared to fibre-coupled tests.”, says Terry Marrinan, Vice-President Sales & Marketing, Yokogawa Europe & South-East Asia: “Post-production testing of laser diodes needs to be fast because the increasing market demand requires higher quantities and cheaper products, and the fastest way to measure their output is by measuring it in free space to eliminate the time involved in connecting and disconnecting the optical fibre to each laser produced.”

Yokogawa explained:”The sensors currently available on the market until now were not sensitive enough to obtain high-precision test results. The sensor’s reading should also be as accurate as possible because certain lasers emit low power by design (to respect international safety regulations) and their characterization must be very precise to be sure the laser is emitting the highest possible power without breaking the relevant safety laws.”

The company recognized these challenges and said it has addressed them by working closely with the manufacturers of laser diodes in order to develop the AQ2200-232. According to the firm, “the combination of a large-diameter photo-detector surface and the 30 dB power range of the new sensor head allows it to measure signals at high resolution under optimum conditions – hence the best-in-class sensitivity and accuracy.”

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