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FDE2850 series transmitter diode for industrial fibre optic systems

OMC has unveiled the FDE2850 series fibre optic transmitter (Tx) diode for use with 200µm glass fibre optic systems.

Designed to deliver high power at fast speeds it is intended for demanding applications, such as those found in mass transport, petrochemical, industrial datacomms and high-voltage energy infrastructure applications.

The emitter is available as a housed fibre-optic transmitter module in a range of housing and connector styles. Popular housed variants include the H13AE2850IR - a PCB-mount version with ST connector - and the H22E2850IR, which is the SMA PCB-mounting variant; both feature a precision-machined, all metal body and a rugged screw-mount design for reliable mechanical connection to circuit boards. The device delivers a typical coupled power of 813µW at 100mA into 200µm glass optical fibre, and can also be aligned to deliver good levels of power into fibre sizes as small as 50µm. Operating at the infrared 850nm wavelength, the device features a very fast rise and fall time of just 12ns.

OMC has made significant investments in capacity and has been able to reduce manufacturing lead times considerably on this part versus industry norms for this type of device and claims that it can turn around transmitter batches based on the FDE2850 in 6-8 weeks, and that this can be further expedited in many cases.

As with all of OMC’s fibre-optic transmitter and receiver devices, customers can take advantage of its Active Component Alignment technology. With many such transmitters on the marketplace, the device only specifies a minimum performance into one particular fibre size/type and/or at one nominal drive current. This means that unless the customer is using those precise conditions, they have to rely on typical figures in their link design, which can lead to inconsistency and yield issues as the minimum and maximum performance of the device under their application conditions is undefined.

When OMC’s Active Component Alignment is employed, the emitter is powered up and monitored while it is being aligned and installed into the housing during manufacture of the housed transmitter, and can therefore be characterised at each customer’s drive current and fibre size, allowing a strictly defined launch power window to be specified. This means that the customer can design their system in the knowledge that each and every device will perform within this known window when driven at their chosen drive current and coupled with the size and type of fibre they are using.

Neil Tyler

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OMC (UK) Ltd

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