what SFP do you use? I think the problem may caused by the SFP rather than the switch.

The card in my computer is a QLE2462 by Qlogic. The data says it's a 4GB dual channel card.
In the switch unit I have tried a Cisco SFP module that says it's a 1000Base-SX unit.
Also I have tried a Intel unit that is 4GB.
I have used the QLE2462 and the Intel unit to communication between the PC and a FACILIS storage unit that is used for video editing.
The software with the Facilis took care of all communications and it worked.
i really don't know a thing about communications with fiber optics and the Qlogic program appears to only try and communicate with a IP address and it
doesn't see the switches IP address at all.
Thanks much.
Win7 OS
Gigabyte MB
TL-SG3216
Synology DS1813+ NAS

The QLE2462 is 4GB dual Channel card, but the SFP port of the Tplink's switch only support 1G as well as your CIsco SFP module.

If you use a dual mode SFP, you should use dual fiber cable the the peer should also support dual mode. And the wave length should be the same, or the connection will suely fail.

If you are not farmilar with this, I would like to advise you to contact the support of the SFP module or fiber card for help.